欢迎访问林草资源研究

Most Down Articles

    Published in last 1 year | In last 2 years| In last 3 years| All| Most Downloaded in Recent Month | Most Downloaded in Recent Year|

    Most Downloaded in Recent Year
    Please wait a minute...
    For Selected: Toggle Thumbnails
    Analysis of General Status and Examination of Estimation Errors for One-Variable Tree Volume Tables in China
    ZENG Weisheng, YANG Xueyun
    FOREST RESOURCES WANAGEMENT    2023, 0 (2): 43-49.   DOI: 10.13466/j.cnki.lyzygl.2023.02.006
    Abstract395)   HTML20)    PDF (1271KB)(1341)       Save

    Tree volume tables are important basic tools in forest inventory and monitoring.One-variable tree volume tables have been used in continuous forest inventories (CFIs) of China for more than 40 years,but we have never systematically tested the applicability in nowadays.In this paper,the general status of currently used one-variable tree volume tables were analyzed from the aspects of quantity,zoning,tree species,and model type;and most of one-variable tree volume tables were examined by using the tree height data of 138 911 sample trees.The results showed that the total number of one-variable tree volume tables used in China's CFI reached 707,and the number of provincial volume tables varied greatly,from 3 to 171;there were 18 provincial regions divided into several modeling populations,while others were based on whole provincial regions;there were also great differences in the number of tree species groups for developing tree volume tables in each provincial region,with the least being 3 and the most being 31;a total of 25 models were used to develop tree volume tables,but nearly 90% of the tree volume tables were based on 5 models;about 70% of the one-variable tree volume tables exceeded the allowable error limit of ±5%,and 10 of 31 provincial regions and four forest industry groups exceeded the range of ±10% of the volume estimation errors,among which the maximum negative bias was -14.86% and the maximum positive bias was 23.22%.Based on the results of analysis,it is suggested that at the end of this inventory,a comprehensive and systematic applicability test should be carried out on the current one-variable tree volume tables;and unified revision should be made on the tree volume tables with significant deviation,so as to optimize and adjust the division of modeling populations,tree species grouping and the volume model type;and the change of volume estimation method from one-variable table to two-variable table should be actively promoted.

    Table and Figures | Reference | Related Articles | Metrics
    Key Data Results and Trend Analysis of the Sixth National Survey on Desertification and Sandification
    ZAN Guosheng, WANG Cuiping, LI Feng, LIU Zheng, SUN Tao
    FOREST RESOURCES WANAGEMENT    2023, 0 (1): 1-7.   DOI: 10.13466/j.cnki.lyzygl.2023.01.001
    Abstract3097)   HTML266)    PDF (1091KB)(1335)       Save

    The Sixth National Survey on Desertification and Sandification was based on the results of the Third National Land Survey,using 2019 as the benchmark year.The results showed a comprehensive status of desertification and sandification in China.This paper presented a brief overview of this survey,the status and dynamic changes of desertification and sandification in China,conducted a comprehensive analysis of the current situation,and proposed some suggestions for combating desertification and sandification.The survey results showed that,until 2019,the desertification land area in China was 257.371 3 million hm2 and the sandification land area was 168.782 3 million hm2.Compared with 2014,the desertification area of China decreased by 3.788 0 million hm2 with an average annual decrease of 757.6 thousand hm2.The sandification area of China decreased by 3.335 2 million hm2 with an average annual net reduction of 667 thousand hm2.

    Table and Figures | Reference | Related Articles | Metrics
    Fire Environment of Forest Fire Formation in Liangshan Prefecture
    BAI Ye, WANG Bo, WU Yingda, LIU Bo
    FOREST RESOURCES WANAGEMENT    2020, 0 (5): 116-122.   DOI: 10.13466/j.cnki.lyzygl.2020.05.017
    Abstract513)   HTML17)    PDF (1468KB)(962)       Save

    Forest fire has seriously damaged forest resources,threatened the safety of life and property,and caused huge losses.Fire environment is an important condition for forest burning.Analyzing the forest fire environment is of great theoretical and practical significance for studying forest fire behavior and adopting effective forest fire management policies.On the basis of collecting meteorological data,forest resource data and topographic data of Liangshan Prefecture,this paper analyzes the fire environment characteristics of forest fire in Liangshan Prefecture from three aspects:fuel,meteorological conditions and topographic conditions.In addition,the countermeasures of forest fire management,such as strengthening fire prevention media campaign,strengthening forest fuel management,strengthening forest management,improving infrastructure construction,and improving emergency response level,were put forward.The research results can provide basis for fire behavior analysis and forest fire management in Liangshan Prefecture.

    Table and Figures | Reference | Related Articles | Metrics
    Research of Key Technology for National Forest-land “One Map” Database
    XU Dengping,LI Hui,PANG Lijie,ZHANG Yuxing,HUANG Guosheng,HAN Aihui
    FOREST RESOURCES WANAGEMENT    2015, 0 (5): 36-43.   DOI: 10.13466/j.cnki.lyzygl.2015.05.007
    Abstract618)      PDF (3140KB)(2528)       Save
    In this study,we introduced the contents of forest-land “one map” for the county,provincial and national levels,and studied the key technologies of forest-land “one map” information extraction,data check and the integration of database.Based on the WebService,we designed and developed a data management and service platform of national forest-land “one map”,and operated it online.lastly,the data application for forest-land “one map” was discussed.
    Reference | Related Articles | Metrics
    Main Results of the Fourth Rocky Desertification Survey in Karst Area and Analysis of Rocky Desertification Control Situation
    NING Xiaobin, WU Xiebao, HUANG Junwei, WU Houjian, LIU Wei, PENG Xi
    FOREST RESOURCES WANAGEMENT    2023, 0 (3): 9-14.   DOI: 10.13466/j.cnki.lyzygl.2023.03.002
    Abstract413)   HTML31)    PDF (972KB)(911)       Save

    The fourth rocky desertification survey in Karst area was based on the result of the third national land survey,while taking 2021 as the base year to comprehensively investigate the condition and change of the rocky desertification land China.This paper briefly introduced the basic situation of the fourth rocky desertification survey,the present situation and dynamic change of rocky desertification land,as well as analyzed the current situation of rocky desertification control,and put forward countermeasures and suggestions.The results showed that,the rocky desertification land area was 7.223 million hm2 by 2021.Compared with 2016,the net decrease of rocky desertification land area was 3.331 million hm2,while the average annual decrease was 0.666 million hm2.The main results indicating that the rocky desertification land in China presents the overall evolution direction of "area decreasing,degree reduction and ecological condition being stable ".

    Table and Figures | Reference | Related Articles | Metrics
    A New Concept “Tree Species Mingling” for Mixed Degree of Stands Based on Tree Species Spectrum
    ZHANG Ke, FENG Sisi, HUANG Lang, LI Jianjun
    FOREST RESOURCES WANAGEMENT    2021, 0 (4): 62-68.   DOI: 10.13466/j.cnki.lyzygl.2021.04.009
    Abstract632)   HTML19)    PDF (1124KB)(947)       Save

    Spatial segregation degree of tree species is an important content in the study of stand spatial structure,which is usually described by the mingling degree.The existing mingling degree indices only have the same species or different species results when describing the probability that the object tree and the nearest neighbor tree are different species,which cannot fully explain the mingling degree of tree species.Based on the traditional mingling degree and tree species pedigree relationship,the concept of tree species mingling degree was put forward in this paper.The traditional mingling degree and tree species mingling degree were compared and analyzed with 25 sample plots in 5 forest regions of Hunan Province,and the stand simulation and optimization were carried out by using tree species mingling degree.The results showed that there was a strong correlation between tree species mingling degree and traditional mingling degree,and tree species mingling can further refine the isolation degree of tree species in the structural unit,which can be used for the evaluation and optimization of stand spatial structure.

    Table and Figures | Reference | Related Articles | Metrics
    Natural Distribution and Characteristics of China’s Rare and Endangered Species in Shandong Province
    LIU Dan, ZANG Dekui
    FOREST RESOURCES WANAGEMENT    2018, 0 (1): 155-158.   DOI: 10.13466/j.cnki.lyzygl.2018.01.022
    Abstract445)   HTML11)    PDF (1037KB)(975)       Save

    According to the investigation result of forest tree germplasm resources in Shandong province,there are 15 Chinese rare and endangered tree species naturally distributed there,which belongs to 12 families,13 genera,and the characteristics of their natural distribution are summarized.Suggestions of protection are put forward for carrying out related research in the future.

    Table and Figures | Reference | Related Articles | Metrics
    Grassland Vegetation Coverage Retrieval Based on Sentinel-2 Multi-Spectral Remote Sensing Data: A Case Study of Inner Mongolia Autonomous Region
    TIAN Haijing, WANG Lin, HAN Liliang, FAN Yunbao, YANG Jilin
    FOREST RESOURCES WANAGEMENT    2022, 0 (4): 134-140.   DOI: 10.13466/j.cnki.lyzygl.2022.04.017
    Abstract413)   HTML16)    PDF (4757KB)(928)       Save

    High-precision grassland vegetation coverage remote sensing estimation model is important for quantitative assessment of grassland quality and fine management of grassland.Based on Sentinel-2 multi-spectral remote sensing data and measured sample plots in Inner Mongolia autonomous Region,grassland vegetation coverage was modeled and inverted.The results showed that:1)There was a significant correlation between the 23 vegetation indexes and the measured vegetation coverage (P<0.001),and the highest correlation coefficient was NDVI with a correlation coefficient of 0.834;2)The underestimation of sinusoidal function was more obvious in the high value part (coverage>75%),while the overestimation of linear function was more obvious in the low value part (coverage<25%),by using these two kinds of functions to simulate vegetation coverage,the results were better;3)The grassland types were divided into 6 groups to modeling vegetation coverage respectively.Finally,correlation coefficient between simulated and measured vegetation coverage for the 1 894 sample plots was R2=0.722,P<0.01,RMSE=12%;4)The vegetation coverage of different grassland types in Inner Mongolia from high to low was 78.91% for mountain meadow,73.7% for temperate meadow steppe,53.89% for lowland meadow,52.57% for temperate steppe,32.76% for temperate desert steppe,25.52% for temperate grassland desert and 19.29% for temperate desert.

    Table and Figures | Reference | Related Articles | Metrics
    Diversity of Butterfly Community in Fenglin National Nature Reserve
    YUAN Gaixia
    FOREST RESOURCES WANAGEMENT    2021, 0 (5): 87-96.   DOI: 10.13466/j.cnki.lyzygl.2021.05.012
    Abstract383)   HTML11)    PDF (1197KB)(881)       Save

    To explore butterfly community diversity in Fenglin National Nature Reserve,butterflies were investigated with the line transect method inside and outside the reserve from June to August each year from 2016 to 2018.A total of 15 083 butterflies were observed,of which 99 species in 60 genera under seven families were identified.Nymphalidae was the dominant family,with the most number of genera,species and individuals.There were 5 dominant species,19 common species,57 unusual species and 18 rare species.Nymphalidae had the highest diversity index and richness index,Papilionidae had the highest dominance index and Parnassiidae had the highest evenness index.There was a significant difference in diversity of butterflies among habitats,with the diversity index being the highest in medium altitude core area and the lowest in high altitude experimental area.The diversity index of butterflies had a significant positive correlation with their richness index in all habitats (r=0.9971,P<0.001).The dynamic trend of species number,the diversity index and the richness index was consistence,being the highest in July and the lower in June and August.The community similarity coefficient of species was 0.8 inside and outside the reserve,showing they were very similar.The community similarity coefficient of species among different habitats ranged from 0.55 to 0.81,high coefficient indicating slight difference of comprehensive environmental factors.In conclusion,Fenglin Nature Reserve had abundant butterfly resources,a healthy ecosystem,stable environment,and high protection value.

    Table and Figures | Reference | Related Articles | Metrics
    Comparison and Analysis on Two Kinds of Sample Plot Survey Methods of Systematic Sampling in the Forest Inventory for Planning and Design
    XU Zhengliang, WANG Yingquan, LU Yongfei, YANG Jie
    FOREST RESOURCES WANAGEMENT    2016, 0 (3): 140-144.   DOI: 10.13466/j.cnki.lyzygl.2016.03.025
    Abstract458)      PDF (974KB)(915)       Save
    This paper took systematic sampling as an example in the fourth forest inventory for planning and design in Jinping County of Guizhou Province,and the point sampling with angle gauge & volume standard table and circle-shaped sample tally & two-way tree volume table were compared and analyzed.The results showed that the precisions of the volume estimates from the point sampling with angle gauge and circle-shaped sample tally were respectively 90.28%and 90.38%,exceeding 90% which is the precision standard of the technical specification for the forest inventory in Guizhou.The difference of total forest stand volume between two forest inventories was only 1.63%;The sample tree of the point sampling with angle gauge was less,but more efficient than the circle-shaped sample tally in sampling,and the load of field work of the former was about 40% of the latter;the number of trees per hectare,cross-sectional area at breast height of per hectare and hectare volume were lower than the circle-shaped sample tally in the precisions of estimates.Subcompartment volume cruise with angle gauge & volume standard table,systematic sampling with circle-shaped sample tally & two-way tree volume table are applicable in the sampling control of total volume.
    Reference | Related Articles | Metrics
    Concession Management Analysis and Operation Model Selection of China's National Parks
    GENG Songtao, ZHANG Hongxia, YAN Rong
    FOREST RESOURCES WANAGEMENT    2021, 0 (5): 10-19.   DOI: 10.13466/j.cnki.lyzygl.2021.05.002
    Abstract1011)   HTML47)    PDF (1114KB)(1215)       Save

    National park is one of the core tasks of China's protected area system construction.In order to achieve the win-win goal of national park ecological protection and resource appreciation,franchising is a good method that can be used in its operation and management.According to the classification,the national park franchise in our country belongs to the government concession.In order to regulate the concession management,this article used a comparative analysis method to analyze the O&M model (Operation and Maintenance Contract),the LOT model (Lease-Operate-Transfer),and BOT (Build-Operate-Transfer)mode and TOT (Transfer-Operate-Transfer)concession model are compared and analyzed,and it was concluded that the TOT model is currently the better choice for national park concession in China,and other models can also be used in conjunction with local conditions.In addition,in view of the existing problems in legal regulation,operation management,fund revenue and expenditure,and supervision of current characteristics of operation,four special measures such as improving the legal system,standardizing operation procedures,formulating revenue and expenditure standards,and improving the supervision mechanism were proposed to effectively contribute to China's ecological civilization.This article studied and explored the future development path of concession in national park management,so as to provide reference and inspiration for promoting the development of national parks.

    Table and Figures | Reference | Related Articles | Metrics
    Population Size Structure and Life Table Analysis of Nyssa sinensis in Sanming City,Fujian Province
    HUANG Yunpeng, SU Songjin, FAN Fanrong, WANG Bangfu, HUANG Sumei, CHEN Shaohuang
    FOREST RESOURCES WANAGEMENT    2015, 0 (3): 85-88.   DOI: 10.13466/j.cnki.lyzygl.2015.03.017
    Abstract291)      PDF (1190KB)(1011)       Save
    To comprehensively understand the variation of Nyssa sinensis population in Sanming City,the space time method and smoothing technique were used in life table analysis.Results showed that diameter at breast height (DBH)structure of N.sinensis population is at temporal stability.The peak of mortality rate and vanishing rate both appeared at the age of 3-4 and 8 years,respectively.The survival curve can be described by Deevey-Ⅱtype.Four function curve of survival exhibited that N.sinensis population decreased at young stage and grew stably at mature stage and old stage.The results can provide a scientific basis for the management of N.sinensis population.
    Reference | Related Articles | Metrics
    Species Diversity and Its Associated Factors of Castanopsis orthacantha Community in Central Yunnan
    PENG Zexi, LUO Hang, LI Xiaoying, XU Yanhong, YIN Wuyuan, ZHU Hongqin, CHEN Yuqiang, CHEN Xiaoqin
    FOREST RESOURCES WANAGEMENT    2023, 0 (2): 138-146.   DOI: 10.13466/j.cnki.lyzygl.2023.02.019
    Abstract240)   HTML9)    PDF (1023KB)(567)       Save

    In order to accurately grasp the species diversity level of Castanopsis orthacantha community and its relationship with related factors in central Yunnan,based on the investigation of typical plots,the Margalef richness index,Pielou evenness index,Shannon-Weiner diversity index and species diversity comprehensive index were used to measure the species diversity level of Castanopsis orthacantha community,and the grey correlation analysis method was used to explore the relationship between species diversity level and site factors,stand factors and forest disturbance intensity.The results showed that:1) The species composition of Castanopsis orthacantha community was rich,involving 75 families,141 genera and 202 species,and the species composition of shrub layer was the most complex.The tree species composition of the arbor layer had the characteristics of typical subtropical evergreen broad-leaved forest.And there were significant differences in species composition and important values in different regions.2) The richness index,diversity index and evenness index of shrub layer (including regeneration layer) were the highest,and the species diversity of Castanopsis orthacantha community was at a medium level.The species diversity of different survey areas in the study area was different.The contribution rate of herb layer and shrub layer (including regeneration layer) to the comprehensive index of community species diversity was the highest.3) There was a strong correlation between species diversity and six factors in three levels of site factors,stand factors and forest disturbance intensity.The order of correlation degree was altitude>forest disturbance intensity>average DBH>aspect>plant density>slope.Through research,the aim is to provide a basis for the restoration and conservation measures of Castanopsis orthacantha community in central Yunnan.

    Table and Figures | Reference | Related Articles | Metrics
    Habitat Characteristics and Effects on Growth of Arundinaria faberi in Different Slope Positions of Subalpine Meadow
    YAN Keyu, CHEN Pingping, LI Jianxing, ZHANG Limei, LIU Hui, CHEN Zhengfa
    FOREST RESOURCES WANAGEMENT    2023, 0 (2): 70-78.   DOI: 10.13466/j.cnki.lyzygl.2023.02.010
    Abstract198)   HTML7)    PDF (2297KB)(646)       Save

    As a dominant plant species in subalpine meadows on the low-latitude plateau,it is of great guiding significance to clarify the habitat characteristics and key growth factors of different slope positions of Arundinaria faberi for its community protection.The research object was Arundinaria faberi in the subalpine meadow of Gaoben Mountain in Xundian,Yunnan.By investigating the characteristics of growth and habitat factors of Arundinaria faberi in different slope positions,the key growth factors of Arundinaria faberi were identified by correlation heat map.The results showed that:1) The air temperature and relative humidity tended to decrease with the increase of the slope position,while the wind speed and solar radiation intensity increased with the increase of the slope position.2) The soil particle composition of different slope positions was mainly composed of silt particles.The soil bulk density increased with the increase of the slope position.The soil moisture content,large aggregate content and soil chemical indicators all increased first and then decreased with the increase of the slope position.The meadow soil was obviously acidic,and the soil quality level reflected by the physical and chemical characteristics of the middle slope soil was relatively higher.3) With the increase of the slope position,the morphology and community characteristics of Arundinaria faberi showed a significant deterioration trend.4) Correlation heat map analysis showed that air temperature,solar radiation intensity,wind speed,soil bulk density and available phosphorus had a great influence on the corresponding growth characteristics of Arundinaria faberi among which air temperature,solar radiation intensity,wind speed and soil bulk density were the most influential key factor for growth.

    Table and Figures | Reference | Related Articles | Metrics
    The Resource Status and Conservation Strategies of National Key Protected Wild Plants in China
    JIANG Yafang, TIAN Jing, LIU Zengli, MA Wei, SHAO Wei, BAI Ling
    FOREST RESOURCES WANAGEMENT    2023, 0 (4): 1-10.   DOI: 10.13466/j.cnki.lyzygl.2023.04.001
    Abstract465)   HTML53)    PDF (1248KB)(483)       Save

    Accurate data on the population and survival status of wild plant are the basis for the plant diversity conservation.The Regulations of the People's Republic of China on the Protection of Wild Plants make it clear that the wild plants administrative departments should periodically organize surveys of national key protected wild plants,and establish wild plants resource archives.Therefore,China launched the second national survey of national key protected wild plants in 2012.Based on the survey data,the population,community area and in situ conservation status of 283 species of national key protected wild plants in China are reported.Reasons for the changes of wild plant resources over the past 10 years are also discussed through comparative analysis between the first and second national survey of national key protected wild plants.In order to advance conservation and management of wild plants in China,several countermeasures and suggestions were put forward,including establishing a national platform for wild plant supervision and management,improving the plant diversity conservation system,and carrying out the wild plant rescue and conservation projects.

    Table and Figures | Reference | Related Articles | Metrics
    Spatio-temporal Change in Precipitation and Surface Temperature and Their Relationships with NDVI of Different Ecological Function Zones in North Xinjiang
    WANG Jiping, GUO Zhongjun, CHENG Fu, ZHANG Qibin, MA Huan, YU Yilei
    FOREST RESOURCES WANAGEMENT    2017, 0 (1): 110-117.   DOI: 10.13466/j.cnki.lyzygl.2017.01.019
    Abstract299)   HTML1)    PDF (2008KB)(635)       Save

    Precipitation and surface temperature are two most important climatic factors.They are also two main factors that affect the distribution and change of the vegetation.Based on the average annual precipitation,temperature,NDVI and snow depth data of many years,the changes in different climate factors and their correlation with NDVI were analyzed.The result shows that:most of the regions in north Xinjiang tend to be wetting,especially in the central area of the Junggar Basin,where the slope of the precipitation change is between 1.15 and 1.42;the annual average precipitation in the high altitude mountain area that only makes up 2% of the whole region decreases obviously,the sharpest decreasing slope of the precipitation change is -0.203;the overall temperature of north Xinjiang shows a warming trend,of which the slope of temperature increase shows a significantly gradient pattern from high mountains(2.04)to lowland(-0.044);NDVI is closely related to average annual rainfall and temperature variations.We should attach importance to strengthening the construction and management of vegetation on the scale of ecological function area.

    Table and Figures | Reference | Related Articles | Metrics
    Status and Prospects of Forest measurement instruments
    LIU Falin, LU Yong, ZENG Siqi
    FOREST RESOURCES WANAGEMENT    2011, 0 (1): 96-99.  
    Abstract223)      PDF (906KB)(617)       Save
    Forest measurement instruments are the basic tools of forest resources investigation.This paper analyzed the main features and weaknesses of forest measurement instruments.At last it presents a description on the development trend of forest measurement instruments.
    Reference | Related Articles | Metrics
    Comparison of Vegetation Classification Methods Based on High Resolution Remote Sensing Image
    ZHANG Diandai, WANG Xuemei
    FOREST RESOURCES WANAGEMENT    2021, 0 (3): 108-113.   DOI: 10.13466/j.cnki.lyzygl.2021.03.017
    Abstract523)   HTML18)    PDF (2282KB)(812)       Save

    Taking the oasis-desert transition zone in the eastern part of Kuqa City,Xinjiang as the research object and using GF2 remote sensing image as the main data source,on the basis of field investigation,supervised classification based on pixel and object oriented classification based on hierarchical multi-scale segmentation were used to accurately identify the vegetation information in the study area.The results showed that:1) The results of supervised classification and object-oriented classification were roughly the same.The overall classification accuracy rates of both methods could reach more than 94%,and the Kappa coefficient was greater than 0.93,both of which reflect higher classification accuracy.2)Compared with supervised classification,the object-oriented classification method improved the overall classification accuracy by 3.79%,and the Kappa coefficient increased by 0.032,which had a better classification effect and classification accuracy.By determining the optimal scale segmentation,the object-oriented classification method can more accurately extract vegetation information in the study area,and provide a scientific basis for the reasonable evaluation of the regional land desertification status.

    Table and Figures | Reference | Related Articles | Metrics
    Analysis of Vegetation Cover Changes in Beijing from 2005 to 2020
    YU Shiyong, XU Qian, YU Xiaofei
    FOREST RESOURCES WANAGEMENT    2023, 0 (3): 98-104.   DOI: 10.13466/j.cnki.lyzygl.2023.03.013
    Abstract329)   HTML13)    PDF (3716KB)(404)       Save

    Based on NDVI data from 2005—2020,the spatial distribution characteristics,temporal distribution characteristics and spatio-temporal characteristics of vegetation were analysed using NDVI classification and difference analysis to reveal the spatio-temporal patterns of NDVI changes in Beijing,and to explore the reasons for the changes by analysing the vegetation cover changes in Beijing in the past 15 years.Through analysis,it is found that,the overall vegetation cover in the Beijing area is at a high level.From a regional perspective,the areas with very high NDVI mean coverage classes in Beijing from 2005 to 2020 were all located in the Jundu and Xishan mountain ranges.The vegetation coverage of Mentougou District,Huairou District,Yanqing District,Fangshan District,Changping District and Pinggu District was at the highest level in Beijing.In terms of time,the level of vegetation coverage changed significantly from 2005 to 2020,with the average annual NDVI value increasing from 0.659 0 to 0.756 6,an increase of 14.81%.The proportion of area with "very high" vegetation coverage increased from 5.31% to 47.79%,and the proportion of area with "low" vegetation coverage decreased from 5.91% to 1.25%.In terms of spatiotemporal change characteristics of vegetation,the area with obvious improvement and slight improvement accounted for more than 80%.Two "million mu afforestation" projects and mountain forest management were the main driving forces to improve the quality of vegetation coverage in Beijing.

    Table and Figures | Reference | Related Articles | Metrics
    Status Quo and Improvement of Forest Fire Prevention and Control Ability in China-Myanmar Border in Yunnan Province
    GUAN Pingao, PENG Xingzi, CHEN Yuyong, ZHANG Hongfei, JIANG Jian, LI Shiyou
    FOREST RESOURCES WANAGEMENT    2021, 0 (5): 153-159.   DOI: 10.13466/j.cnki.lyzygl.2021.05.020
    Abstract483)   HTML8)    PDF (1075KB)(484)       Save

    Based on the investigation of the basic situation and characteristic practices of forest fire prevention and control in prefectures (cities)and counties in China-Myanmar border in Yunnan Province,the main problems and the necessity of improving its forest fire prevention and control ability were analyzed.From three aspects,namely forest fire prevention,fire fighting and emergency support,25 specific measures were put forward to improve this ability,including ecological barrier system,forest fuel treatment,water fire extinguishing equipment,team building,joint prevention and control fire,and general survey of fire hazard sources,etc.At the same time,some relevant suggestions were proposed.Through research and discussion,this paper aimed to improve the comprehensive prevention and control ability of forest fire in China-Myanmar border in Yunnan Province.

    Table and Figures | Reference | Related Articles | Metrics