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|

In last 2 years

Please wait a minute...


For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails

Select

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 Abstract （2045）   HTML （185）    PDF （1091KB）（933）       Knowledge map    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

Select

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 Abstract （276）   HTML （7）    PDF （1271KB）（837）       Knowledge map    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

Select

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 Abstract （326）   HTML （7）    PDF （4757KB）（731）       Knowledge map    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

Select

Dynamic Change and Influencing Factors of Vegetation Cover over the Past 30 years in the Wutai Mountain Area REN Tianchen, CHEN Junfeng, LIU Nan FOREST RESOURCES WANAGEMENT    2022, 0 (4): 89-99.   DOI: 10.13466/j.cnki.lyzygl.2022.04.012 Abstract （492）   HTML （11）    PDF （8599KB）（572）       Knowledge map    Save Based on 25 Landsat remote sensing data sources from 1991 to 2020,the temporal and spatial characteristics of vegetation coverage and its influencing factors in Wutai Mountain were analyzed by binary pixel model,wavelet analysis and partial correlation analysis.The results showed that the FVC values in Wutai Mountain area showed an increasing trend on the whole,in which the mean value of FVC in Wutai County was the highest,and the FVC growth rate in Yuanping City was the highest.There were three main change cycles of 9,12,21 years to control the change of FVC in the whole time domain.The vegetation cover in the study area showed a spatial distribution pattern of "low in the west and high in the east",and the improved area of vegetation cover was much larger than the degraded area.The CV values of Wutai County showed a large negative deviation phenomenon when the altitude was lower than 2 400m,and a large positive deviation phenomenon when the altitude was higher than 2 400m.The FVC values of Fanshi County showed an order as follows:shade slope>sunny slope>half shade slope>half sunny slope;The peak values of FVC in each slope direction of Dai County and Yuanping City appeared in the altitude range of 1 600~2 000m.The negative deviation of CV values in Wutai County,Dai County and Yuanping City increased with the increase of slope.From 1980 to 2015,the mean value of partial correlation coefficient between FVC value and temperature was 0.14,and that between FVC value and precipitation was 0.05.In Wutai Mountain area,the area of forest land and construction land increased,while the area of cultivated land and grassland decreased to varying degrees from 1980 to 2015,and there were vegetation decline problems in human-active areas such as mining areas and scenic spots. Table and Figures | Reference | Related Articles | Metrics

Select

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 Abstract （238）   HTML （14）    PDF （972KB）（537）       Knowledge map    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

Select

Study on the Current Situation and Modernization of State-Owned Forest Farms in Guizhou Province WEN Yu FOREST RESOURCES WANAGEMENT    2022, 0 (3): 36-41.   DOI: 10.13466/j.cnki.lyzygl.2022.03.006 Abstract （956）   HTML （197）    PDF （995KB）（476）       Knowledge map    Save This paper expounded the present situation and modernization construction mode of state-owned forest farms in Guizhou Province,analyzed the problems and shortcomings faced by the development of state-owned forest farms,and put forward the ways and measures to solve these problems,in order to provide reference for promoting the modernization construction of state-owned forest farms in Guizhou Province and realizing high-quality sustainable development. Reference | Related Articles | Metrics

Select

Research on Carbon Peak and Carbon Sink Capacity of Major Carbon Emitting Countries in the World ZHANG Zhe, ZHANG Yuxing FOREST RESOURCES WANAGEMENT    2023, 0 (2): 1-9.   DOI: 10.13466/j.cnki.lyzygl.2023.02.001 Abstract （278）   HTML （28）    PDF （4802KB）（443）       Knowledge map    Save At the level of realistic economy and technology,we must first achieve carbon peaking in order to achieve carbon neutrality.Studying the carbon peak foundation and carbon sink capacity of the major carbon emitting countries in the world has important reference significance for China to achieve carbon peak and carbon neutrality.This study sorted out the top 24 countries in economic aggregate among the world's 224 countries and regions.Based on the data of CO2 emissions,total GDP,energy consumption and reserves on forest carbon sink from 1960 to 2018,it found out total GDP and GDP per capita were positively correlated with CO2 emissions before carbon peak.When GDP per capita reached $\$$20000 to $\$$35000,and low-carbon energy accounted for more than 35%,it would be possible to achieve carbon peak and reduce carbon emissions.In addition,when GDP per capita reached $\$$35000 to $\$$45000,and high-carbon energy (coal and oil) accounted for no more than 55%,it would also be possible to achieve carbon peak and reduce carbon emissions.Energy supply structure was the first determinant of carbon peak time.The results showed that if the proportion of low-carbon energy was higher,it was easier to achieve carbon peak.Nowadays,the forest carbon sink capacity of 24 countries was constantly improving.However,the reserves on forest carbon sink were less than 15% of the country's annual carbon emissions in most countries.It still takes a long time to achieve carbon neutrality.Therefore,special attention should be paid to the healthy,stable,efficient and sustainable management of forest ecosystems. Table and Figures | Reference | Related Articles | Metrics

Select

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 Abstract （125）   HTML （7）    PDF （2297KB）（438）       Knowledge map    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

Select

Discussion on the Technical System of Forest Fire Risk Assessment JIANG Chunying, YANG Xueqing, ZHANG Guoli, SUN Zhichao, JIANG Yun'an, JIANG Aijun FOREST RESOURCES WANAGEMENT    2023, 0 (2): 17-26.   DOI: 10.13466/j.cnki.lyzygl.2023.02.003 Abstract （286）   HTML （19）    PDF （1228KB）（435）       Knowledge map    Save The risk assessment index system of forest fire was constructed by comprehensively utilizing the hazard of forest fire,the exposure and vulnerability of disaster bodies.The hazard of disaster was based on the contents of combustibles,meteorological conditions,field fire sources,terrain and topography,the exposure of disaster bodies was based on the contents of above-ground living biomass,number of buildings,population,GDP,and the vulnerability of disaster bodies was based on the proportion of flammable forest land,proportion of combustible building area,proportion of the elderly and young population,vulnerability of economic activities.Using The Analytic Hierarchy Process and expert scoring,this paper determined the weights of each evaluation indicator.It refined the accuracy of forest fire risk assessment to multiple spatial scales such as small class,30 arc second geographic grid,township level,county level,etc.to meet the accuracy requirements of forest fire prevention management at different administrative levels of the country,province,city,and county.At the same time,this paper proposed the best solution for forest fire risk identification in different regions and periods. Table and Figures | Reference | Related Articles | Metrics

Select

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 Abstract （178）   HTML （9）    PDF （1023KB）（341）       Knowledge map    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

Select

FOREST RESOURCES WANAGEMENT    Accepted: 10 December 2022

Select

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 Abstract （332）   HTML （44）    PDF （1248KB）（329）       Knowledge map    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

Select

Research on the Construction of Comprehensive Evaluation Index System of Natural Resources ZUO Song, HU Li, YANG Lina FOREST RESOURCES WANAGEMENT    2022, 0 (3): 12-18.   DOI: 10.13466/j.cnki.lyzygl.2022.03.002 Abstract （1028）   HTML （33）    PDF （999KB）（309）       Knowledge map    Save By collecting and sorting out relevant indicator systems and methods in the field of comprehensive evaluation of natural resources in China,some existing problems in the current evaluation system were summarized.On the basis of analyzing the key issues of natural resources management,combining with the relevant norms and standards published by the natural resources,forest and grassland,water conservancy,ecological environment and other departments,the comprehensive evaluation indicator system of natural resources with 12 second-level indicators and 41 third-level indicators was constructed from five dimensions of natural resources: background status of natural resources,efficient use of natural resources,green protection of natural resources,quality life of natural resources and governance status of natural resources,which will be expected to act as a reference for making a developed top-level design of natural resource evaluation,and constructing regional classification,multi-dimensional and multi-indicator of comprehensive evaluation indicator system. Table and Figures | Reference | Related Articles | Metrics

Select

Assessment on Habitat Suitability of Macaca thibetana in Xianxialing Provincial Nature Reserve Using MaxEnt Modeling YU Zhucheng, XU Linli, LUO Shuigen, WANG Meifang, ZHOU Xiao, CHEN Danna, JIN Wei FOREST RESOURCES WANAGEMENT    2023, 0 (2): 111-117.   DOI: 10.13466/j.cnki.lyzygl.2023.02.015 Abstract （146）   HTML （8）    PDF （3775KB）（294）       Knowledge map    Save The Macaca thibetana is an endemic species to China.Assessment on habitat suitability Macaca thibetana is very important for the conservation,which plays an important role in the rational and scientific protection of this species.To improve the conservational strategy,by using the MaxEnt model,this study evaluated and analyzed the habitat suitability based on site data obtained by infrared camera monitoring technology and three environmental factors such as vegetation,terrain,and human interference for the Macaca thibetana in Xianxialing provincial nature reserve in Jiangshan city.The results showed:the MaxEnt model could accurately predict the spatial distribution of habitat suitability for Macaca thibetana.The moderate and high suitable habitats for Macaca thibetana were mainly distributed in the southeast,northeast,and northwest of the Reserve with high altitude and broad-leaved forests.The area of moderate and high suitable habitats was 3 041.10 hm2,accounting for 43.96% of the total area of the Reserve.Factor variable contribution analysis showed that altitude,distance from road,and slope aspect were the main factors affecting habitat quality,with contribution rates of 33.30%,29.40%,and 12.40%,respectively.Based on the results of the distribution of habitat suitability,we suggested that management department should further rationally plan the functional areas of the reserve through preventing the expansion of the bamboo forest area from causing the degradation of the broad-leaved forest,improving the connectivity between the northwest and southwest suitable habitats,and providing a safe and smooth corridor for the migration of the Macaca thibetana population. Table and Figures | Reference | Related Articles | Metrics

Select

Realization Path of High-Quality Development of National Parks TANG Xiaoping FOREST RESOURCES WANAGEMENT    2022, 0 (3): 1-11.   DOI: 10.13466/j.cnki.lyzygl.2022.03.001 Abstract （464）   HTML （26）    PDF （1577KB）（290）       Knowledge map    Save China officially established the first batch of five national parks in 2021,entering a new stage of national park development.By combing the development tasks of five national parks approved by the state,this paper made it clear that the development focus of national park was to build a clear and standardized asset property right system,a unified and efficient ecological governance system,a strong public service system,and an overall and moderate community coordination mechanism.This paper focused on the realization path of high-quality development of national parks from nine aspects: planning and implementation,demarcation and marking,institutional setting,asset supervision,infrastructure,monitoring and perception,public service and community coordination.The state and governments at all levels should provide basic guarantee from the aspects of brand building,institutional system,scientific and technological support and capital investment,so as to provide reference for the development and management of national parks. Table and Figures | Reference | Related Articles | Metrics

Select

Biomass Distribution Characteristics and Carbon Measurement Parameters of Chinese Fir Plantation LAN Xiao, HAO Haikun, HUANG Kaiyong, CHEN Qin, DAI Jun, CHENG Lin, CHEN Shichang FOREST RESOURCES WANAGEMENT    2023, 0 (2): 50-56.   DOI: 10.13466/j.cnki.lyzygl.2023.02.007 Abstract （202）   HTML （13）    PDF （1668KB）（275）       Knowledge map    Save The purpose of this study is to explore the biomass distribution regularity of Chinese fir plantation and establish its biomass prediction model,and to provide a basis for scientific prediction and reasonable evaluation of its carbon sequestration capacity.In the study,the Chinese fir plantations of different ages and different site conditions in the typical cultivation area in Guangxi were selected as the research objects,the characteristics of rhizome ratio,wood basic density,carbon content,biomass conversion and expansion factor were analyzed by means of field biomass survey and indoor measurement.The results showed that the stem biomass of Chinese fir at different ages was the highest (40.00%~67.40%),followed by the root (14.70%~22.70%).The average rhizome ratio was 0.263,and the average wood basic density was 300.5 kg/m3.There was no significant difference in the fitting effect of different relative growth equations on stem,bark,branch,above-ground biomass,underground biomass and total biomass.The average carbon content ofall organs was 50.57%,which increased with the increase of forest age.The relationship between stem biomass and stand volume was the best with power function,and the relationship between above-ground biomass,underground biomass,total biomass and volume was best with hyperbolic model. Table and Figures | Reference | Related Articles | Metrics

Select

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 Abstract （188）   HTML （12）    PDF （3716KB）（270）       Knowledge map    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

Select

A Study on Integration of Forest Stock Data at Different Levels in Forest Inventory and Monitoring ZENG Weisheng, YANG Xueyun, SUN Xiangnan, LIU Qiangyi, ZHANG Yuchao FOREST RESOURCES WANAGEMENT    2022, 0 (4): 13-19.   DOI: 10.13466/j.cnki.lyzygl.2022.04.003 Abstract （330）   HTML （14）    PDF （985KB）（269）       Knowledge map    Save It is necessary to conduct national and local integrated forest resources inventory and monitoring,and implement decomposition of provincial forest stock data to prefecture,county,and township level,and even every forest stand polygon,for promoting the supervision and assessment of forest chief system at all levels.Based on the data of forest resources inventory and monitoring in recent years in Beijing,the procedure for implementing decomposition of forest stock data into all stand polygons was presented,where the amount of municipal forest stock was taken as the total for control,and forest volume prediction model and simultaneous models of three forest stocks (volume stock,biomass stock and carbon stock)were applied.Given the data of forest resources planning and designing inventory for reference,the joint estimation method could be adopted to adjust the data of prefecture and county level appropriately,while the errors of different data need to be considered as a whole.Through the establishment of forest volume prediction model and simultaneous models of three forest stocks in Beijing,the forest volume,biomass and carbon storage of Beijing in 2021 were decomposed to district,and township level and every forest stand polygon,realizing the integration of stock data at municipality,district and township level.It is showed that the method of applying modeling technology to decompose three forest stocks into forest stand polygons presented in this study is feasible in practice. Table and Figures | Reference | Related Articles | Metrics

Select

A Provincial-Municipal-County Integrated Forest Carbon Storage Estimating Technology System —Take Guangdong Province as an Example XUE Chunquan, CHEN Zhenxiong, YANG Jiazhi, ZENG Weisheng, LIN Liping, LIU Ziwei, ZHANG Hongai, SU Zhiyao FOREST RESOURCES WANAGEMENT    2022, 0 (4): 157-163.   DOI: 10.13466/j.cnki.lyzygl.2022.04.020 Abstract （290）   HTML （7）    PDF （1094KB）（267）       Knowledge map    Save The purpose of this study is to establish the integrated province-city-county forest carbon storage estimation technology system of Guangdong,and provide a method reference for local government to measure forest carbon storage.This study used forest sample plot survey data of the ninth national forest resources continuous inventory of Guangdong Province in 2017,established a simultaneous prediction model with forest volume,biomass and carbon storage as target variables,and stand basal area and stand average height as explanatory variables,each model's determination coefficient R2 was above 0.94,MPE average forecast error was less than 3%.The average percentage standard error (MPSE)was less than 15%,and the evaluation indexes showed that the model had high practicability.Based on the sub-class data of 2018 second-class forest resources survey in Guangdong Province,supported by model technology and data coupling technology,the forest reserves of Guangdong Province were translated into forest map patterns in forest resources archive data,and then aggregated into villages,towns,counties,cities and provinces step by step,realizing provincial-city-county integration under the national framework system.The results showed that the system coupling method of carbon storage estimation technology established was scientific and feasible,and the prediction model had high accuracy,which could be popularized and applied in the assessment and evaluation of carbon neutralization goals of provinces,cities and counties. Table and Figures | Reference | Related Articles | Metrics

Select

Coupling Coordination Relationship between Forest Resources Protection and Green Development and its Obstacle Factors HUANG Zhijun FOREST RESOURCES WANAGEMENT    2022, 0 (3): 122-128.   DOI: 10.13466/j.cnki.lyzygl.2022.03.019 Abstract （244）   HTML （1）    PDF （1387KB）（250）       Knowledge map    Save Based on panel data of 30 Provinces in China from 2011 to 2020,this paper used entropy method,coupling coordination degree model and obstacle degree model to explore the coupling coordination relationship between forest resources protection and green development and its obstacle factors.The results showed that the overall coupling coordination level of forest resources protection and green development showed a steady and slow upward trend,and the coupling and coordination level continued to be slightly unbalanced,and the continuous lag of forest resource protection and green development was the key to restrict their further coordinated development.There were obvious differences in the coupling coordination degree among the seven regions,north China,east China and northeast China were nearly disorder,while southwest China,south China,northwest China and central China were mildly disorder.In north China,where the level of forest resources protection and green development had a high level of coupling coordination,there were low levels of regional coupling coordination with both low or unbalanced development levels;The per capita forest stock,the proportion of plantation area in the forest area,and the passenger volume of public transport per 10,000 urban people were the main factors restricting the coordinated development of the two systems.Finally,some suggestions were put forward to promote forest resources protection and green development. Table and Figures | Reference | Related Articles | Metrics