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 3 years

Please wait a minute...


For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails

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 （395）   HTML （20）    PDF （1271KB）（1341）       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

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 （3097）   HTML （266）    PDF （1091KB）（1335）       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

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 （413）   HTML （16）    PDF （4757KB）（928）       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

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 （413）   HTML （31）    PDF （972KB）（911）       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

Biomass Carbon Stocks and Carbon Stock Economic Value of Forests in Beijing ZHANG Feng, PENG Zuodeng FOREST RESOURCES WANAGEMENT    2021, 0 (6): 52-58.   DOI: 10.13466/j.cnki.lyzygl.2021.06.009 Abstract （1026）   HTML （74）    PDF （1734KB）（737）       Knowledge map    Save Based on the forest inventory data of Beijing from the seventh (2004-2008),the eighth (2009-2013) and the ninth (2014-2018),the continuous biomass expansion factor method was used to evaluate the dynamic changes of forest carbon stocks in Beijing during 2004-2018,and the carbon tax assessment method was used to estimate the economic value of the forest carbon sink in Beijing from 2004 to 2018. The results showed that: the forest carbon storage in Beijing was 7.09Tg from 2004 to 2008,9.43Tg from 2009 to 2013,and 15.39Tg from 2014 to 2018. The forest carbon density was 19.94,21.97,and 24.75t/hm2,respectively. The young forest accounted for the highest proportion of total carbon storage,accounting for 52.04%,47.64% and 53.42% in the three inventory periods respectively,while middle forest accounted for 23.05%,24.78% and 21.00% in the same period respectively. The economic value of forest biomass carbon sink in Beijing was 5.075 billion yuan between 2004 to 2008,5.725 billion yuan between 2009 to 2013,and 7.652 billion yuan between 2014 to 2018,the annual increment of economic value of forest biomass carbon sink in 15 years was 171.8 million yuan. The carbon stocks and carbon stock economic value of the forest resources in Beijing showed an increasing trend,but the proportion of young forest and middle forest was relatively high,and the carbon density of forests was low,so the scientific cultivation and management of the forest should be strengthened in order to continuously improve the function and value of the forest carbon sink. Table and Figures | Reference | Related Articles | Metrics

Select

Difference Analysis and Integration between Forest Resources Management "One Map" and the Third National Land Survey CHENG Weiya, ZHANG Zhuoman, WANG Han, JIANG Haiming, JI Min, LI Yinlong FOREST RESOURCES WANAGEMENT    2021, 0 (6): 6-11.   DOI: 10.13466/j.cnki.lyzygl.2021.06.002 Abstract （2745）   HTML （127）    PDF （2114KB）（704）       Knowledge map    Save Realizing the substantive integration of basic investigation and special investigation is an important content of natural resources investigation.In order to solve the problems of inconsistent concepts,overlapping contents and contradictory indicators of forest land survey data among different departments,this paper took Huangdao District of Qingdao Citys an example,integrated the "one map" of forest resources management and the data of the third national land survey,and deeply analyzed the differences between them from the perspectives of achievement data,survey boundary,classification standard and survey content.Based on the causes of differences,this paper put forward corresponding solutions and discussed the final data fusion technology,so as to provide effective references for the unified investigation of natural resources. 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 （616）   HTML （11）    PDF （8599KB）（689）       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

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 （198）   HTML （7）    PDF （2297KB）（646）       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 （394）   HTML （20）    PDF （1228KB）（612）       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 （240）   HTML （9）    PDF （1023KB）（567）       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

Prediction of Potential Distribution and Climate Change of Rare Species Cephalotaxus oliveri LIU Zengli, HU Lile FOREST RESOURCES WANAGEMENT    2022, 0 (1): 35-42.   DOI: 10.13466/j.cnki.lyzygl.2022.01.005 Abstract （654）   HTML （16）    PDF （2243KB）（556）       Knowledge map    Save Cephalotaxus oliveri is an II-class national protection of wild plant and a tertiary relic species in China. Understanding its distribution range and its response to climatic factors is helpful to protect the species under climate change. In this study,geographical distribution records from literature and specimen was used to analyze the potential geographical distribution of C.oliveri in China through MaxEnt model. Moreover,based on CMIP6 date from Digital Terrain of China,C. oliveri potential distribution under four climate change scenarios in the following 80 yearswas predicted. The results showed that:1) precipitation in the driest month,slope and annual precipitation were the main climatic factors affecting the distribution of C.oliveri. 2)Under the current climate conditions,highly suitable habitat for C. oliveri accounted for 1.7% of the area of China,mainly concentrated in the southwest edge of the Sichuan Basin,Wuling Mountains - Shennongjia,Xuefeng Mountain,Nanling,Luoxiao Mountain,Dabie Mountain,mountains in Southern Anhui - Tianmu Mountain,Wuyi Mountain - mountains in Southern Zhejiang,Daiyun Mountain and Central Mountains in Taiwan. However,under current climatic conditions,the southwest population (located in Yunnan Province) was not in the range of highly suitable habitat,which may be related to the relatively few definite distribution points and microhabitat effects in the local.3)Overall,the response of C.oliveri distribution to future climate (warm and humid) would be insensitive. Under the four scenarios of climate change,the model predicted that the spatial distribution of highly suitable habitat of the species would not change significantly. The area of low,medium,highly suitable habitat and all degree of suitable habitat would generally increase. The most highly suitable habitat of the species would slightly change under future climate except the SSP245 scenario,which would decrease continually. Table and Figures | Reference | Related Articles | Metrics

Select

Forest Resources Status and Management Strategy in Beijing Plain Area WEI Yankui FOREST RESOURCES WANAGEMENT    2022, 0 (2): 10-18.   DOI: 10.13466/j.cnki.lyzygl.2022.02.002 Abstract （567）   HTML （9）    PDF （1069KB）（554）       Knowledge map    Save The plain area of Beijing is the main carrying area of the core capital functions and the urban functions. The forest in the plain area plays an important role for the health of residents and the development of various undertakings in the capital. The development of forest resources in Beijing plain area experienced recovery period,wandering period,steady development period and rapid development period. The present situation of plain forest resources was analyzed from the aspects of forest area,stock,forest species,age group and tree species composition. The change trend of plain forest area,stock,forest coverage rate and tree species composition from 2009 to 2019 was analyzed. It was concluded that the ecological pattern of the plain was basically formed,the resource structure of "more forest belts,less forest patches" was changed,the uniformity of ecological spatial distribution was improved,and the richness of forest landscape was increased.The situation and requirements of forest management in plain area in the new era were analyzed from three aspects:requirements of new urban general regulations,citizens' demand for beautiful environment and high-quality development of landscape in the new era.Through analysis and discussion,countermeasures and suggestions were put forward for forest management in Beijing plain area. Table and Figures | Reference | Related Articles | Metrics

Select

Status Analysis and Restoration Suggestions of Degraded Forest in Three-North Engineering Area of Inner Mongolia DUAN He, ZHANG Jianbo, ZHANG Zhongwang FOREST RESOURCES WANAGEMENT    2022, 0 (1): 174-179.   DOI: 10.13466/j.cnki.lyzygl.2022.01.021 Abstract （562）   HTML （13）    PDF （1179KB）（552）       Knowledge map    Save In order to accurately grasp the distribution of degraded forest land in the Three-North Shelterbelt Project area of Inner Mongolia,promote the construction of the Three-North Shelterbelt Project,and continuously improve the quality of forest resources and the ecological environment in the Three-North Shelterbelt Project area of Inner Mongolia,Forestry and Grassland Bureau of Inner Mongolia Autonomous Region organized the survey of degraded forest land in the Three-North Shelterbelt Project area in 2021. The results showed that the area of degraded forest in the Three-North Project area was 3019432.30 hectares,of which 16.86% and 83.14% were degraded forest and degraded shrub land. The main reasons for forest degradation were physiology,site,disaster and human activities. The area of forest degradation caused by physiology and disaster accounted for 45.81% and 38.13% respectively. Mildly degraded,moderately degraded,and severely degraded areas accounted for 0.88%,64.86% and34.26 %,respectively. The degraded forests were mainly distributed in the western part of Inner Mongolia,and further measures such as renewal,restoration,tending,enclosure and habitat restoration should be taken to restore the degraded forests so as to maintain the achievements of regional ecological construction. Table and Figures | Reference | Related Articles | Metrics

Select

Study on Phenotype and Adaptability Evaluation of Cold-Tolerant Fern in Beijing HE Guoxin FOREST RESOURCES WANAGEMENT    2022, 0 (2): 82-90.   DOI: 10.13466/j.cnki.lyzygl.2022.02.012 Abstract （771）   HTML （4）    PDF （5738KB）（531）       Knowledge map    Save The main problems existing in Beijing plain area are as follows:the landscape of uniform tree species is lack of vertical layer especially in ground cover plants,let alone pay attention to species diversity and density,as well as seasonal colors.There are few ground cover species in high canopy forests,and the phenomenon of understory blank is prominent.To enrich the diversity of ground cover plants under forests,10 cold resistant fern varieties were introduced to carry out adaptability research tests such as cold tolerance,negative tolerance and cold tolerance. Four varieties of fern,including Mexicans fern,Banas fern,Japanese color leaf fern and Ostrich fern,suitable for understory planting in Beijing Plain were selected.The evaluation indexes and methods of the adaptability of the introduction and cultivation of cold resistant fern were summarized. The screening and evaluation experiment of cold resistant fern enrich the species of ground cover plants,and provide more choices for high-quality landscape construction of the capital. 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 （1041）   HTML （209）    PDF （995KB）（505）       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 （347）   HTML （29）    PDF （4802KB）（496）       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

Study on the Characteristics and Relationship of Soil Moisture and Litter Fall of Three Vegetation Types in Ai-lao Mountain ZHU Xiuwen, GUO Zihao, YANG Shuangna, GONG Hede FOREST RESOURCES WANAGEMENT    2022, 0 (1): 43-51.   DOI: 10.13466/j.cnki.lyzygl.2022.01.006 Abstract （736）   HTML （17）    PDF （1500KB）（487）       Knowledge map    Save In the Ai-lao Mountain Nature Reserve,Pu'er City,Yunnan Province,this research selected three vegetation types as the objects,including mid-montane moist evergreen broad-leaved forest,mountain top mossy coppiceforest and secondary forest of Populus Yunnanensis,and measured 10-50cm,70cm,90cm,110cm,130cm and 150cm soil moisture content by TDR time domain reflectometer,collected the dry weight of litter (leaf,branch,flower and fruit,bark,moss lichen and other litter) to analyze soil moisture and litter features of different vegetation types and the relationship between them. The results showed that: 1) The soil moisture,as a whole,was represented by the middle-mountain moist evergreen broad-leaved forest>secondary forest of Populus Yunnanensis>mountain top mossy coppice forest. 2) Litter of 3 vegetation types,except for the dry weight of branches and bark,all had significant differences (P<0.05),and the composition of litter was similar,mainly composed of branches and leaves. 3) In the mid-mountain moist evergreen broad-leaved forest,the soil water content only had a very significant positive correlation with the dry leaf weight (P<0.01);in the mountain top mossy coppice,the soil water content only had the negative correlation with the dry weight of moss lichen,and was positively correlated with other indicators;the soil water content in the secondary forest of Populus yunnanensis was negatively correlated with the dry weight of leaf and moss lichen,and positively correlated with the other indicators. RDA analysis results of moss lichen,leaf dry weight and other litter dry weights had greater influence on the soil moisture content of the three vegetation than the dry weight of flowers,fruits,bark and dead branches;in soil moisture content of mid-montane humid evergreen broad-leaved forest,the fitting effect with the total amount of litter was better than that of the other two,which was y=78.601x+35.374.The cultivation of evergreen broad-leaved forest is conducive to the conservation of soil water resources in the mountains. Table and Figures | Reference | Related Articles | Metrics

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 （465）   HTML （53）    PDF （1248KB）（483）       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

Development of Carbon Growth Models and Analysis of Carbon Sequestration Capacity for Larch Forest Stands in the Northeast of China ZENG Weisheng FOREST RESOURCES WANAGEMENT    2022, 0 (1): 18-23.   DOI: 10.13466/j.cnki.lyzygl.2022.01.003 Abstract （670）   HTML （23）    PDF （1299KB）（472）       Knowledge map    Save On the background of implementing the strategy of carbon peak and carbon neutralization,the carbon sequestration capacity of forest ecosystem has become the focus of attention. Based on the carbon storage data of 1 091 sample plots from the 9th national forest inventory in three provinces of northeast China,the carbon growth models of both natural and planted larch forest stands were developed,the impacts of topographic and soil factors to model parameters were analyzed,and the differences of carbon sequestration capacity between natural and planted larch forest stands were compared. The results showed that 1) the annual carbon growth (AG) of planted larch forest stands reached to the highest 2.70 t/hm2 at 12 years old,and the mean carbon growth (MG) reached to the highest 1.85 t/hm2 at 20 years old;while the AG of natural stands reached to the highest 0.94 t/hm2 at 18 years old,and the MG reached to the highest 0.78 t/hm2 at 32 years old;2) when forest stand age was 30,the mean carbon storage per hectare of planted larch forest stands was up to 49.36t/hm2,which was 111%higher than 23.37t/hm2 of natural stands;and when forest stand age was 50,that of planted stands was up to 55.47t/hm2,which was 53%higher than 36.30t/hm2 of natural stands;3)the developed carbon growth models for both natural and planted larch forest stands reflected objectively the overall average growth process of carbon storage in three northeast provinces,of which mean prediction errors were about 5%,total relative errors were nearly to zero for modeling and less than 2% for cross-validation;4) the impacts of topographic and soil factors to the growth of planted larch forest stands were not significant,only slope position had significant impact to the growth of natural stands;the carbon sequestration capacity of planted larch forest stands was obviously higher than the natural stands. Table and Figures | Reference | Related Articles | Metrics

Select

Method and Enlightenment of 2020 Global Forest Resources Assessment Remote Sensing Survey WANG Wei, YANG Jing, GAO Xianlian, ZENG Weisheng FOREST RESOURCES WANAGEMENT    2021, 0 (6): 1-5.   DOI: 10.13466/j.cnki.lyzygl.2021.06.001 Abstract （907）   HTML （74）    PDF （1229KB）（460）       Knowledge map    Save From 2019 to 2020,China participated in the 2020 Global Forest Resources Assessment Remote Sensing Survey (FRA2020 RSS) organized by the United Nations Food and Agriculture Organization(FAO),and completed the tasks within China. This article described the development process of the global forest resources assessment,introduced the system framework and technical methods of FRA2020 RSS,and analyzed the reflection and enlightenment of FRA2020 RSS on the construction of an integrated forest resources monitoring system in China. Table and Figures | Reference | Related Articles | Metrics