2015 Vol. 36 Issue 2
2015 Vol. 36, No. 2
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2015, 36(2): 1-9.
doi: 10.16779/j.cnki.1003-5508.2015.02.001
Abstract:
The evergreen oak(Quercus aquifolioides Rehder & E. H. Wilson) forests are widely distributed in the subalpine zone on the Hengduan Mountains,southwestern China. In order to understand the response of plants to the elevational gradient, studies were made of the plant family composition of Q. aquifolioides community from 15 different sites along an elevational gradient from 2200 to 3600 m. a. s. l. on the Balang Mountain,Wolong Nature Reserve,SW China. The distribution types of Q. aquifolioides community included the world distribution of 31 families,21 families of tropical distribution and 21 families of temperate distribution,respectively,accounting for 42.47%,28.77% and 28.77%. The number of plant families in Quercus aquifolioides communities at low altitudes was more than that at high altitudes. Above 3100 m. a. s. l., the distribution of the number of plant families did not changed. The world distribution families were dominant in each altitudinal gradient, followed by families of tropical and temperate distributions. Tropical distribution families had a decreasing trend with the increasing altitude, temperate distribution families exhibited two peaks with the increasing altitude. From 2 200 m to 2 800 m, tropical and temperate distribution families were basically the same. Temperate distribution increased significantly above 2 900 m. a. s. l..
The evergreen oak(Quercus aquifolioides Rehder & E. H. Wilson) forests are widely distributed in the subalpine zone on the Hengduan Mountains,southwestern China. In order to understand the response of plants to the elevational gradient, studies were made of the plant family composition of Q. aquifolioides community from 15 different sites along an elevational gradient from 2200 to 3600 m. a. s. l. on the Balang Mountain,Wolong Nature Reserve,SW China. The distribution types of Q. aquifolioides community included the world distribution of 31 families,21 families of tropical distribution and 21 families of temperate distribution,respectively,accounting for 42.47%,28.77% and 28.77%. The number of plant families in Quercus aquifolioides communities at low altitudes was more than that at high altitudes. Above 3100 m. a. s. l., the distribution of the number of plant families did not changed. The world distribution families were dominant in each altitudinal gradient, followed by families of tropical and temperate distributions. Tropical distribution families had a decreasing trend with the increasing altitude, temperate distribution families exhibited two peaks with the increasing altitude. From 2 200 m to 2 800 m, tropical and temperate distribution families were basically the same. Temperate distribution increased significantly above 2 900 m. a. s. l..
2015, 36(2): 10-14.
doi: 10.16779/j.cnki.1003-5508.2015.02.002
Abstract:
In wolong nature reserve, Abies faxoniana forests are mainly distributed in moist shade slope or half-shade slope of the mountains with an elevation from 2 700 m to 3 800 m. Abies faxoniana forest could develop a variety of community types, such as Abies faxoniana-Fargesia nitida forest, Abies faxoniana-Yushania brevipaniculata forest, Abies faxoniana-Bashania fangiana forest,Abies faxoniana-Rhododendron faberi sp. prattii forest, Abies faxoniana-Rhododendron kyawii forest and Abies faxoniana-Rhododendron watsonii forest. The height of Abies faxoniana trees decreased with the increasing of the altitude in the same diameter class. The age structures of population of Abies faxoniana were growing types in areas with the elevations of 2 700 m, 2 900 m, 3 100 m and 3 300 m, and a stable type in the area with an elevation of 3 600 m. There were intense interspecific competitions at shrub level. The main competitor of Abies faxoniana population was Fargesia nitida in areas with the elevation from 2 700 m to 3 200 m, and Rhododendron faberi sp. prattii and Rhododendron watsonii in areas with the elevation from 2 700 m to 3 200 m. They all had influence on reproduction and regeneration of Abies faxoniana population. Abies faxoniana population often suffered diseases, insect pests, mammal damage, wind damage and snow disaster, thus resulting in an adverse effect on growth, development and number of Abies faxoniana population.
In wolong nature reserve, Abies faxoniana forests are mainly distributed in moist shade slope or half-shade slope of the mountains with an elevation from 2 700 m to 3 800 m. Abies faxoniana forest could develop a variety of community types, such as Abies faxoniana-Fargesia nitida forest, Abies faxoniana-Yushania brevipaniculata forest, Abies faxoniana-Bashania fangiana forest,Abies faxoniana-Rhododendron faberi sp. prattii forest, Abies faxoniana-Rhododendron kyawii forest and Abies faxoniana-Rhododendron watsonii forest. The height of Abies faxoniana trees decreased with the increasing of the altitude in the same diameter class. The age structures of population of Abies faxoniana were growing types in areas with the elevations of 2 700 m, 2 900 m, 3 100 m and 3 300 m, and a stable type in the area with an elevation of 3 600 m. There were intense interspecific competitions at shrub level. The main competitor of Abies faxoniana population was Fargesia nitida in areas with the elevation from 2 700 m to 3 200 m, and Rhododendron faberi sp. prattii and Rhododendron watsonii in areas with the elevation from 2 700 m to 3 200 m. They all had influence on reproduction and regeneration of Abies faxoniana population. Abies faxoniana population often suffered diseases, insect pests, mammal damage, wind damage and snow disaster, thus resulting in an adverse effect on growth, development and number of Abies faxoniana population.
2015, 36(2): 15-19.
doi: 10.16779/j.cnki.1003-5508.2015.02.003
Abstract:
Studies were made of the distribution of main nutrient elements and biomass of the young Eucalyptus grandis plantation in Shuangliu county in Sichuan province. The results showed that the whole plant fresh weight of the 4-year-old Eucalyptus grandis standard wood was 311.24 kg,while the 5-year-old was 484.02 kg. The ranked order of the biomass distribution of two kinds of Eucalyptus grandis plantation was trunk > bark or big branch > branchlet > leaf > fruit. The distribution regularity of nutrient element content in different organs of the two kinds of Eucalyptus grandis plantations. And its ranked order was leaf > fruit > big branch or branchlet > bark > tree trunk. From the perspective of nutrients and organic matter distribution in the trunk,N,P,K,Mg content presented basically increasing with the trunk height. Organic matter content was the highest in central trunk,while organic matter content of the trunk decreased when the tree height increased. The Ca content in stem base was the highest and the lowest in central trunk. From the aspects of Eucalyptus grandis plantation nutrient accumulation and distribution,the nutrient elemnet accumulation of two kinds of Eucalyptus grandis plantation was proved to be consistent. N accumulation was the highest in the two kinds of plantations,followed by the Ca,K,Mg,P. N content accumulation of four years old Eucalyptus grandis plantation was 637.32 kg·hm-2,while the five years old Eucalyptus grandis plantation was 1 134.17 kg·hm-2.
Studies were made of the distribution of main nutrient elements and biomass of the young Eucalyptus grandis plantation in Shuangliu county in Sichuan province. The results showed that the whole plant fresh weight of the 4-year-old Eucalyptus grandis standard wood was 311.24 kg,while the 5-year-old was 484.02 kg. The ranked order of the biomass distribution of two kinds of Eucalyptus grandis plantation was trunk > bark or big branch > branchlet > leaf > fruit. The distribution regularity of nutrient element content in different organs of the two kinds of Eucalyptus grandis plantations. And its ranked order was leaf > fruit > big branch or branchlet > bark > tree trunk. From the perspective of nutrients and organic matter distribution in the trunk,N,P,K,Mg content presented basically increasing with the trunk height. Organic matter content was the highest in central trunk,while organic matter content of the trunk decreased when the tree height increased. The Ca content in stem base was the highest and the lowest in central trunk. From the aspects of Eucalyptus grandis plantation nutrient accumulation and distribution,the nutrient elemnet accumulation of two kinds of Eucalyptus grandis plantation was proved to be consistent. N accumulation was the highest in the two kinds of plantations,followed by the Ca,K,Mg,P. N content accumulation of four years old Eucalyptus grandis plantation was 637.32 kg·hm-2,while the five years old Eucalyptus grandis plantation was 1 134.17 kg·hm-2.
2015, 36(2): 20-23.
doi: 10.16779/j.cnki.1003-5508.2015.02.004
Abstract:
The seeds of Phoebe zhennan collected from 71 superior individual plants of 15 provenances were sowed by way of container seedling raising. Research work was designed by random blocks and repeated 3 times. Such indexes of different provenances as the height, ground diameter, aboveground biomass and underground biomass of seedlings were studied through variance analysis and multiple comparison method. The results indicated that the seedling height and ground diameter growth of different provenances had a significant difference. There was great difference in individual biomass and the biomass ratio between the underground part and the aboveground part of the different provenances. Through comprehensive evaluation, provenances 7,10,1,2 and 4 performed excellently.
The seeds of Phoebe zhennan collected from 71 superior individual plants of 15 provenances were sowed by way of container seedling raising. Research work was designed by random blocks and repeated 3 times. Such indexes of different provenances as the height, ground diameter, aboveground biomass and underground biomass of seedlings were studied through variance analysis and multiple comparison method. The results indicated that the seedling height and ground diameter growth of different provenances had a significant difference. There was great difference in individual biomass and the biomass ratio between the underground part and the aboveground part of the different provenances. Through comprehensive evaluation, provenances 7,10,1,2 and 4 performed excellently.
2015, 36(2): 24-26.
doi: 10.16779/j.cnki.1003-5508.2015.02.005
Abstract:
In this paper,a new forma of the Bambusa rigida Keng et Keng f. is reported, that is B. rigida Keng et Keng f. f. luteolo-striata Yi et L. Yangi. Its internodes and sheaths are green with light yellow stripes. Its growing area is Changning County, Sichuan. Meanwhile some new combinations of Phyllostachys Sieb. et Zucc are also reported.
In this paper,a new forma of the Bambusa rigida Keng et Keng f. is reported, that is B. rigida Keng et Keng f. f. luteolo-striata Yi et L. Yangi. Its internodes and sheaths are green with light yellow stripes. Its growing area is Changning County, Sichuan. Meanwhile some new combinations of Phyllostachys Sieb. et Zucc are also reported.
2015, 36(2): 27-31.
doi: 10.16779/j.cnki.1003-5508.2015.02.006
Abstract:
Studies were made of the growth characteristics of Idesia polycarpa planted in Ningqiang County of Shanxi province by the stem analysis method. The results showed that the DBH growth of Idesia polycarpa was earlier than the tree height growth. The current annual increment and mean annual increment of DBH almost reached maximum at around 15 years at the same time,while the tree height was later about 5 years. The DBH of fast-growing period was about 10 years to 17 years. The DBH growth entered the overmature period at about 19 years,while the tree height growth was at 22 years,later than DBH growth. The current annual increment of timber volume reached maximum value about 0.009086 m3 at 20 years while the mean annual increment did not yet reach the maximum value. The current annual increment and mean annual increment of timber volume were not intersected before 39 years,namely,without reaching the quantitative maturity. Consequently,its rational rotation was after 39 years. The tree stem of Idesia polycarpa was basically stable at 25 years,and the breast height form factor was about 0.4.
Studies were made of the growth characteristics of Idesia polycarpa planted in Ningqiang County of Shanxi province by the stem analysis method. The results showed that the DBH growth of Idesia polycarpa was earlier than the tree height growth. The current annual increment and mean annual increment of DBH almost reached maximum at around 15 years at the same time,while the tree height was later about 5 years. The DBH of fast-growing period was about 10 years to 17 years. The DBH growth entered the overmature period at about 19 years,while the tree height growth was at 22 years,later than DBH growth. The current annual increment of timber volume reached maximum value about 0.009086 m3 at 20 years while the mean annual increment did not yet reach the maximum value. The current annual increment and mean annual increment of timber volume were not intersected before 39 years,namely,without reaching the quantitative maturity. Consequently,its rational rotation was after 39 years. The tree stem of Idesia polycarpa was basically stable at 25 years,and the breast height form factor was about 0.4.
2015, 36(2): 32-37.
doi: 10.16779/j.cnki.1003-5508.2015.02.007
Abstract:
In order to understand the community ecology process of Fargesia and explore the carring capacity of panda habitat,studies were made of on the biomass distribution pattern of above-ground organs of three kinds of Fargesia and the regression models of each biomass component were also based on BD and culm height. The results showed that:(1) among the above-ground organs, the culm biomass was much more than the branch and leaf biomass. In the culm biomass allocation, Fargesia angustissima > Fargesia nitida > Fargesia scabrida. In the branches biomass allocation,Fargesia scabrida > Fargesia angustissima > Fargesia nitida. In the leaf biomass, Fargesia scabrida > Fargesia nitida > Fargesia angustissima. (2) Various components were highly correlated with BD. The models of fresh culm weight(W1) based on BD of the three Fargesia species were W1=1/[7.761 + (-29.385e-B)](Fargesia angustissima), W1=0.367B2.614(Fargesia nitida), W1=1/[4.804 + (-11.414e-B)](Fargesia scabrida). According to these models the community biomass of those three Fargesia species could be accurately estimated,and thus the carrying capacity of panda habitat could also be estimated.
In order to understand the community ecology process of Fargesia and explore the carring capacity of panda habitat,studies were made of on the biomass distribution pattern of above-ground organs of three kinds of Fargesia and the regression models of each biomass component were also based on BD and culm height. The results showed that:(1) among the above-ground organs, the culm biomass was much more than the branch and leaf biomass. In the culm biomass allocation, Fargesia angustissima > Fargesia nitida > Fargesia scabrida. In the branches biomass allocation,Fargesia scabrida > Fargesia angustissima > Fargesia nitida. In the leaf biomass, Fargesia scabrida > Fargesia nitida > Fargesia angustissima. (2) Various components were highly correlated with BD. The models of fresh culm weight(W1) based on BD of the three Fargesia species were W1=1/[7.761 + (-29.385e-B)](Fargesia angustissima), W1=0.367B2.614(Fargesia nitida), W1=1/[4.804 + (-11.414e-B)](Fargesia scabrida). According to these models the community biomass of those three Fargesia species could be accurately estimated,and thus the carrying capacity of panda habitat could also be estimated.
2015, 36(2): 38-41,9.
doi: 10.16779/j.cnki.1003-5508.2015.02.008
Abstract:
In this paper,taking the young seedlings of Olea europea as experimental materials potted in the greenhouse,the tests of the drought stress were made at the seedling stage,the determination was made of plant height, proline content, Malondialdehyde (MDA) content, the total soluble protein, soluble sugar content,superoxide dismutase(SOD) activity, peroxidase(POD) activity and catalase (CAT) activity. The result showed that after a simulated drought stress, the tree height and chlorophyll content(CC), proline content,total soluble protein and SOD contents had no remarkable change,and the contents of soluble sugar,CAT, MDA and POD rose gradually. It could be concluded that the growth of Olea europea seedlings were negatively influenced by different degree of drought stress,but the protective enzyme system and osmatic adjustment substance could adjust themselves to avoid the drought damage,thus young seedlings had some tolerant ability to drought conditions.
In this paper,taking the young seedlings of Olea europea as experimental materials potted in the greenhouse,the tests of the drought stress were made at the seedling stage,the determination was made of plant height, proline content, Malondialdehyde (MDA) content, the total soluble protein, soluble sugar content,superoxide dismutase(SOD) activity, peroxidase(POD) activity and catalase (CAT) activity. The result showed that after a simulated drought stress, the tree height and chlorophyll content(CC), proline content,total soluble protein and SOD contents had no remarkable change,and the contents of soluble sugar,CAT, MDA and POD rose gradually. It could be concluded that the growth of Olea europea seedlings were negatively influenced by different degree of drought stress,but the protective enzyme system and osmatic adjustment substance could adjust themselves to avoid the drought damage,thus young seedlings had some tolerant ability to drought conditions.
2015, 36(2): 42-47.
doi: 10.16779/j.cnki.1003-5508.2015.02.009
Abstract:
Wasps are rich in species, and have nutritive value and medicinal value,therefore they are precious resources worth utilizing and studying. However, when these wasps are frightened, they will attack their target in groups, and the components of their venom are rich and have a high toxicity. If wasps attack humans or animals, they will bring more harm than bees, so the scientific and effective controlling wasps should be research hotspots. The species, resource value and harm of wasps are summarized in this article. Besides, the research problems of wasps are analyzed, and the research directions of wasps are put forward.
Wasps are rich in species, and have nutritive value and medicinal value,therefore they are precious resources worth utilizing and studying. However, when these wasps are frightened, they will attack their target in groups, and the components of their venom are rich and have a high toxicity. If wasps attack humans or animals, they will bring more harm than bees, so the scientific and effective controlling wasps should be research hotspots. The species, resource value and harm of wasps are summarized in this article. Besides, the research problems of wasps are analyzed, and the research directions of wasps are put forward.
2015, 36(2): 48-50.
doi: 10.16779/j.cnki.1003-5508.2015.02.010
Abstract:
2015, 36(2): 51-54.
doi: 10.16779/j.cnki.1003-5508.2015.02.011
Abstract:
2015, 36(2): 55-59.
doi: 10.16779/j.cnki.1003-5508.2015.02.012
Abstract:
In this paper, forest campus backbone tree species selections in Northern Fujian were taken as the object of study. The biological and ecological characteristics, ornamental tree species characteristics, ecological function were determined as the main basis for tree species selections, and the climate adaptability, soil adaptability, carbon fixation and oxygen release, cooling and humidifying capacity and other 15 criterion level evaluation indexes were also established,then the Yaahp analytic hierarchy model method was used to establish the campus backbone forest tree species for comprehensive evaluations in order to calculate the weight of each index and tree species evaluation scores. The results showed that the tree species in 50 types' forest campus which had been evaluated were divided into 4 grades. Grade I (> 4), the comprehensive characters performed well, with a total number of 10 tree species; Grade Ⅱ (> 3.7, ≤ 4) had a total number of 14 tree species; Grade Ⅲ (> 3.2, ≤ 3.7) had a total number of 20 tree species; Grade Ⅳ(≤ 3.2) had a total number of 6 tree species. This research result would provide reference of backbone tree species' scientific selections for forest campus in Northern Fujian.
In this paper, forest campus backbone tree species selections in Northern Fujian were taken as the object of study. The biological and ecological characteristics, ornamental tree species characteristics, ecological function were determined as the main basis for tree species selections, and the climate adaptability, soil adaptability, carbon fixation and oxygen release, cooling and humidifying capacity and other 15 criterion level evaluation indexes were also established,then the Yaahp analytic hierarchy model method was used to establish the campus backbone forest tree species for comprehensive evaluations in order to calculate the weight of each index and tree species evaluation scores. The results showed that the tree species in 50 types' forest campus which had been evaluated were divided into 4 grades. Grade I (> 4), the comprehensive characters performed well, with a total number of 10 tree species; Grade Ⅱ (> 3.7, ≤ 4) had a total number of 14 tree species; Grade Ⅲ (> 3.2, ≤ 3.7) had a total number of 20 tree species; Grade Ⅳ(≤ 3.2) had a total number of 6 tree species. This research result would provide reference of backbone tree species' scientific selections for forest campus in Northern Fujian.
2015, 36(2): 60-63.
doi: 10.16779/j.cnki.1003-5508.2015.02.013
Abstract:
During the producing way of the current listing of forest resource assents appraisal,there are some main problems in the inventory of forests,such as stand volume,stand age,site quality,stand diameter class structure and forest management measures. In this paper,discussion is made on these problems and their influence. Besides,the corresponding measures and some suggestions of strong practicality are also put foreword.
During the producing way of the current listing of forest resource assents appraisal,there are some main problems in the inventory of forests,such as stand volume,stand age,site quality,stand diameter class structure and forest management measures. In this paper,discussion is made on these problems and their influence. Besides,the corresponding measures and some suggestions of strong practicality are also put foreword.
2015, 36(2): 64-66.
doi: 10.16779/j.cnki.1003-5508.2015.02.014
Abstract:
2015, 36(2): 67-70.
doi: 10.16779/j.cnki.1003-5508.2015.02.015
Abstract:
Sichuan Province forest ecological tourism in recent years has grown steadily, and become a best combined way to do a good job of forest protection and development of forestry economy. This paper describes the concept of forest ecological tourism, analyzes the Sichuan Province forest ecological tourism resource advantages and features of forest ecological tourism,and summarizes the existing products. Besides,according to the situation of Sichuan ecological tourism income of nearly five years,analysis is made of the problems, and the next developmental measures are proposed.
Sichuan Province forest ecological tourism in recent years has grown steadily, and become a best combined way to do a good job of forest protection and development of forestry economy. This paper describes the concept of forest ecological tourism, analyzes the Sichuan Province forest ecological tourism resource advantages and features of forest ecological tourism,and summarizes the existing products. Besides,according to the situation of Sichuan ecological tourism income of nearly five years,analysis is made of the problems, and the next developmental measures are proposed.
2015, 36(2): 71-76.
doi: 10.16779/j.cnki.1003-5508.2015.02.016
Abstract:
Guanwu Mountain Provincial Nature Reserve is located in Jiangyou (county-level city), Sichuan Province. On the basis of field investigations and specimens reference,seudies were made of the seed plant floraes. The results have shown that there are 1 009 species, 519 genera and 128 families of seed plants,among them there are 19 species,12 genera and 6 families belonging to gymnosperms; and 990 species,507 genera and 122 families belonging to angiosperms. There are 39 families belonging to the pantropic category,making up 44.33%, while there are 141 genera belonging to the north temperate categpru,making up 29.81%. The flora of Guanwu Mountain Provincial Nature Reserve is characterized by the transition category from tropical to north temperate zones.
Guanwu Mountain Provincial Nature Reserve is located in Jiangyou (county-level city), Sichuan Province. On the basis of field investigations and specimens reference,seudies were made of the seed plant floraes. The results have shown that there are 1 009 species, 519 genera and 128 families of seed plants,among them there are 19 species,12 genera and 6 families belonging to gymnosperms; and 990 species,507 genera and 122 families belonging to angiosperms. There are 39 families belonging to the pantropic category,making up 44.33%, while there are 141 genera belonging to the north temperate categpru,making up 29.81%. The flora of Guanwu Mountain Provincial Nature Reserve is characterized by the transition category from tropical to north temperate zones.
2015, 36(2): 77-80.
doi: 10.16779/j.cnki.1003-5508.2015.02.017
Abstract:
The rocky desertification is compared to the ecological cancer of the earth. It will result in severe adverse consequences, such as land resource depletion and a series natural disasters. Comprehensive treatment engineering has been carried out in karst areas in southwestern Sichuan from 2008. In this paper,investigations were made on rocky desertification of 5 southwestern counties in this zone and studies were made of the governance modes of the rocky desertification by monitoring plant diversity and soil indicators. The research results were useful to providing reference on vegetation restoration patterns and species selection in rocky desertification regions.
The rocky desertification is compared to the ecological cancer of the earth. It will result in severe adverse consequences, such as land resource depletion and a series natural disasters. Comprehensive treatment engineering has been carried out in karst areas in southwestern Sichuan from 2008. In this paper,investigations were made on rocky desertification of 5 southwestern counties in this zone and studies were made of the governance modes of the rocky desertification by monitoring plant diversity and soil indicators. The research results were useful to providing reference on vegetation restoration patterns and species selection in rocky desertification regions.
2015, 36(2): 81-85.
doi: 10.16779/j.cnki.1003-5508.2015.02.018
Abstract:
In order to find out the distribution characteristics of the pests to Zanthoxyhum bungeanum at time-spatial levels in Xiaozhaizigou Nature Reserve, Beichuan County, the species and damage degree of Z. bungeanum were investigated in May and July at three spatial levels (lower, medium and high), which were decided by the altitude. The results showed that the Z. bungeanum trees in all sample plots were harmed by Z. bungeanum pests and the damaged degree was serious at all time levels and spatial levels. The damaged degree of Z. bungeanum trees caused by Z. bungeanum pests would gradually reduce with the increase of the altitude and the total damaged degree caused by all pests was no difference in May and July. The difference of damaged degree caused by different pests was significant at time and spatial levels. The main Z. bungeanum pests were Clytus validus, Asphondylia zathoyli and Agrilus zanthoxylumi, and the damage degree of other pests such as Samia cynthia, Pseudaulacaspis pentagona and Tetranychus viennensis etc. was relatively light.
In order to find out the distribution characteristics of the pests to Zanthoxyhum bungeanum at time-spatial levels in Xiaozhaizigou Nature Reserve, Beichuan County, the species and damage degree of Z. bungeanum were investigated in May and July at three spatial levels (lower, medium and high), which were decided by the altitude. The results showed that the Z. bungeanum trees in all sample plots were harmed by Z. bungeanum pests and the damaged degree was serious at all time levels and spatial levels. The damaged degree of Z. bungeanum trees caused by Z. bungeanum pests would gradually reduce with the increase of the altitude and the total damaged degree caused by all pests was no difference in May and July. The difference of damaged degree caused by different pests was significant at time and spatial levels. The main Z. bungeanum pests were Clytus validus, Asphondylia zathoyli and Agrilus zanthoxylumi, and the damage degree of other pests such as Samia cynthia, Pseudaulacaspis pentagona and Tetranychus viennensis etc. was relatively light.
2015, 36(2): 86-90,26.
doi: 10.16779/j.cnki.1003-5508.2015.02.019
Abstract:
2015, 36(2): 91-94.
doi: 10.16779/j.cnki.1003-5508.2015.02.020
Abstract:
Wolong National Nature Reserve was severely affected by Mao County-Wenchuan fracture control and Wenchuan earthquake on May 12,2008. The main types of its geological disasters were collapses, landslides, mudslides,and unstable slopes. The agency compiled the measured data about 159 geological disaster spots of Wolong Reserve in April 2013, including 17 landslides, 80 collapses, 42 mudslides, and 20 unstable slopes. The geological disaster risk analysis showed that 6 727 people and 261.95 million yuan property were threatened by the geological disasters. The geological disasters were mainly distributed along the Pitiao River shore, and became graolually serious from Dengsheng Ditch to Water Dividing Board. At the same time, few recommendations were put forward about the disaster prevention and control based on geological disasters characteristics.
Wolong National Nature Reserve was severely affected by Mao County-Wenchuan fracture control and Wenchuan earthquake on May 12,2008. The main types of its geological disasters were collapses, landslides, mudslides,and unstable slopes. The agency compiled the measured data about 159 geological disaster spots of Wolong Reserve in April 2013, including 17 landslides, 80 collapses, 42 mudslides, and 20 unstable slopes. The geological disaster risk analysis showed that 6 727 people and 261.95 million yuan property were threatened by the geological disasters. The geological disasters were mainly distributed along the Pitiao River shore, and became graolually serious from Dengsheng Ditch to Water Dividing Board. At the same time, few recommendations were put forward about the disaster prevention and control based on geological disasters characteristics.
2015, 36(2): 95-97.
doi: 10.16779/j.cnki.1003-5508.2015.02.021
Abstract:
Investigations were made on the effect of N,P,K fertilizers on the seedling growth in the Cunninghamia lanceolata seedling stage. The result showed that the fertilization could significantly promote the ground diameter and height of Cunninghamia lanceolata seedlings,but it was needed to combine N,P and K fertilizers. The effect of the single application of N fertilizer was poor as compared with the combined application of N,P and K fertilizers. Different fertilization treatmerts had significant differences. The effect of different treatments also reached a very significant difference in Cunninghamia lanceolata seedling ground diameter and seedling height growth. The formula of the most reasonable fertilizers was N 1.5 g, P 5 g, K 1.5 g. The seedling height was higher by 38.8%, the diameter was higher by 46% than the control, thus able to be popularized in the production. The formula of the fertilization N 1.5 g was the worst,its seedling height was higher by 17.4% and the diameter was higher by 20% than the control.
Investigations were made on the effect of N,P,K fertilizers on the seedling growth in the Cunninghamia lanceolata seedling stage. The result showed that the fertilization could significantly promote the ground diameter and height of Cunninghamia lanceolata seedlings,but it was needed to combine N,P and K fertilizers. The effect of the single application of N fertilizer was poor as compared with the combined application of N,P and K fertilizers. Different fertilization treatmerts had significant differences. The effect of different treatments also reached a very significant difference in Cunninghamia lanceolata seedling ground diameter and seedling height growth. The formula of the most reasonable fertilizers was N 1.5 g, P 5 g, K 1.5 g. The seedling height was higher by 38.8%, the diameter was higher by 46% than the control, thus able to be popularized in the production. The formula of the fertilization N 1.5 g was the worst,its seedling height was higher by 17.4% and the diameter was higher by 20% than the control.
2015, 36(2): 98-101,14.
doi: 10.16779/j.cnki.1003-5508.2015.02.022
Abstract:
A potted experiment with controlled fertilization supply was conducted to study the effects of different phosphorus-applying levels (P0, 0 kg P·hm-2; PL, 42 kg P·hm-2; PM, 84 kg P·hm-2; PH, 168 kg P·hm-2) on the growth of seedlings and camptothecin (CPT) accumulation in C. acuminata seedlings. The experiment results showed that the height and dry weight of C. acuminata seedlings would increase when phosphorus-applying level increased. Under different levels of applying phosphorus, the dry weight of leaf, shoot and root of C. acuminata seedlings was significantly different (p < 0.05). The CPT content in leaf, shoot and root reached the highest level when phosphorus-applying level was P L. Compared with P0, the CPT content in PL increased significantly. The CPT amount in the whole seedling, leaf and shoot of C. acuminata increased gradually with the increase of phosphorus. But when phosphorus-applying level was higher than PM, the increase of CPT amount was insignificant. The CPT amount in root reached the highest level when phosphorus-applying level was PM. According to the results studied, proper deficient phosphorus stress could significantly enhance CPT content in C. acuminata seedlings. With a main objective to establish a C. acuminata seedling plantation for producing CPT, proper phosphorus level was PM. CPT amount in seedlings was mainly decided by the accumulation of biomass of C. acuminata.
A potted experiment with controlled fertilization supply was conducted to study the effects of different phosphorus-applying levels (P0, 0 kg P·hm-2; PL, 42 kg P·hm-2; PM, 84 kg P·hm-2; PH, 168 kg P·hm-2) on the growth of seedlings and camptothecin (CPT) accumulation in C. acuminata seedlings. The experiment results showed that the height and dry weight of C. acuminata seedlings would increase when phosphorus-applying level increased. Under different levels of applying phosphorus, the dry weight of leaf, shoot and root of C. acuminata seedlings was significantly different (p < 0.05). The CPT content in leaf, shoot and root reached the highest level when phosphorus-applying level was P L. Compared with P0, the CPT content in PL increased significantly. The CPT amount in the whole seedling, leaf and shoot of C. acuminata increased gradually with the increase of phosphorus. But when phosphorus-applying level was higher than PM, the increase of CPT amount was insignificant. The CPT amount in root reached the highest level when phosphorus-applying level was PM. According to the results studied, proper deficient phosphorus stress could significantly enhance CPT content in C. acuminata seedlings. With a main objective to establish a C. acuminata seedling plantation for producing CPT, proper phosphorus level was PM. CPT amount in seedlings was mainly decided by the accumulation of biomass of C. acuminata.
2015, 36(2): 102-104.
doi: 10.16779/j.cnki.1003-5508.2015.02.023
Abstract:
2015, 36(2): 105-107,37.
doi: 10.16779/j.cnki.1003-5508.2015.02.024
Abstract:
Researches on developing seedling raising cultivation of Alnus nepalensis and Betula alnoides and establishing of 27 hm2 hectares of demonstration forest were conducted by using "Aluns nepalensis of Yunnan No. 1", "Aluns nepalensis of Yunnan No. 2" and "Betula alnoides of Pu,er No 1" as the seed source in Mangzhang township of Yingjiang County of Dehong Prefecture. In planting experiment fields, sample plots were set on the different slopes at the same elevation and the work was repeated 3 times,and researches were conducted on the effect of the different slope directions on the growth of "Aluns nepalensis of Yunnan No. 1", "Aluns nepalensis of Yunnan No. 2" and "Betula alnoides of Pu,er No 1". The tree height and diameter were measured after one year of afforestation,and the multiple comparison method was used. The results showed that the slope direction had a significant effect on the tree height and diameter of each species. In the seedling growth period,the growth on the shady slope was better than that on the sunny slope.
Researches on developing seedling raising cultivation of Alnus nepalensis and Betula alnoides and establishing of 27 hm2 hectares of demonstration forest were conducted by using "Aluns nepalensis of Yunnan No. 1", "Aluns nepalensis of Yunnan No. 2" and "Betula alnoides of Pu,er No 1" as the seed source in Mangzhang township of Yingjiang County of Dehong Prefecture. In planting experiment fields, sample plots were set on the different slopes at the same elevation and the work was repeated 3 times,and researches were conducted on the effect of the different slope directions on the growth of "Aluns nepalensis of Yunnan No. 1", "Aluns nepalensis of Yunnan No. 2" and "Betula alnoides of Pu,er No 1". The tree height and diameter were measured after one year of afforestation,and the multiple comparison method was used. The results showed that the slope direction had a significant effect on the tree height and diameter of each species. In the seedling growth period,the growth on the shady slope was better than that on the sunny slope.
2015, 36(2): 108-112.
doi: 10.16779/j.cnki.1003-5508.2015.02.025
Abstract:
The research was conducted on the growth characteristics of the Toona sinensis plantation in Pengxi county in Sichuan province by using the stem analysis method. The results showed that the DBH, tree height and tree volume growth of the 27-year-old Toona sinensis plantation were 38.2 cm, 22.3 m and 0.9874 m3,respectively. Their mean annual increment were 1.41 cm, 0.83 m and 0.03624 m3. The current annual increment and mean annual increment of timber volume reached maximumat at the age of 15 and 24, and they intersected at the age of about 26, which meant that the Toona sinensis growth process had reached its quantitative maturity at the age of 26. The tree form was basically steady at the age of about 15. The growth dynamic models of DBH,height and volume of Toona sinensiswere established with the Logistic Equation. Three regression equations were:y=40.1890/(1 + 5.4884×e-0.1719x), y=22.2083/(1 + 7.3383×e-0.2352x) and y=1.0785/(1 + 27.0171×e-0.2010x), and the correlation coefficients of fitting curve(R2) were 0.9782, 0.9722 and 0.9975.
The research was conducted on the growth characteristics of the Toona sinensis plantation in Pengxi county in Sichuan province by using the stem analysis method. The results showed that the DBH, tree height and tree volume growth of the 27-year-old Toona sinensis plantation were 38.2 cm, 22.3 m and 0.9874 m3,respectively. Their mean annual increment were 1.41 cm, 0.83 m and 0.03624 m3. The current annual increment and mean annual increment of timber volume reached maximumat at the age of 15 and 24, and they intersected at the age of about 26, which meant that the Toona sinensis growth process had reached its quantitative maturity at the age of 26. The tree form was basically steady at the age of about 15. The growth dynamic models of DBH,height and volume of Toona sinensiswere established with the Logistic Equation. Three regression equations were:y=40.1890/(1 + 5.4884×e-0.1719x), y=22.2083/(1 + 7.3383×e-0.2352x) and y=1.0785/(1 + 27.0171×e-0.2010x), and the correlation coefficients of fitting curve(R2) were 0.9782, 0.9722 and 0.9975.
2015, 36(2): 113-115.
doi: 10.16779/j.cnki.1003-5508.2015.02.026
Abstract:
Cutting propagation experiment of Cassia surattensis was conducted in the nursery of Puer Forestry Institute. With ABT 1 as the treatment agent, five concentrations were designed such as 500,1 000, 1 500 mg per litre,2 000 mg·L-1 and CK. Single factor and four-level experiments were made by the rapid dipping way. The result showed that the concentration of highest survival rate of cutting was 1 500 mg per litre,reaching 78.9%. The survival rate of cutting of CK was 54.4%.
Cutting propagation experiment of Cassia surattensis was conducted in the nursery of Puer Forestry Institute. With ABT 1 as the treatment agent, five concentrations were designed such as 500,1 000, 1 500 mg per litre,2 000 mg·L-1 and CK. Single factor and four-level experiments were made by the rapid dipping way. The result showed that the concentration of highest survival rate of cutting was 1 500 mg per litre,reaching 78.9%. The survival rate of cutting of CK was 54.4%.
2015, 36(2): 116-117.
doi: 10.16779/j.cnki.1003-5508.2015.02.027
Abstract:
In order to clarify the effect of medium ratio and cutting time on the survival rate of summerwood cuttings of Eucalyptus grandis,researches were conducted by randomized block experimental design. The results showed that effect of the matrix 1 was the best, the cutting survival rate was 61.78% and the season had significant effects on the survival rate of cuttage. The survival rate was the highest in spring and the lowest in summer. The survival rate in autumn was between the former two seasons.
In order to clarify the effect of medium ratio and cutting time on the survival rate of summerwood cuttings of Eucalyptus grandis,researches were conducted by randomized block experimental design. The results showed that effect of the matrix 1 was the best, the cutting survival rate was 61.78% and the season had significant effects on the survival rate of cuttage. The survival rate was the highest in spring and the lowest in summer. The survival rate in autumn was between the former two seasons.
2015, 36(2): 118-121,50.
doi: 10.16779/j.cnki.1003-5508.2015.02.028
Abstract:
In this paper,by using the fresh pollen from four blueberry varieties,studies were made of the pollen number and pollen germination rate of their flowers with the methods of cellulose and isolated culture medium. The results showed that the pollen numbers were different,the average of single anther from four varieties was respectively 127,546,216 and 144. The kinds of medium and the temperature significantly affected the pollen germination rate. The proper sucrose concentration for pollen germination of blueberry was 20% and the boric acid could promote the pollen germination. But if its concentration was too high,it would show an inhibition effect on the germination. The pollen germination was the highest when the boric acid concentration was 300 μg·L-1. The pollen germination rate was higher when the experiment was carried out at 25℃.
In this paper,by using the fresh pollen from four blueberry varieties,studies were made of the pollen number and pollen germination rate of their flowers with the methods of cellulose and isolated culture medium. The results showed that the pollen numbers were different,the average of single anther from four varieties was respectively 127,546,216 and 144. The kinds of medium and the temperature significantly affected the pollen germination rate. The proper sucrose concentration for pollen germination of blueberry was 20% and the boric acid could promote the pollen germination. But if its concentration was too high,it would show an inhibition effect on the germination. The pollen germination was the highest when the boric acid concentration was 300 μg·L-1. The pollen germination rate was higher when the experiment was carried out at 25℃.
2015, 36(2): 122-126.
doi: 10.16779/j.cnki.1003-5508.2015.02.029
Abstract:
Parocneria orienta is one of the most serious pests to the forest of Sichuan province. It has caused severe economic losses in Sichuan. This paper deals with the research advances of several control methods, including physical control, chemical control, biological control and chemical ecology control, and then forecasts the studies of Parocneria orienta.
Parocneria orienta is one of the most serious pests to the forest of Sichuan province. It has caused severe economic losses in Sichuan. This paper deals with the research advances of several control methods, including physical control, chemical control, biological control and chemical ecology control, and then forecasts the studies of Parocneria orienta.
2015, 36(2): 127-128,85.
doi: 10.16779/j.cnki.1003-5508.2015.02.030
Abstract:
