2015 Vol. 36 Issue 3
2015 Vol. 36, No. 3
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2015, 36(3): 1-3.
doi: 10.16779/j.cnki.1003-5508.2015.03.001
Abstract:
This paper recorded a new species i. e. Dendrocalamopsis lineariaurita Yi et L. Yang of Bamsusoidece,Poaceae,and a new forma Dendrocalamopsis lineariaurita Yi et L. Yang f. luridilineata Yi et L. Yang,f.,a new forma of Phyllostachys violascens(Carr.) A. et C. Riv. f. aurantiaYi,f. They were found recently in Dujianyan,Suchuan. These several new taxon could only be seen in the collection site of pattern species,and could not be seen or cultivatied in other sites.
This paper recorded a new species i. e. Dendrocalamopsis lineariaurita Yi et L. Yang of Bamsusoidece,Poaceae,and a new forma Dendrocalamopsis lineariaurita Yi et L. Yang f. luridilineata Yi et L. Yang,f.,a new forma of Phyllostachys violascens(Carr.) A. et C. Riv. f. aurantiaYi,f. They were found recently in Dujianyan,Suchuan. These several new taxon could only be seen in the collection site of pattern species,and could not be seen or cultivatied in other sites.
2015, 36(3): 4-7.
doi: 10.16779/j.cnki.1003-5508.2015.03.002
Abstract:
Based on a comparison of psychophysical methods between SBE and LCJ methods with other methods,the theoretical derivation and application of the two methods were compared. The result showed that the SBE method was a reliable, convenient and objective evaluation and prediction method. This method would have an important practical significance if it was introduced in scenic forest researches. It might enrich our provincal forest management theory,and guide landscape forest development and management.
Based on a comparison of psychophysical methods between SBE and LCJ methods with other methods,the theoretical derivation and application of the two methods were compared. The result showed that the SBE method was a reliable, convenient and objective evaluation and prediction method. This method would have an important practical significance if it was introduced in scenic forest researches. It might enrich our provincal forest management theory,and guide landscape forest development and management.
2015, 36(3): 8-12.
doi: 10.16779/j.cnki.1003-5508.2015.03.003
Abstract:
In this paper,taking the soil layer of zero to 4 cm thickness of 3 different forest types(pure fir forest,pure birch forest and mixed forest of birch and fir,in Liangtaigou of Lixian County of Sichuan as the research object,researches were conducted on the change rule of soil physical and chemical properties of the different forest types in order to provide theoretical basis for the sustainable development of artificial forests. The results of the study showed that (1) their soil water content decreased with the increase of the soil depth:mixed forest > pure birch forest > pure fir forest (2) changes of particle content in soil mechanical composition of different forest types were as follows:sand > silt > clay,and the sand content in the soil:pure fir forest > pure birch forest > mixed forest of birch and fir,and yet coarse silt,fine silt and clay displayed an opposite trend (3) The soil pH value was between 5.3~5.8,pH value of 3 forest types increased with the increasing of soil depth,but there was no significant difference in the pH value. Among them,the pH value of fir forest was the lowest and the pH value of mixed forest was the highest; (4) 3 kinds of soil organic matter,total N,available P and available K all decreased with the increase of the soil depth,showing obvious "accumulation" phenomenon. Their contents were as follows:pure birch forest > mixed forest of birch and fir > pure fir forest.
In this paper,taking the soil layer of zero to 4 cm thickness of 3 different forest types(pure fir forest,pure birch forest and mixed forest of birch and fir,in Liangtaigou of Lixian County of Sichuan as the research object,researches were conducted on the change rule of soil physical and chemical properties of the different forest types in order to provide theoretical basis for the sustainable development of artificial forests. The results of the study showed that (1) their soil water content decreased with the increase of the soil depth:mixed forest > pure birch forest > pure fir forest (2) changes of particle content in soil mechanical composition of different forest types were as follows:sand > silt > clay,and the sand content in the soil:pure fir forest > pure birch forest > mixed forest of birch and fir,and yet coarse silt,fine silt and clay displayed an opposite trend (3) The soil pH value was between 5.3~5.8,pH value of 3 forest types increased with the increasing of soil depth,but there was no significant difference in the pH value. Among them,the pH value of fir forest was the lowest and the pH value of mixed forest was the highest; (4) 3 kinds of soil organic matter,total N,available P and available K all decreased with the increase of the soil depth,showing obvious "accumulation" phenomenon. Their contents were as follows:pure birch forest > mixed forest of birch and fir > pure fir forest.
2015, 36(3): 13-17.
doi: 10.16779/j.cnki.1003-5508.2015.03.004
Abstract:
The research on forest growth characteristics was conducted on the 25-year-old Populus lasiocarpa Oliv. planted in Luding county in west Sichuan plateau by using stem analysis method. The results indicated that the DBH,tree height and tree volume growth of the 25-year-old Populus lasiocarpa Oliv. were 27.65 cm,20.5 m and 0.56047 m3, respectively. The current annual increment tendency of the DBH,tree height and tree volume increased at first and then decreased with the increase of the age. So did the mean annual increment. The current annual increment and mean annual increment of DBH reached maximum at the age of 6 and 9,and their values were 1.65 cm and 1.43 cm respectively. The current annual increment and mean annual increment of tree height almost reached maximum at around 9 years old at the same time,and their values were 1.69 m and 1.51 m respectively. The current annual increment of timber volume reached the maximum value of about 0.03947 m3 at the age of 21,while the mean annual increment reached the maximum value of about 0.02242 m3 at the age of 25. The current annual increment and the mean annual increment of the timber volume intersected at the age of 25,which meant that the Populus lasiocarpa Oliv. growth process had reached its quantitative maturity at the age of 25. The volume growth rate and the breast height form factor of Populus lasiocarpa Oliv. decreased with the increase of the age growth. The tree form was basically steady at the age of about 12.
The research on forest growth characteristics was conducted on the 25-year-old Populus lasiocarpa Oliv. planted in Luding county in west Sichuan plateau by using stem analysis method. The results indicated that the DBH,tree height and tree volume growth of the 25-year-old Populus lasiocarpa Oliv. were 27.65 cm,20.5 m and 0.56047 m3, respectively. The current annual increment tendency of the DBH,tree height and tree volume increased at first and then decreased with the increase of the age. So did the mean annual increment. The current annual increment and mean annual increment of DBH reached maximum at the age of 6 and 9,and their values were 1.65 cm and 1.43 cm respectively. The current annual increment and mean annual increment of tree height almost reached maximum at around 9 years old at the same time,and their values were 1.69 m and 1.51 m respectively. The current annual increment of timber volume reached the maximum value of about 0.03947 m3 at the age of 21,while the mean annual increment reached the maximum value of about 0.02242 m3 at the age of 25. The current annual increment and the mean annual increment of the timber volume intersected at the age of 25,which meant that the Populus lasiocarpa Oliv. growth process had reached its quantitative maturity at the age of 25. The volume growth rate and the breast height form factor of Populus lasiocarpa Oliv. decreased with the increase of the age growth. The tree form was basically steady at the age of about 12.
2015, 36(3): 18-24.
doi: 10.16779/j.cnki.1003-5508.2015.03.005
Abstract:
Davidia involucrata Baillon,as a unique monotypic species,is listed as Class I at the national key protected plants,which has highly ornamental,economic and ecological value. In this paper,based on the principle of "Seed Collecting in Near Zone ",investigations were made on the biologic characteristics,breeding,cultivation and domestication of D.involucrata in Chengdu Plain. The results showed that 1) when shoots cuttings were treated by 50 mg·kg-1 indole butyric acid, the rooting rate of 5 to 6 years old dove trees was approximately 70%; the rooting rate of 11 to 15 years old dove trees was 50% or less. Different hormones(IBA,NAA,IAA) were compared on softwood rooting rate. Treatments with IBA and NAA exhibited an obvious rooting rate,their rooting rate was between 65% to 97%. Compared with softwood cuttings,hardwood cuttings' rooting rate was significantly low,at the highest its rate base rooting initiation under paragraph was only 5.5%. 2) The plant height of the grafted seedlings was lower than the seedlings from seeds,and larger in diameter. Overall,grafting seedlings were healed well,and plants were robust. 3) Different sand methods had no obvious effect on seed germination rate. 4) The survival rate of high-pressure nursery was about 87.6%, especially in D.involucrata forest, providing early flowering seedlings in the short term. Meanwhile,the management of D.involucrata cultivation techniques was summarized from a low altitude introduction and cultivation,sowing breeding,breeding and grafting cuttings breeding,etc. It would provide scientific reference for the introduction, breeding and conservation of natural resources of D.involucrata.
Davidia involucrata Baillon,as a unique monotypic species,is listed as Class I at the national key protected plants,which has highly ornamental,economic and ecological value. In this paper,based on the principle of "Seed Collecting in Near Zone ",investigations were made on the biologic characteristics,breeding,cultivation and domestication of D.involucrata in Chengdu Plain. The results showed that 1) when shoots cuttings were treated by 50 mg·kg-1 indole butyric acid, the rooting rate of 5 to 6 years old dove trees was approximately 70%; the rooting rate of 11 to 15 years old dove trees was 50% or less. Different hormones(IBA,NAA,IAA) were compared on softwood rooting rate. Treatments with IBA and NAA exhibited an obvious rooting rate,their rooting rate was between 65% to 97%. Compared with softwood cuttings,hardwood cuttings' rooting rate was significantly low,at the highest its rate base rooting initiation under paragraph was only 5.5%. 2) The plant height of the grafted seedlings was lower than the seedlings from seeds,and larger in diameter. Overall,grafting seedlings were healed well,and plants were robust. 3) Different sand methods had no obvious effect on seed germination rate. 4) The survival rate of high-pressure nursery was about 87.6%, especially in D.involucrata forest, providing early flowering seedlings in the short term. Meanwhile,the management of D.involucrata cultivation techniques was summarized from a low altitude introduction and cultivation,sowing breeding,breeding and grafting cuttings breeding,etc. It would provide scientific reference for the introduction, breeding and conservation of natural resources of D.involucrata.
2015, 36(3): 25-30.
doi: 10.16779/j.cnki.1003-5508.2015.03.006
Abstract:
In this paper,taking 33 years old low-efficiency Cupressus funebris plantation for an object,researches were conducted on the short-term effect of 15% (T1),25% (T2),35% (T3,) and 50% (T4) thinning on the changes and correlation of its soil organic carbon and active carbon. This low-efficiency Cupressus funebris plantation is located in Jingyang District of Deyang City,Sichuan Province. The results indicated that after one year,the total organic carbon(TOC),microbial biomass carbon(MBC),readily oxidizable carbon(ROC),and water-soluble organic carbon(WSOC) increased with the strengthening of thinning intensity,while the positive effects of T3 and T4 were significant at the level of 0.05. Furthermore,there existed significant positive correlations among the TOC and ROC,WSOC and SMBC. Thus,the results displayed that the thinning could facilitate Cupressus funebris to sequestrate more carbon in the soil of the low-efficiency plantation within hilly regions of Sichuan.
In this paper,taking 33 years old low-efficiency Cupressus funebris plantation for an object,researches were conducted on the short-term effect of 15% (T1),25% (T2),35% (T3,) and 50% (T4) thinning on the changes and correlation of its soil organic carbon and active carbon. This low-efficiency Cupressus funebris plantation is located in Jingyang District of Deyang City,Sichuan Province. The results indicated that after one year,the total organic carbon(TOC),microbial biomass carbon(MBC),readily oxidizable carbon(ROC),and water-soluble organic carbon(WSOC) increased with the strengthening of thinning intensity,while the positive effects of T3 and T4 were significant at the level of 0.05. Furthermore,there existed significant positive correlations among the TOC and ROC,WSOC and SMBC. Thus,the results displayed that the thinning could facilitate Cupressus funebris to sequestrate more carbon in the soil of the low-efficiency plantation within hilly regions of Sichuan.
2015, 36(3): 31-32.
doi: 10.16779/j.cnki.1003-5508.2015.03.007
Abstract:
2015, 36(3): 33-39.
doi: 10.16779/j.cnki.1003-5508.2015.03.008
Abstract:
2015, 36(3): 40-44.
doi: 10.16779/j.cnki.1003-5508.2015.03.009
Abstract:
2015, 36(3): 45-49.
doi: 10.16779/j.cnki.1003-5508.2015.03.010
Abstract:
By referring to domestic and international related literature about the ecological evaluation of the Defarming-and-reafforestation project, this paper deals with the importance of ecological benefit of this project,and its domestic research status and methods, analyzes its existing problems, and puts forward some solving measures and the future research direction,in order to provide reference for scientific and accurate evaluation of its ecological benefit.
By referring to domestic and international related literature about the ecological evaluation of the Defarming-and-reafforestation project, this paper deals with the importance of ecological benefit of this project,and its domestic research status and methods, analyzes its existing problems, and puts forward some solving measures and the future research direction,in order to provide reference for scientific and accurate evaluation of its ecological benefit.
2015, 36(3): 50-54.
doi: 10.16779/j.cnki.1003-5508.2015.03.011
Abstract:
Urbanization has inevitably brought the threat to the urban water ecosystem. Ecological restoration and water environment rehabilitation play the major effect in the urban water system control. The ecological restoration of urban water system has three key elements,including water quality,water quantity and aquatic ecosystems. The important restoration measures consist of wetland building,vegetation planting,riparian ecology governance,and others closely related to urban wetlands. There are some common intersections between urban water system ecological restoration and urban wetland planning,such as goals, approaches,measures and technologies. With the ecology theory as the guiding principle,an urban wetland net can be built to merge with urban water system, urban ecological corridors and green patches on the basis of the existing urban water system resources. Taking the Meishan City of Sichuan province for example,this paper proposes for the urban planning and development of the wetland ecological restoration of the urban water system.
Urbanization has inevitably brought the threat to the urban water ecosystem. Ecological restoration and water environment rehabilitation play the major effect in the urban water system control. The ecological restoration of urban water system has three key elements,including water quality,water quantity and aquatic ecosystems. The important restoration measures consist of wetland building,vegetation planting,riparian ecology governance,and others closely related to urban wetlands. There are some common intersections between urban water system ecological restoration and urban wetland planning,such as goals, approaches,measures and technologies. With the ecology theory as the guiding principle,an urban wetland net can be built to merge with urban water system, urban ecological corridors and green patches on the basis of the existing urban water system resources. Taking the Meishan City of Sichuan province for example,this paper proposes for the urban planning and development of the wetland ecological restoration of the urban water system.
2015, 36(3): 55-61.
doi: 10.16779/j.cnki.1003-5508.2015.03.012
Abstract:
Grassland is the principal part in Kangding green vegetation ecosystem and is an important part to maintain the ecological balance of Kangding. In this paper,evaluation was made on the grassland degradation in Kangding based on remote sensing and GIS technology. The grassland was evaluated into four grades including inconspicuously degraded grassland, slightly degraded grassland, moderately degraded grassland and severely degraded grassland. Then according to the evaluation results,degraded grassland spatial distribution was analyzed by combining with information of elevation,slope gradient,slope aspect and settlements. Moreover,reasons of grassland degradation were discussed,and restoration and management countermeasures of degraded grassland were also proposed in this paper.
Grassland is the principal part in Kangding green vegetation ecosystem and is an important part to maintain the ecological balance of Kangding. In this paper,evaluation was made on the grassland degradation in Kangding based on remote sensing and GIS technology. The grassland was evaluated into four grades including inconspicuously degraded grassland, slightly degraded grassland, moderately degraded grassland and severely degraded grassland. Then according to the evaluation results,degraded grassland spatial distribution was analyzed by combining with information of elevation,slope gradient,slope aspect and settlements. Moreover,reasons of grassland degradation were discussed,and restoration and management countermeasures of degraded grassland were also proposed in this paper.
2015, 36(3): 62-68.
doi: 10.16779/j.cnki.1003-5508.2015.03.013
Abstract:
2015, 36(3): 69-74.
doi: 10.16779/j.cnki.1003-5508.2015.03.014
Abstract:
The takin is one of the key species in Tangjiahe National Nature Reserve. And yet some takins are frequently found dead during the routine monitoring in recent years. Such kind of death could be the results of diseases or starvation which were usually induced by over abundant population. Therefore,to assess takin population and estimate the carrying capacity,field survey and nutrition analysis were conducted from December 2012 to October 2014. The rcsults showed that the total energy provided by six plants in the winter-suitable habitat range summed up to 2.82 ±1.31×1010 KJ and the energy required per adult takin for over wintering was 7.24×106 KJ. And therefore the reserve could support 778 ±362 adult takins. The takin density was found to be 2.48 takins per hectare on alpine meadow during summer,and therefore it was estimated that 1324 takins were currently scattered within its summer range,less than its carrying capacity. It is recommended that it should be appropriate to keep the takin population less than 1 500 individuals,namely,5.4 takins per hectare in Tangjiahe National Nature Reserve.
The takin is one of the key species in Tangjiahe National Nature Reserve. And yet some takins are frequently found dead during the routine monitoring in recent years. Such kind of death could be the results of diseases or starvation which were usually induced by over abundant population. Therefore,to assess takin population and estimate the carrying capacity,field survey and nutrition analysis were conducted from December 2012 to October 2014. The rcsults showed that the total energy provided by six plants in the winter-suitable habitat range summed up to 2.82 ±1.31×1010 KJ and the energy required per adult takin for over wintering was 7.24×106 KJ. And therefore the reserve could support 778 ±362 adult takins. The takin density was found to be 2.48 takins per hectare on alpine meadow during summer,and therefore it was estimated that 1324 takins were currently scattered within its summer range,less than its carrying capacity. It is recommended that it should be appropriate to keep the takin population less than 1 500 individuals,namely,5.4 takins per hectare in Tangjiahe National Nature Reserve.
2015, 36(3): 75-79.
doi: 10.16779/j.cnki.1003-5508.2015.03.015
Abstract:
Th tree growth is affected by many environmental factors,but the water is the most important environmental factor affecting the growth and development of trees. This paper reviews the recent research methods of water influence tree growth and measurement indicators,and deals with the prospect of the dynamic tree on the adaptive response mechanism of water stress from the micro and macro field.
Th tree growth is affected by many environmental factors,but the water is the most important environmental factor affecting the growth and development of trees. This paper reviews the recent research methods of water influence tree growth and measurement indicators,and deals with the prospect of the dynamic tree on the adaptive response mechanism of water stress from the micro and macro field.
2015, 36(3): 80-84.
doi: 10.16779/j.cnki.1003-5508.2015.03.016
Abstract:
Modern forestry production is an enterprise of managing photosynthesis,and is affected by the rate of using light energy in the tree size because of the high and low productivity of forest management. This paper reviewed the research on the relationship between light and the radiation and forestry production,and analyzed the effects of spectral components,illumination time and light intensity on forestry production. With the development of forestry science and technology,such factors as the rate of tree species selection of high light energy utilization,the simulation of natural reasonable forest stand structure,and the formulation of management measures and scientific management scheme would become effective ways to improve forest light rate in the future.
Modern forestry production is an enterprise of managing photosynthesis,and is affected by the rate of using light energy in the tree size because of the high and low productivity of forest management. This paper reviewed the research on the relationship between light and the radiation and forestry production,and analyzed the effects of spectral components,illumination time and light intensity on forestry production. With the development of forestry science and technology,such factors as the rate of tree species selection of high light energy utilization,the simulation of natural reasonable forest stand structure,and the formulation of management measures and scientific management scheme would become effective ways to improve forest light rate in the future.
2015, 36(3): 85-87.
doi: 10.16779/j.cnki.1003-5508.2015.03.017
Abstract:
Eighteen soil samples were collected in six experiment areas including Luding,Kangding,Danba,Batang,Xiangcheng and Derong,which were the major walnut production regions of Ganzi Tibetan Autonomous Prefecture. Six indexes of heavy metals and two indexes of pesticide residues were determined by the relevant national standards, and were evaluated by green food soil environmental quality LY/T1678-2006. The results showed that heavy metals and pesticide residues contents met the requirement of green food soil environmental quality LY/T1678-2006. The soil environmental quality was good,which had the basic conditions for developing the walnut green food and pollution-free forest fruit products. This study would provide scientific evidence for guiding the production of walnut green food and economic forestry estate layout all over the prefecture.
Eighteen soil samples were collected in six experiment areas including Luding,Kangding,Danba,Batang,Xiangcheng and Derong,which were the major walnut production regions of Ganzi Tibetan Autonomous Prefecture. Six indexes of heavy metals and two indexes of pesticide residues were determined by the relevant national standards, and were evaluated by green food soil environmental quality LY/T1678-2006. The results showed that heavy metals and pesticide residues contents met the requirement of green food soil environmental quality LY/T1678-2006. The soil environmental quality was good,which had the basic conditions for developing the walnut green food and pollution-free forest fruit products. This study would provide scientific evidence for guiding the production of walnut green food and economic forestry estate layout all over the prefecture.
2015, 36(3): 88-90.
doi: 10.16779/j.cnki.1003-5508.2015.03.018
Abstract:
In the accelerating germination experiment,the seeds of Urophysa rochkii were soaked with different concentrations(50 mg·L-1,100 mg·L-1,200 mg·L-1,400 mg·L-1 and 800 mg·L-1) of GA3,which were treated by the cold stratification in the refrigerator,and then their germination rate was measured in the Petri dish. The results showed that the seeds of Urophysa rochkii had dormancy characteristics,the cold stratification could promote the germination of Urophysa rochkii seeds and the germination rate would increase with the increase of the time. Soaking with gibberellins before stratification had obvious effects on the germination of Urophysa rochkii seeds. The seeds stratified for 60 days after soaked with gibberellins at the concentration of 400 mg·L-1 for 24 hours had better effects,their germination rate and germination performance reached 83.91% and 51.60%,respectively.
In the accelerating germination experiment,the seeds of Urophysa rochkii were soaked with different concentrations(50 mg·L-1,100 mg·L-1,200 mg·L-1,400 mg·L-1 and 800 mg·L-1) of GA3,which were treated by the cold stratification in the refrigerator,and then their germination rate was measured in the Petri dish. The results showed that the seeds of Urophysa rochkii had dormancy characteristics,the cold stratification could promote the germination of Urophysa rochkii seeds and the germination rate would increase with the increase of the time. Soaking with gibberellins before stratification had obvious effects on the germination of Urophysa rochkii seeds. The seeds stratified for 60 days after soaked with gibberellins at the concentration of 400 mg·L-1 for 24 hours had better effects,their germination rate and germination performance reached 83.91% and 51.60%,respectively.
2015, 36(3): 91-93.
doi: 10.16779/j.cnki.1003-5508.2015.03.019
Abstract:
2015, 36(3): 94-97.
doi: 10.16779/j.cnki.1003-5508.2015.03.020
Abstract:
By using three kinds of composted matrixes and forest soil as control and after researching their physicochemical properties, seedling-raising substrate tests of Aquilaria sinensis were conducted in the Puwen Forest Farm. The results showed that (1) three composted matrixes were light matrixes and their available nutrients were higher than those of forest soil. (2) The seedling height,ground diameter and biomass in four kinds of matrixes had obvious differences. The best performance was 1#substrate(milled bagass + 20% of the volume of the cow dung,vhaep=2m3),and the worst performance was forest soil(CK). Therefore,the 1#substrate was the most ideal seedling matrix of Aquilaria sinensis in this study.
By using three kinds of composted matrixes and forest soil as control and after researching their physicochemical properties, seedling-raising substrate tests of Aquilaria sinensis were conducted in the Puwen Forest Farm. The results showed that (1) three composted matrixes were light matrixes and their available nutrients were higher than those of forest soil. (2) The seedling height,ground diameter and biomass in four kinds of matrixes had obvious differences. The best performance was 1#substrate(milled bagass + 20% of the volume of the cow dung,vhaep=2m3),and the worst performance was forest soil(CK). Therefore,the 1#substrate was the most ideal seedling matrix of Aquilaria sinensis in this study.
2015, 36(3): 98-101.
doi: 10.16779/j.cnki.1003-5508.2015.03.021
Abstract:
The trials of formula fertilization to young Eucalyptus grandis growth were conducted on yellow earth soil in Anxian county. The results showed that the effect was obvious for fertilizer formula of 170g (NH2)2CO + 250g Ca(H2PO4)2·H2O + 55 g K2SO4 for each tree.
The trials of formula fertilization to young Eucalyptus grandis growth were conducted on yellow earth soil in Anxian county. The results showed that the effect was obvious for fertilizer formula of 170g (NH2)2CO + 250g Ca(H2PO4)2·H2O + 55 g K2SO4 for each tree.
2015, 36(3): 102-105.
doi: 10.16779/j.cnki.1003-5508.2015.03.022
Abstract:
To study the effects of konjac planting on the soil anzyme activity of two kinds of pear plamtations,taking pear woodland without planting konjac as a control,studies were made of the activity of urease,invertase and phosphatase in soil of different forest lands. The results showed that the effect of planting konjac on the activity of urease and phosphatase in the pear forest soil was not significant,but invertase activity had a significant increase. The phosphatase and invertase activity in Changji pear forest soil after planting konjac did not change significantly,and yet urease activity decreased significantly; invertase activity decreased significantly after plowing Changji pear forest soil,urease and phosphatase activity did not change significantly. As could be seen the effect of konjac planting in pear woodland on soil enzyme activity was not significant. But real tillage would make the soil enzyme activity decrease significantly.
To study the effects of konjac planting on the soil anzyme activity of two kinds of pear plamtations,taking pear woodland without planting konjac as a control,studies were made of the activity of urease,invertase and phosphatase in soil of different forest lands. The results showed that the effect of planting konjac on the activity of urease and phosphatase in the pear forest soil was not significant,but invertase activity had a significant increase. The phosphatase and invertase activity in Changji pear forest soil after planting konjac did not change significantly,and yet urease activity decreased significantly; invertase activity decreased significantly after plowing Changji pear forest soil,urease and phosphatase activity did not change significantly. As could be seen the effect of konjac planting in pear woodland on soil enzyme activity was not significant. But real tillage would make the soil enzyme activity decrease significantly.
2015, 36(3): 106-109.
doi: 10.16779/j.cnki.1003-5508.2015.03.023
Abstract:
In this paper,studies were mainly made of the soil sample by boiling water extraction for 5 minutes for the purpose of determination of boron content. The method was used to form a yellow complex by boron and azomethine in weak acidic solution in order to make a colorimetric determination,in the range of 0~10 mg·10 ml-1 by use of the Lambert-Bill law determination method, and the sensitivity was 0.0013 mg·cm-2. The extraction was directly determinated by inductively coupled plasma atomic emission spectrometry(ICP-AES),the detection limit was 0.0041,and the variation coefficient was 3.49%. Comparing the test of soil effective state of national standard substances,methods of coefficient of variation were 4.24% and 20.84%. The test results of the ICP-AES were better than those of the colorimetric method.
In this paper,studies were mainly made of the soil sample by boiling water extraction for 5 minutes for the purpose of determination of boron content. The method was used to form a yellow complex by boron and azomethine in weak acidic solution in order to make a colorimetric determination,in the range of 0~10 mg·10 ml-1 by use of the Lambert-Bill law determination method, and the sensitivity was 0.0013 mg·cm-2. The extraction was directly determinated by inductively coupled plasma atomic emission spectrometry(ICP-AES),the detection limit was 0.0041,and the variation coefficient was 3.49%. Comparing the test of soil effective state of national standard substances,methods of coefficient of variation were 4.24% and 20.84%. The test results of the ICP-AES were better than those of the colorimetric method.
2015, 36(3): 110-111.
doi: 10.16779/j.cnki.1003-5508.2015.03.024
Abstract:
The sarong method was used for analysizing the effect of the three kinds of pesticides(avermectin,imidacloprid and decis) for controlling Clostera anachoreta(Denis et Schiffermüller,1775). The result showed that 4 000 times and 6 000 times liquids of avermectin could get the best effect within 48 hours after application,with the mortality rate of larva reaching 100 percent. The next was decis,within 72 hours after application,the mortality rate of larva reached 93.19 percent. From the cost saving and environment protection into consideration,the order of application of three kinds of pesticides was 6 000 times avermectin liquid,4 000 times of imidacloprid liquid and 2 000 times of decis liquid.
The sarong method was used for analysizing the effect of the three kinds of pesticides(avermectin,imidacloprid and decis) for controlling Clostera anachoreta(Denis et Schiffermüller,1775). The result showed that 4 000 times and 6 000 times liquids of avermectin could get the best effect within 48 hours after application,with the mortality rate of larva reaching 100 percent. The next was decis,within 72 hours after application,the mortality rate of larva reached 93.19 percent. From the cost saving and environment protection into consideration,the order of application of three kinds of pesticides was 6 000 times avermectin liquid,4 000 times of imidacloprid liquid and 2 000 times of decis liquid.
2015, 36(3): 112-114,74.
doi: 10.16779/j.cnki.1003-5508.2015.03.025
Abstract:
An investigation was conducted on the distribution and the ecological characteristics of Chinese endemic plant Tetradoxa omeiensis. The results have shown that only five populations of T. omeiensis are found on Mountain Emei with a very narrow distribution,growing in coniferous and broad-leaved mixed forest with an altitude of about 2 300 meters. The stroma suitable for Tetradoxa omeiensis is Plagiothecium denticulatum,an epiphyte growing on tree roots and branches. Harsh environment and difficulty in sexual propagation are the main reasons which lead to the endangerment of Tetradoxa omeiensis. Studies on in-situ conservation and seed breeding are the effective ways to protect this species.
An investigation was conducted on the distribution and the ecological characteristics of Chinese endemic plant Tetradoxa omeiensis. The results have shown that only five populations of T. omeiensis are found on Mountain Emei with a very narrow distribution,growing in coniferous and broad-leaved mixed forest with an altitude of about 2 300 meters. The stroma suitable for Tetradoxa omeiensis is Plagiothecium denticulatum,an epiphyte growing on tree roots and branches. Harsh environment and difficulty in sexual propagation are the main reasons which lead to the endangerment of Tetradoxa omeiensis. Studies on in-situ conservation and seed breeding are the effective ways to protect this species.
2015, 36(3): 115-119.
doi: 10.16779/j.cnki.1003-5508.2015.03.026
Abstract:
Emmenopterys henryi is one of the second-class protection plants of China,whose population amount is very scanty. In order to draw up a scientific and rational protection measures of Emmenopterys henryi,according to Lushan post-earthquake overall deployment and 《Lushan post-earthquake ecological environment recovery and rehabitation professional plan》,investigations were made on the Emmenopterys henryi resource in Tianquan County. The methed was to combine a resources survey with counseling,visiting,and quadrat investigation,and analysis was made of the ecological environment. The result showed that there were 62 Emmenopterys henryi trees in Tianquan County. The population was less and exhibited a declining trend,and diseases and insect pests were serious,lacking of seedlings and saplings and natural regeneration. Emmenopterys henryi trees were distributed in Zishi,Renyi and Xiaohe township,while their diameter was mainly concentrated between 8 cm and 22 cm. The vegetation of Emmenopterys henryi habitat was rich,and trees,shrubs,herbs,ferns respectively were 19 species,15 species,30 species and 11 species,and their inter specific competition was at a disadvantage. Their geographical distribution was concentrated at lower slopes,valleys and ditches between the altitude of 1 000 m and 1 400 m, where ambient air humidity was big and soil was relatively infertile.
Emmenopterys henryi is one of the second-class protection plants of China,whose population amount is very scanty. In order to draw up a scientific and rational protection measures of Emmenopterys henryi,according to Lushan post-earthquake overall deployment and 《Lushan post-earthquake ecological environment recovery and rehabitation professional plan》,investigations were made on the Emmenopterys henryi resource in Tianquan County. The methed was to combine a resources survey with counseling,visiting,and quadrat investigation,and analysis was made of the ecological environment. The result showed that there were 62 Emmenopterys henryi trees in Tianquan County. The population was less and exhibited a declining trend,and diseases and insect pests were serious,lacking of seedlings and saplings and natural regeneration. Emmenopterys henryi trees were distributed in Zishi,Renyi and Xiaohe township,while their diameter was mainly concentrated between 8 cm and 22 cm. The vegetation of Emmenopterys henryi habitat was rich,and trees,shrubs,herbs,ferns respectively were 19 species,15 species,30 species and 11 species,and their inter specific competition was at a disadvantage. Their geographical distribution was concentrated at lower slopes,valleys and ditches between the altitude of 1 000 m and 1 400 m, where ambient air humidity was big and soil was relatively infertile.
2015, 36(3): 120-124,71.
doi: 10.16779/j.cnki.1003-5508.2015.03.027
Abstract:
All areas were investigated in Tianquan conunty to find out where Cystoathyrium chinensis was scattered. By focusing on three methods of survey:line-intercept,quadrat sampling and habitat investigating,it was known that Cystoathyrium chinensis was distributed in the Tuanniuping,Erlang Mount,Tianquan County,growing at both sides of the gulch. Its main features were as follows:very narrow distribution range and extremely sparse guantity. Besides,its habitat conditions were special and biotic potential was low. The major reasons causing the endangerment of Cystoathyrium chinensis displayed the following sides:the plant itself had many biological disadvantages,the growing environmental conditions were very rigorous and its competitive ability with other species was weak,etc. Based on its resource status and endangered mechanism,some appropriate suggestions were proposed like initiating widely propaganda and educational work,strengthening the protection of existing resource,off-site preservation,and building extremely small population of Cystoathyrium chinensis,etc,to protect it.
All areas were investigated in Tianquan conunty to find out where Cystoathyrium chinensis was scattered. By focusing on three methods of survey:line-intercept,quadrat sampling and habitat investigating,it was known that Cystoathyrium chinensis was distributed in the Tuanniuping,Erlang Mount,Tianquan County,growing at both sides of the gulch. Its main features were as follows:very narrow distribution range and extremely sparse guantity. Besides,its habitat conditions were special and biotic potential was low. The major reasons causing the endangerment of Cystoathyrium chinensis displayed the following sides:the plant itself had many biological disadvantages,the growing environmental conditions were very rigorous and its competitive ability with other species was weak,etc. Based on its resource status and endangered mechanism,some appropriate suggestions were proposed like initiating widely propaganda and educational work,strengthening the protection of existing resource,off-site preservation,and building extremely small population of Cystoathyrium chinensis,etc,to protect it.
2015, 36(3): 125-132.
doi: 10.16779/j.cnki.1003-5508.2015.03.028
Abstract:
In this paper,a survey was made on the exotic plants of Wolong National Natural Reserve. It was found that there were 224 exotic species in Wolong,belonging to 86 families and 173 genera,occupying about 10 percent of the total higher plants known in Wolong. After screening,it was found that there were 16 kinds of invasive alien plants,involving 11 families and 16 genera,including 5 spevies from Compositae,2 species from Leguminosae,1 species from Gramineae,1 species from Convolvulaceae,1 species from Amaranthaceae,1 species from Onagraceae,1 species from Moraceae,1 species from Solanaceae,1 species from Nyctaginaceae, 1 species from Boraginaceae and 1 species from Pontederiaceae. Analysis of the survey has shown that Galinsoga parviflora and Conyz canadensis of the Compositae,Trifolium repens of the Leguminosae,comfrey of the Boraginaceae,and ryegrass of the Gramineae are widely distributed in the survey area. They are harmful. High attention should be paid to them. Besides,according to the actual condition of the reserve,some relevant prevention and control measures are puts formard in this paper.
In this paper,a survey was made on the exotic plants of Wolong National Natural Reserve. It was found that there were 224 exotic species in Wolong,belonging to 86 families and 173 genera,occupying about 10 percent of the total higher plants known in Wolong. After screening,it was found that there were 16 kinds of invasive alien plants,involving 11 families and 16 genera,including 5 spevies from Compositae,2 species from Leguminosae,1 species from Gramineae,1 species from Convolvulaceae,1 species from Amaranthaceae,1 species from Onagraceae,1 species from Moraceae,1 species from Solanaceae,1 species from Nyctaginaceae, 1 species from Boraginaceae and 1 species from Pontederiaceae. Analysis of the survey has shown that Galinsoga parviflora and Conyz canadensis of the Compositae,Trifolium repens of the Leguminosae,comfrey of the Boraginaceae,and ryegrass of the Gramineae are widely distributed in the survey area. They are harmful. High attention should be paid to them. Besides,according to the actual condition of the reserve,some relevant prevention and control measures are puts formard in this paper.
2015, 36(3): 133-135.
doi: 10.16779/j.cnki.1003-5508.2015.03.029
Abstract:
Danba County has plenty of wild rhododendrons. An initial investigation was conducted on the resources of the genus Rhododendron in Danba by filed collection of live materials,as well as by researches on the specimens in herbariums. The results showed that in this investigation twenty-two species had been found and each of them had a great amount of populations; the community of rhododendrons was stupendous. Specifically,the authors have found Rhododendron danbaense L. C. Hu and Rh. nigroglandulosum Nitzelius in many places. Those two taxa were believed to have few amounts in the wild,and according to Flora Repubulicae Popularis Sinicae there was no specimen of Rh. nigroglandulosum found in China yet.
Danba County has plenty of wild rhododendrons. An initial investigation was conducted on the resources of the genus Rhododendron in Danba by filed collection of live materials,as well as by researches on the specimens in herbariums. The results showed that in this investigation twenty-two species had been found and each of them had a great amount of populations; the community of rhododendrons was stupendous. Specifically,the authors have found Rhododendron danbaense L. C. Hu and Rh. nigroglandulosum Nitzelius in many places. Those two taxa were believed to have few amounts in the wild,and according to Flora Repubulicae Popularis Sinicae there was no specimen of Rh. nigroglandulosum found in China yet.
2015, 36(3): 136-138,93.
doi: 10.16779/j.cnki.1003-5508.2015.03.030
Abstract:
2015, 36(3): 139-142.
doi: 10.16779/j.cnki.1003-5508.2015.03.031
Abstract:
2015, 36(3): 143-146.
doi: 10.16779/j.cnki.1003-5508.2015.03.032
Abstract:
In this paper,a deseription is mainly made of the basic situation of Donghekou earthquake site park,analysis is made of the favorable conditions and unfavorable factors in the landscape transformation, and the guiding idea and the principles are put forward for explaining the main content of plant landscape transformation design of the park,and providing some reference for the building and transformation of the earthquake site park.
In this paper,a deseription is mainly made of the basic situation of Donghekou earthquake site park,analysis is made of the favorable conditions and unfavorable factors in the landscape transformation, and the guiding idea and the principles are put forward for explaining the main content of plant landscape transformation design of the park,and providing some reference for the building and transformation of the earthquake site park.
2015, 36(3): 147-149.
doi: 10.16779/j.cnki.1003-5508.2015.03.033
Abstract:
2015, 36(3): 150-152,79.
doi: 10.16779/j.cnki.1003-5508.2015.03.034
Abstract:
2015, 36(3): 153-154,101.
doi: 10.16779/j.cnki.1003-5508.2015.03.035
Abstract:
The solar energy insect-killing lamp can effectively trap forestry insects, needing less cost and having no pollution to environments. It is an ideal tool to maintain sustainable development for the forestry and increasing the farmers' income.
The solar energy insect-killing lamp can effectively trap forestry insects, needing less cost and having no pollution to environments. It is an ideal tool to maintain sustainable development for the forestry and increasing the farmers' income.
