2019 Vol. 40 Issue 1
2019 Vol. 40, No. 1
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2019, 40(1): 1-4.
doi: 10.16779/j.cnki.1003-5508.2019.01.001
Abstract:
Based on the field survey of Keteleeria fortunei population,a rare and valuable plant species in Changle District,Fuzhou City,the life table and survival analysis of this population were explored to study the dynamic population variation.The results showed that medium trees formed the largest K.fortunei population,followed by the large trees,while the small trees formed the smallest population in Changle City.Meanwhile,the population survival curve was a concave one,which tended to Deevey type Ⅲ,representing as a decline population.The trend of mortality rate and risk rate in K.fortunei population was basically similar.The early mortality rate of K.fortunei population was high,while the population mortality rate was relatively low at the age of VI.The population survival curve showed that the K.fortunei population decreased rapidly in early age period,stable in middle age period,and declined in old age period.
Based on the field survey of Keteleeria fortunei population,a rare and valuable plant species in Changle District,Fuzhou City,the life table and survival analysis of this population were explored to study the dynamic population variation.The results showed that medium trees formed the largest K.fortunei population,followed by the large trees,while the small trees formed the smallest population in Changle City.Meanwhile,the population survival curve was a concave one,which tended to Deevey type Ⅲ,representing as a decline population.The trend of mortality rate and risk rate in K.fortunei population was basically similar.The early mortality rate of K.fortunei population was high,while the population mortality rate was relatively low at the age of VI.The population survival curve showed that the K.fortunei population decreased rapidly in early age period,stable in middle age period,and declined in old age period.
2019, 40(1): 5-14.
doi: 10.16779/j.cnki.1003-5508.2019.01.002
Abstract:
Evaluating shade-tolerance of wild flower plants contributed to effective introduction and cultivation as well as reasonable utilization of plant resources.In this study,the wild ornamental plant (Impatiens oxyanthera) was grown in two different light environments (unshading and shading at (26.242±1.029)% with black shading net) in E'mei Mountain for about 4 months.The morphological,and gaseous exchange characteristics were measured and photosynthetic-light curve parameters were calculated.The results showed that shading significantly promoted the growth of I.oxyanthera,which increased plant height,base diameter,branch number,crown width,single leaf area,leaf length and width.Shading significantly reduced net photosynthetic rate due to the decrease of the transpiration rates and stomatal conductance,but had no obvious effect on the other gas exchange traits,such as intercellular CO2 concentration,water use efficiency and stomatal limit.In addition,shading significantly increased apparent quantum yield by 69.841%.The comprehensive evaluation of shade-tolerance of I.oxyanthera showed that average comprehensive evaluation value was 0.407 by principal component analysis and subordinate function method.This suggested that I.oxyanthera had a good resistance to shade,and could adapt to low light environment through improving single leaf area to make up for the reduction of net photosynthetic rate per unit area and increasing apparent quantum yield.Higher shade-tolerance would have an important application value for garden-plant scenery and greening at the shading areas of buildings.
Evaluating shade-tolerance of wild flower plants contributed to effective introduction and cultivation as well as reasonable utilization of plant resources.In this study,the wild ornamental plant (Impatiens oxyanthera) was grown in two different light environments (unshading and shading at (26.242±1.029)% with black shading net) in E'mei Mountain for about 4 months.The morphological,and gaseous exchange characteristics were measured and photosynthetic-light curve parameters were calculated.The results showed that shading significantly promoted the growth of I.oxyanthera,which increased plant height,base diameter,branch number,crown width,single leaf area,leaf length and width.Shading significantly reduced net photosynthetic rate due to the decrease of the transpiration rates and stomatal conductance,but had no obvious effect on the other gas exchange traits,such as intercellular CO2 concentration,water use efficiency and stomatal limit.In addition,shading significantly increased apparent quantum yield by 69.841%.The comprehensive evaluation of shade-tolerance of I.oxyanthera showed that average comprehensive evaluation value was 0.407 by principal component analysis and subordinate function method.This suggested that I.oxyanthera had a good resistance to shade,and could adapt to low light environment through improving single leaf area to make up for the reduction of net photosynthetic rate per unit area and increasing apparent quantum yield.Higher shade-tolerance would have an important application value for garden-plant scenery and greening at the shading areas of buildings.
2019, 40(1): 15-19.
doi: 10.16779/j.cnki.1003-5508.2019.01.003
Abstract:
In order to compare the antioxidant properties of three walnut by-product polyphenol extracts,walnut green skin,walnut protein and walnut shells were used as raw materials,the extraction rate of polyphenols and the reducing power were measured together with the removal rate of DPPH free radicals,hydroxyl radicals and superoxide anion radicals,by ultrasonic extraction with water and different proportions of methanol and ethanol.The results showed that the extraction rate of polyphenols was the highest by using 40% ethanol as the extracting agent.The three kinds of walnut by-product polyphenol extracts had anti-oxidation ability in vitro,and the order showed as walnut green skin > walnut protein > walnut shell. The alcohol extract of the walnut green skin had good antioxidant properties and thus could be an antioxidant.
In order to compare the antioxidant properties of three walnut by-product polyphenol extracts,walnut green skin,walnut protein and walnut shells were used as raw materials,the extraction rate of polyphenols and the reducing power were measured together with the removal rate of DPPH free radicals,hydroxyl radicals and superoxide anion radicals,by ultrasonic extraction with water and different proportions of methanol and ethanol.The results showed that the extraction rate of polyphenols was the highest by using 40% ethanol as the extracting agent.The three kinds of walnut by-product polyphenol extracts had anti-oxidation ability in vitro,and the order showed as walnut green skin > walnut protein > walnut shell. The alcohol extract of the walnut green skin had good antioxidant properties and thus could be an antioxidant.
2019, 40(1): 20-24,47.
doi: 10.16779/j.cnki.1003-5508.2019.01.004
Abstract:
In order to provide theoretical basis of tree selection for vegetation restoration, 10 tree species were chosen for measuring and comparing their photosynthetic, Chlorophyll fluorescence and water physiological characteristics in the dry valley of the Minjiang River. The result revealed the drought resistance characteristics of various plants by analyzing the photosynthetic operation, photosynthetic physiological characteristics, water physiological characteristics and correlations of different plants in arid regions.
In order to provide theoretical basis of tree selection for vegetation restoration, 10 tree species were chosen for measuring and comparing their photosynthetic, Chlorophyll fluorescence and water physiological characteristics in the dry valley of the Minjiang River. The result revealed the drought resistance characteristics of various plants by analyzing the photosynthetic operation, photosynthetic physiological characteristics, water physiological characteristics and correlations of different plants in arid regions.
2019, 40(1): 25-29.
doi: 10.16779/j.cnki.1003-5508.2019.01.005
Abstract:
In order to evaluate characters of soil carbon and alkaline nitrogen in urban green lands, investigations were made on soil organic carbon,alkaline nitrogen and their vertical distribution characteristics and correlation in unban green lands(park, road, residential land and campus) in Changchun City.The results showed that soil physical and chemical properties, organic carbon(SOC) and alkalinity nitrogen(AN) content were significantly influenced by green space type and soil profile(P<0.05).The mean values of soil pH in 0~30 cm soil depth under different green lands were:campus > road > residential land > park;The mean values of soil SOC in 0~30 cm soil depth under different green lands were:park > road > residential land > campus;The mean values of soil AN in 0~30 cm soil depth under different green lands were:park > residential land > campus > road;Correlation analysis showed that soil SOC was positively correlated with AN,while green soil pH was negatively correlated with SOC content. This led to the conclusion that the alkalysis nitrogen content should be increased in the soil,and the soil pH should be adjusted to optimize the soil, increase the carbon sequestration, weaken the greenhouse effect and improve the ecological environment.
In order to evaluate characters of soil carbon and alkaline nitrogen in urban green lands, investigations were made on soil organic carbon,alkaline nitrogen and their vertical distribution characteristics and correlation in unban green lands(park, road, residential land and campus) in Changchun City.The results showed that soil physical and chemical properties, organic carbon(SOC) and alkalinity nitrogen(AN) content were significantly influenced by green space type and soil profile(P<0.05).The mean values of soil pH in 0~30 cm soil depth under different green lands were:campus > road > residential land > park;The mean values of soil SOC in 0~30 cm soil depth under different green lands were:park > road > residential land > campus;The mean values of soil AN in 0~30 cm soil depth under different green lands were:park > residential land > campus > road;Correlation analysis showed that soil SOC was positively correlated with AN,while green soil pH was negatively correlated with SOC content. This led to the conclusion that the alkalysis nitrogen content should be increased in the soil,and the soil pH should be adjusted to optimize the soil, increase the carbon sequestration, weaken the greenhouse effect and improve the ecological environment.
2019, 40(1): 30-34.
doi: 10.16779/j.cnki.1003-5508.2019.01.006
Abstract:
To study the forest ecosystem service in different stages of forest transformation, Pinus massoniana forest was selected together with early, middle and late stages of transformed forest communities. The value of forest ecosystem services were evaluated according to the national standard of Specifications for assessment of forest ecosystem services in China (LY/T 1721-2008).The results showed that:(1) The unit value of forest ecosystem services were 76.5 thousand,75.1 thousand yuan,84.0 thousand yuan and 104.7 thousand yuan·hm-2·a-1,respectively in P. massoniana forest,sapling forest,mid-maturation forest and near-mature forest of C. camphora. (2) In the process of transforming P. massoniana forest into mixed forest of P.massoniana and C.camphora,forest ecosystem service was lower in early stage of forest transformation than that in P. massoniana forest because C.camphora was in the shrub layer.Then forest ecosystem services improved significantly as time went by.(3) In the process of P.massoniana forest management,mixed forests should be create and the operating period should be increased in sapling forest,mid-maturation forest in order to improve forest ecosystem service function.
To study the forest ecosystem service in different stages of forest transformation, Pinus massoniana forest was selected together with early, middle and late stages of transformed forest communities. The value of forest ecosystem services were evaluated according to the national standard of Specifications for assessment of forest ecosystem services in China (LY/T 1721-2008).The results showed that:(1) The unit value of forest ecosystem services were 76.5 thousand,75.1 thousand yuan,84.0 thousand yuan and 104.7 thousand yuan·hm-2·a-1,respectively in P. massoniana forest,sapling forest,mid-maturation forest and near-mature forest of C. camphora. (2) In the process of transforming P. massoniana forest into mixed forest of P.massoniana and C.camphora,forest ecosystem service was lower in early stage of forest transformation than that in P. massoniana forest because C.camphora was in the shrub layer.Then forest ecosystem services improved significantly as time went by.(3) In the process of P.massoniana forest management,mixed forests should be create and the operating period should be increased in sapling forest,mid-maturation forest in order to improve forest ecosystem service function.
2019, 40(1): 35-38,65.
doi: 10.16779/j.cnki.1003-5508.2019.01.007
Abstract:
Poplar and willow belong to salicaceae plants,both of them were widely used in economic forest,urban afforestation and roadside.Rust was one of the serious diseases that harmed the salicaceae plants,especially in high density planting nursery and pieces of timber forests. The aims of this study was to compare the differences of symptoms,epidemic characteristics and pathological characteristics between the poplar rust and willow rust,and to provide a theoretical and practical guidance for the prevention and treatment of the disease. The field study was carried out in Northeastern Sichuan (including Gaoping district and Xichong county of Nanchong,Qianfeng district and Wusheng country of Guang'an).Epidemiological investigation and microscopic observation technology were adopted in this study.Most of the pathogenic bacteria affected the leaves and seedlings of the poplar and willow,caused leaves to fall off early and the seedlings to wither. But the pathogenic bacteria was Melampsora larici populina (Melampsora larici-populins) for poplar rust; for willow rust,it was Melampsora larici the Hemicriconemoides (Melampsora coleosporioides Diet.).Though there were several same characters between the poplar and willow rust,they were different in the aspects of the symptoms,pathogenic types and occurrence regularity of the disease.It is advised that pertinent prevention and treatment should be chosen according to the different hosts.
Poplar and willow belong to salicaceae plants,both of them were widely used in economic forest,urban afforestation and roadside.Rust was one of the serious diseases that harmed the salicaceae plants,especially in high density planting nursery and pieces of timber forests. The aims of this study was to compare the differences of symptoms,epidemic characteristics and pathological characteristics between the poplar rust and willow rust,and to provide a theoretical and practical guidance for the prevention and treatment of the disease. The field study was carried out in Northeastern Sichuan (including Gaoping district and Xichong county of Nanchong,Qianfeng district and Wusheng country of Guang'an).Epidemiological investigation and microscopic observation technology were adopted in this study.Most of the pathogenic bacteria affected the leaves and seedlings of the poplar and willow,caused leaves to fall off early and the seedlings to wither. But the pathogenic bacteria was Melampsora larici populina (Melampsora larici-populins) for poplar rust; for willow rust,it was Melampsora larici the Hemicriconemoides (Melampsora coleosporioides Diet.).Though there were several same characters between the poplar and willow rust,they were different in the aspects of the symptoms,pathogenic types and occurrence regularity of the disease.It is advised that pertinent prevention and treatment should be chosen according to the different hosts.
2019, 40(1): 39-42.
doi: 10.16779/j.cnki.1003-5508.2019.01.008
Abstract:
The analytic hierarchy process (AHP) was used to establish the 3th grade index comprehensive evaluation model by 15 evaluation indexes of ecological adaptability,ornamental value,resistance and ecological benefits for 40 varieties of common green plants in Cangxi County.And 18 tree species were found to adapt to the local ecological environment such as Lagerstroemia,Osmanthus and Cinnamomum, which had a certain reference for local tree species selection..
The analytic hierarchy process (AHP) was used to establish the 3th grade index comprehensive evaluation model by 15 evaluation indexes of ecological adaptability,ornamental value,resistance and ecological benefits for 40 varieties of common green plants in Cangxi County.And 18 tree species were found to adapt to the local ecological environment such as Lagerstroemia,Osmanthus and Cinnamomum, which had a certain reference for local tree species selection..
2019, 40(1): 43-47.
doi: 10.16779/j.cnki.1003-5508.2019.01.009
Abstract:
A comparative study was carried out to estimate the effect of covering by different materials (chaff + chicken manure+rice straw,traditionally used,represented by F1;chaff+chicken manure+sorghum straw and bamboo liquor brewing residue+chicken manure+sorghum straw, newly tried,represented by F2 and F3,respectively) on bamboo shoot emergence,size, yield and economic benefit in a Moso bamboo forest.The control was free of any covering materials (F0). The results showed that 1) shoot emergence was promoted by three covering modes to different extent,exactly,F2 and F3 were superior to F1,about 20%,18% and 4.5% higher than control,respectively, in terms of the percentage of shoots sprouted before March 20th;2) shoot heights at F2 and F3 surpassed that at F0 markedly,and slight effect was analyzed for F1,but all covering modes increased the basal diameter of shoots significantly; 3) the superiority of F1 was a higher shoot amount per stand area relative to the other two covering modes,the ultimate shoot yield of F1,F2 and F3was investigated to be 2.5,1.9 and 1.6 times that at F0,and economic benefit was evaluated to be 2.5, 2.2 and 1.8 times that at F0 respectively.Thus,it was recommended to cover Moso bamboo forests by any available agricultural or forestry residues nearby in mountain areas, beneficial to cost saving, income increase and recycling of resources simultaneously.
A comparative study was carried out to estimate the effect of covering by different materials (chaff + chicken manure+rice straw,traditionally used,represented by F1;chaff+chicken manure+sorghum straw and bamboo liquor brewing residue+chicken manure+sorghum straw, newly tried,represented by F2 and F3,respectively) on bamboo shoot emergence,size, yield and economic benefit in a Moso bamboo forest.The control was free of any covering materials (F0). The results showed that 1) shoot emergence was promoted by three covering modes to different extent,exactly,F2 and F3 were superior to F1,about 20%,18% and 4.5% higher than control,respectively, in terms of the percentage of shoots sprouted before March 20th;2) shoot heights at F2 and F3 surpassed that at F0 markedly,and slight effect was analyzed for F1,but all covering modes increased the basal diameter of shoots significantly; 3) the superiority of F1 was a higher shoot amount per stand area relative to the other two covering modes,the ultimate shoot yield of F1,F2 and F3was investigated to be 2.5,1.9 and 1.6 times that at F0,and economic benefit was evaluated to be 2.5, 2.2 and 1.8 times that at F0 respectively.Thus,it was recommended to cover Moso bamboo forests by any available agricultural or forestry residues nearby in mountain areas, beneficial to cost saving, income increase and recycling of resources simultaneously.
2019, 40(1): 48-51.
doi: 10.16779/j.cnki.1003-5508.2019.01.010
Abstract:
An investigation was conducted on Sorbus in Sichuan according to documentary records and specimens.The results showed that there lived 12 species of Sorbus including 4 endemic species to Sichuan and 3 newly recorded species.Certain species of Sorbus were found in a large altitude range and a wide variety of habitats,which indicated internal potential against various environments and possibilities for breeding and applying.
An investigation was conducted on Sorbus in Sichuan according to documentary records and specimens.The results showed that there lived 12 species of Sorbus including 4 endemic species to Sichuan and 3 newly recorded species.Certain species of Sorbus were found in a large altitude range and a wide variety of habitats,which indicated internal potential against various environments and possibilities for breeding and applying.
2019, 40(1): 52-55.
doi: 10.16779/j.cnki.1003-5508.2019.01.011
Abstract:
Analysis was made of the growth performance and nuts' economic traits of the nine walnut cultivars in Guangyuan city.The results showed that (1) these cultivars had strong growth potential and high,stable yield characteristics.This area boasted an abundance of useful walnut varieties,so there was still a large space for characteristic variety development.(2) These walnut cultivars were appropriate in shapes and nut shell thickness with degraded and membranous diaphragm.Most of the nut shells were easily broken for kernel-taking with a high yield of kernels.Walnut cultivars with big nuts,high kernels-taking rate and storage stability should be chosen for variety extension,such as Shuchao 2,Qingchuan 1,Wanghe 1.(3) The coefficients of variation were low in average walnut diameter,crude fat content and kernel yield,which showed high genetic stabilities of these indicators;(4) there was a significant correlation among the weight of single walnut,the average walnut diameter,shell thickness,kernel,crude fat content and crude protein content.The correlation had a certain guiding significance for character variation and trait indicators change rule.
Analysis was made of the growth performance and nuts' economic traits of the nine walnut cultivars in Guangyuan city.The results showed that (1) these cultivars had strong growth potential and high,stable yield characteristics.This area boasted an abundance of useful walnut varieties,so there was still a large space for characteristic variety development.(2) These walnut cultivars were appropriate in shapes and nut shell thickness with degraded and membranous diaphragm.Most of the nut shells were easily broken for kernel-taking with a high yield of kernels.Walnut cultivars with big nuts,high kernels-taking rate and storage stability should be chosen for variety extension,such as Shuchao 2,Qingchuan 1,Wanghe 1.(3) The coefficients of variation were low in average walnut diameter,crude fat content and kernel yield,which showed high genetic stabilities of these indicators;(4) there was a significant correlation among the weight of single walnut,the average walnut diameter,shell thickness,kernel,crude fat content and crude protein content.The correlation had a certain guiding significance for character variation and trait indicators change rule.
2019, 40(1): 56-58.
doi: 10.16779/j.cnki.1003-5508.2019.01.012
Abstract:
In this paper,obseration and estimation were made of the survival rate, growth and leaf color changes of Osmanthus fragrans Colour Group introduced in the experiment area in Luzhou in order to explore whether O. fragrans Colour Group could grow normally and maintain the characteristics of leaf color in Luzhou;The results showed that the survival rate was up to 98.15%,and the plants grew well without serious pests and diseases;The experiment showed that O. fragrans Colour Group was suitable for promotion and application in Luzhou.
In this paper,obseration and estimation were made of the survival rate, growth and leaf color changes of Osmanthus fragrans Colour Group introduced in the experiment area in Luzhou in order to explore whether O. fragrans Colour Group could grow normally and maintain the characteristics of leaf color in Luzhou;The results showed that the survival rate was up to 98.15%,and the plants grew well without serious pests and diseases;The experiment showed that O. fragrans Colour Group was suitable for promotion and application in Luzhou.
2019, 40(1): 59-60,91.
doi: 10.16779/j.cnki.1003-5508.2019.01.013
Abstract:
In recent years,a leaf-eating pest,Heortia vitessoides,was found in a large area in the plantation of Aquilaria sinensis in Xishuangbanna,which caused serious damage to the plantation.In order to explore an effective way to control this pest,five insecticides were selected to carry out the control experiment in the 4-year-old A. sinensis plantation in Puwen Town,Xishuangbanna.The results showed that all the five insecticides had certain control effects on the larvae of Heortia vitessoides,and the insecticidal efficacy of methyl-indenocarb and emamectin benzoate was better.The corrected mortality rate of the three pesticides reached 100% one day after treatment,followed by chlorpyrifos and cypermethrin reaching 100% two days after treatment and 2.5% cyhalothrin reaching 100% 4 days after treatment., effect of 5%matrine was the weakest one day after treatment,but mortality rate could reach 75% four day after treatment.
In recent years,a leaf-eating pest,Heortia vitessoides,was found in a large area in the plantation of Aquilaria sinensis in Xishuangbanna,which caused serious damage to the plantation.In order to explore an effective way to control this pest,five insecticides were selected to carry out the control experiment in the 4-year-old A. sinensis plantation in Puwen Town,Xishuangbanna.The results showed that all the five insecticides had certain control effects on the larvae of Heortia vitessoides,and the insecticidal efficacy of methyl-indenocarb and emamectin benzoate was better.The corrected mortality rate of the three pesticides reached 100% one day after treatment,followed by chlorpyrifos and cypermethrin reaching 100% two days after treatment and 2.5% cyhalothrin reaching 100% 4 days after treatment., effect of 5%matrine was the weakest one day after treatment,but mortality rate could reach 75% four day after treatment.
2019, 40(1): 61-65.
doi: 10.16779/j.cnki.1003-5508.2019.01.014
Abstract:
For more comprehensive understanding of species resources,new records of species have been investigated by infrared cameras in Mabian Dafengding Nature Reserve since 2016.A total of eight species,including 1 record of a second-level State-protected species (himalayan owl), 4 species with beneficial economic and scientific research value (grey-sided thrush,dark-rumped rosefinch, eurasian woodcock,orange small flying squirrel),and 1 vulnerable species designated by the IUCN red list (grey-sided thrush).It was suggested that analysis should be focused on the animals' distribution area,such as medium altitude (2 100 m~2 600 m),and investigations into habitat suitability and behaviour were needed in order to intensify the supervision and protection.
For more comprehensive understanding of species resources,new records of species have been investigated by infrared cameras in Mabian Dafengding Nature Reserve since 2016.A total of eight species,including 1 record of a second-level State-protected species (himalayan owl), 4 species with beneficial economic and scientific research value (grey-sided thrush,dark-rumped rosefinch, eurasian woodcock,orange small flying squirrel),and 1 vulnerable species designated by the IUCN red list (grey-sided thrush).It was suggested that analysis should be focused on the animals' distribution area,such as medium altitude (2 100 m~2 600 m),and investigations into habitat suitability and behaviour were needed in order to intensify the supervision and protection.
2019, 40(1): 66-71.
doi: 10.16779/j.cnki.1003-5508.2019.01.015
Abstract:
Liangshantriton taliangensis is an endemic amphibian in the Daliang Mountain area,which has a unique evolution priority and conservation concern.Shimian County is one of most important distribution areas.Its distribution and population status in Shimian County were investigated by questionnaire and quadrate methods.The results showed that the Liangshantriton taliangensis amphibians were widely distributed in Shimian county,and 8 localities were identified.The populations were relatively abundant. Owing to the human harvesting,pollution,invasive species,and degradation of breeding habitats,some populations were declining.Therefore, a series of conservation recommendations were presented.
Liangshantriton taliangensis is an endemic amphibian in the Daliang Mountain area,which has a unique evolution priority and conservation concern.Shimian County is one of most important distribution areas.Its distribution and population status in Shimian County were investigated by questionnaire and quadrate methods.The results showed that the Liangshantriton taliangensis amphibians were widely distributed in Shimian county,and 8 localities were identified.The populations were relatively abundant. Owing to the human harvesting,pollution,invasive species,and degradation of breeding habitats,some populations were declining.Therefore, a series of conservation recommendations were presented.
2019, 40(1): 72-76.
doi: 10.16779/j.cnki.1003-5508.2019.01.016
Abstract:
The mature zygotic embryo of Larix olgensis was used as the research object.The callus and adventitious bud induction experiments were made to select disinfection method of explants, appropriate medium and hormone combination for L.olgensis.The optimum disinfection method was to sterilize peeled seeds with 4% NaClO for 15 min,and to disinfect the embryos with 0.5% NaClO for 2 min;BM was the optimum medium for callus induction;In BM medium supplemented with 2.0 mg·l-1 TDZ,the callus induction reached the highest rate,89%;In BM medium combined with 1.5 mg·l-1 TDZ,the adventitious bud induction reached the highest rate,80.0%.
The mature zygotic embryo of Larix olgensis was used as the research object.The callus and adventitious bud induction experiments were made to select disinfection method of explants, appropriate medium and hormone combination for L.olgensis.The optimum disinfection method was to sterilize peeled seeds with 4% NaClO for 15 min,and to disinfect the embryos with 0.5% NaClO for 2 min;BM was the optimum medium for callus induction;In BM medium supplemented with 2.0 mg·l-1 TDZ,the callus induction reached the highest rate,89%;In BM medium combined with 1.5 mg·l-1 TDZ,the adventitious bud induction reached the highest rate,80.0%.
2019, 40(1): 77-80.
doi: 10.16779/j.cnki.1003-5508.2019.01.017
Abstract:
In order to find out the distribution of kiwifruit canker disease in the field,the spatial distribution pattern of the disease was determined by classical aggregation index method and regression analysis method in this study.The results showed that canker-diseased kiwifruit plants showed aggregation distribution in the field,and the basic form of distribution was individual population.The optimum theoretical and sequential sampling numbers were calculated respectively for field sampling of Kiwifruit canker disease,and the optimum sampling square size was determined.The efficiency of investigation sampling was effectively improved through the above research courses,thus providing reference for the prevention of this disense.
In order to find out the distribution of kiwifruit canker disease in the field,the spatial distribution pattern of the disease was determined by classical aggregation index method and regression analysis method in this study.The results showed that canker-diseased kiwifruit plants showed aggregation distribution in the field,and the basic form of distribution was individual population.The optimum theoretical and sequential sampling numbers were calculated respectively for field sampling of Kiwifruit canker disease,and the optimum sampling square size was determined.The efficiency of investigation sampling was effectively improved through the above research courses,thus providing reference for the prevention of this disense.
2019, 40(1): 81-86.
doi: 10.16779/j.cnki.1003-5508.2019.01.018
Abstract:
As nitrogen fixation trees of non-Leguminosae,Alnus was becoming an ecologically valuable genus of plants for its ability in soil improvement and adaptation.In this paper,the research progress was reviewed and discussed on phylogeny and genetic variation on the level of chromosome,isozymes,RFLP,RAPD,AFLP and SSR in Alnus,including subgenus taxon,cytology,population genetic diversity and structure, phylogeography,and so on, with the expectation to provide references to genetic improvement of Alnus in future.
As nitrogen fixation trees of non-Leguminosae,Alnus was becoming an ecologically valuable genus of plants for its ability in soil improvement and adaptation.In this paper,the research progress was reviewed and discussed on phylogeny and genetic variation on the level of chromosome,isozymes,RFLP,RAPD,AFLP and SSR in Alnus,including subgenus taxon,cytology,population genetic diversity and structure, phylogeography,and so on, with the expectation to provide references to genetic improvement of Alnus in future.
2019, 40(1): 87-91.
doi: 10.16779/j.cnki.1003-5508.2019.01.019
Abstract:
The ecological footprint was an important method for measuring sustainable development.As the ecological footprint became increasingly mature,there were more and more application cases based on it.By reviewing the development history,the computing methods and the application were summarized for domestic ecological footprins. Also,there was a brief summary and analysis about the shortcomings of ecological footprints.At the end of the article,An outlook was made for the application development of ecological footprint model in the future.
The ecological footprint was an important method for measuring sustainable development.As the ecological footprint became increasingly mature,there were more and more application cases based on it.By reviewing the development history,the computing methods and the application were summarized for domestic ecological footprins. Also,there was a brief summary and analysis about the shortcomings of ecological footprints.At the end of the article,An outlook was made for the application development of ecological footprint model in the future.
2019, 40(1): 92-97.
doi: 10.16779/j.cnki.1003-5508.2019.01.020
Abstract:
Classification and evaluation of forest site were one of the most important fundamental work in forestry production planning, field operation design,afforestation and forest cultivation,and also the key to planting trees and promoting the healthy development of woodland productivity and forestry.It was significant for improving the quality of cultivation,developing sustainable forestry,and restoring and expanding forest resources.In this article,the research status was systematically reviewed together with features of site classification and evaluation at home and abroad. Meanwhile,based on the development and application of remote sensing information technology,site classification and evaluation were analyzed and summarized in combination with the previous concrete research cases.Overall,site classification and evaluation by remote sensing information technology improved not only accuracy and objectivity,but also convenience and rapidness.In the future,more computer technology and remote sensing information technology could be utilized to develop into comprehensive site classification and evaluation with multi-factor and multi-level.
Classification and evaluation of forest site were one of the most important fundamental work in forestry production planning, field operation design,afforestation and forest cultivation,and also the key to planting trees and promoting the healthy development of woodland productivity and forestry.It was significant for improving the quality of cultivation,developing sustainable forestry,and restoring and expanding forest resources.In this article,the research status was systematically reviewed together with features of site classification and evaluation at home and abroad. Meanwhile,based on the development and application of remote sensing information technology,site classification and evaluation were analyzed and summarized in combination with the previous concrete research cases.Overall,site classification and evaluation by remote sensing information technology improved not only accuracy and objectivity,but also convenience and rapidness.In the future,more computer technology and remote sensing information technology could be utilized to develop into comprehensive site classification and evaluation with multi-factor and multi-level.
2019, 40(1): 98-102.
doi: 10.16779/j.cnki.1003-5508.2019.01.021
Abstract:
Forest health preservation was a new thing that combined health preservation with forestry tourism.Research on forest health preservation was still in its infancy. By combing the overview of forest health development,it was believed that the basic elements of forest health preservation included forest environment,product and service of forest health preservation,corresponding supporting facilities.To optimize the quality of forest health preservation,it was necessary to strengthen research on forest medicine,optimize forest environment for health preservation,strengthen talents team cultivation for forest health preservation and provide unique products and services of forest health preservation.
Forest health preservation was a new thing that combined health preservation with forestry tourism.Research on forest health preservation was still in its infancy. By combing the overview of forest health development,it was believed that the basic elements of forest health preservation included forest environment,product and service of forest health preservation,corresponding supporting facilities.To optimize the quality of forest health preservation,it was necessary to strengthen research on forest medicine,optimize forest environment for health preservation,strengthen talents team cultivation for forest health preservation and provide unique products and services of forest health preservation.
