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    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
    Abstract267)   HTML7)    PDF (1271KB)(778)       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.

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    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
    Abstract2015)   HTML183)    PDF (1091KB)(910)       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.

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    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
    Abstract224)   HTML14)    PDF (972KB)(457)       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 ".

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    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
    Abstract315)   HTML7)    PDF (4757KB)(644)       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.

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    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
    Abstract180)   HTML12)    PDF (3716KB)(229)       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.

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    Analysis on the Spatial Distribution Characteristics of Representative Populations in Tropical Rainforest of Hainan
    WU Tingtian, CHEN Yiqing, CHEN Zongzhu, LEI Jinrui, CHEN Xiaohua, LI Yuanling
    Forest and Grassland Resources Research    2023, 0 (5): 133-141.   DOI: 10.13466/j.cnki.lczyyj.2023.05.016
    Abstract57)   HTML1)    PDF (8815KB)(108)       Save

    Representative populations play an innegligible role in ecological early warning and biodiversity conservation1.The assessment of endangered species is the key basis for the priority conservation of biodiversity,analysis on the distribution pattern of representative populations from the perspective of suitable survival area.The results showed that:1)There were 10~25 species of representative populations potentially distributed in most areas of the National Park of Hainan Tropical Rainforest,accounting for 83.86% of the total area.2)The distribution of representative populations was mainly affected by altitude and vegetation type.The overall number of species distribution showd a radiation state of decreasing distribution from high altitude to low altitude,from primary forest to secondary forest and plantation.3)The construction of the National Park of Hainan Tropical Rainforest already opened up the boundary between the original protected areas and greatly promoted the interconnection of the ecosystem.However,there were still large areas of high hotspots of endangered plants that have not been included in the core protected areas.Therefore,more attention should be paid to these areas.The survival status of representative populations directly reflected the current characteristics of tropical rainforest ecosystems to a large extent.The research results can provide reference and theoretical basis for the ecological planning and biodiversity protection of the National Park of Hainan Tropical Rainforest.

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    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
    Abstract258)   HTML1)    PDF (2008KB)(381)       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.

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    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
    Abstract405)      PDF (3140KB)(2017)       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.
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    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
    Abstract515)   HTML9)    PDF (1124KB)(529)       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.

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    Geographic Weighted Regression Model Combined with Remote Sensing for Estimating Forest Aboveground Carbon Storage of Songyang County
    ZOU Weimin, CHEN Chao, HUANG Lei, SONG Meixuan, LI Xuejian, DU Huaqiang
    FOREST RESOURCES WANAGEMENT    2023, 0 (4): 132-140.   DOI: 10.13466/j.cnki.lyzygl.2023.04.016
    Abstract85)   HTML6)    PDF (5877KB)(162)       Save

    Aboveground carbon(AGC)is an important indicator of the basic characteristics of forest ecosystems and a theoretical basis for evaluating the functional structure and productive potential of forests.As one of the nine key forestry counties in Zhejiang Province,Songyang County has a very important ecological status,so the accurate estimation of forest AGC in Songyang County is an important reference value for the stability evaluation of forest ecosystems and forest management in Songyang County.However,Songyang County is dominated by medium and low hilly areas surrounded by mountains,and how to consider the influence of complex terrain on the temporal and spatial variation of AGC is an urgent problem to be solved to achieve accurate estimation of AGC in mountainous forests.Therefore,based on Landsat TM satellite imagery and forest AGC survey data in Songyang County,a geographically weighted regression model(GWR)combined with spatial variation characteristics was constructed to estimate forest AGC,and compared with the results of ordinary least squares(OLS),finally,the optimal model was selected to predict forest AGC and its spatial distribution in Songyang County.The results were asfollows:Texture information from Landsat TM satellite imagerywas important for predicting forest AGC in Songyang County;The GWR model accurately estimated the AGC and spatial distribution of forests in Songyang County,and improved the accuracy by 9% over the OLS model,with an R2 of 0.71.The total AGC of forests in Songyang County was 3.901×106 Mg,with an average AGC of 23.70 Mg/hm2,accounting for about 10% of the total AGC of forest vegetation in Lishui City,which had a relatively important position in serving regional ecological functions.The study will provide advanced technical tools for accurate estimation of forest AGC in Songyang County,as well as scientific data for evaluating the function of forest carbon sink in Songyang County.

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    Research on Pathways and Strategies for the Value Realization of Forest,Grassland and Wetland Carbon Sink Products
    LI Qing, GOU Lihui, ZHENG Qianhui, YANG Yu, XIA Chaozong
    Forest and Grassland Resources Research    2023, 0 (6): 18-26.   DOI: 10.13466/j.cnki.lczyyj.2023.06.003
    Abstract72)   HTML6)    PDF (1094KB)(71)       Save

    Realizing the value of forest,grassland and wetland carbon sink products is a crucial means of realizing ecological product value.Accelerating the realization of value in these products not only incentivizes market entities to engage in ecological environment protection but also contributes to social welfare by driving employment and income growth.Furthermore,it enhances the carbon sink function of ecosystems,thereby supporting the achievement of "dual carbon" goals.Under the impetus of national policies related to ecological restoration and the realization of ecological product value,the pathways for realizing the value of forest,grassland and wetland carbon sink products have continuously evolved and developed.Throughout the country,various regions have explored and established a series of distinctive and replicable pathways and models for realizing the value of these products.This paper reviews the main pathways for realizing the value of forest grassland and wetland carbon sink products,including ecological compensation,carbon trading,innovative developments in carbon finance,and social capital participation in carbon sequestration and sink enhancement.By incorporating the latest statistical data and typical case studies,the paper objectively reflects China's research progress in promoting the value realization of forest grassland and wetland carbon sink products.It analyzes the challenges faced in realizing the value of these products and proposes strategies and recommendations to facilitate their value realization.

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    Regression Relationship Between Root Diameter and DBH of Ulmus pumilain Inner Mongolia
    ZHOU Zhifeng, GUO Qi, ZHANG Xinjie
    FOREST RESOURCES WANAGEMENT    2022, 0 (3): 129-134.   DOI: 10.13466/j.cnki.lyzygl.2022.03.020
    Abstract309)   HTML4)    PDF (1799KB)(131)       Save

    Based on the investigation data of root diameter (D0.05) and DBH (D1.3) of Ulmus pumila in Siziwang Banner,Inner Mongolia,the regression relationship between root diameter and DBH of Ulmus pumila was studied.The results showed that the quadratic function mathematical model of root diameter-DBH was the best,and its optimal application scope was the root diameter of 10~30cm.This study can provide references for the investigation and treatment of deforestation cases in Inner Mongolia,and the supervision and management of forest tending and forest harvesting.

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    Evaluation on Fire Risk Rating of Forest Stands in Wildland-Urban Interface—A Case Study of Guangzhou City
    LUO Dan, WANG Qingfei, CHAO Bixiao, LI Le, HAO Zezhou, LU Yuan, WANG Cheng, WU Ruichen, LIU Feipeng, PEI Nancai
    FOREST RESOURCES WANAGEMENT    2023, 0 (3): 56-64.   DOI: 10.13466/j.cnki.lyzygl.2023.03.008
    Abstract123)   HTML7)    PDF (2042KB)(170)       Save

    Forest fire risk assessment is the basis for fire prevention.Sixteen major forest stand types in Wildland-Urban Interface of Guangzhou City were studied,using terrestrial laser scanning data for precise,non-destructive analysis results to obtain forest stand characteristics and structural indicators.The fire risk of different forest stand types was comprehensively evaluated with 11 factors relating to the fire risk of forest stands via the analytic hierarchy process.The results showed that Eucalyptus forest(EF),Cunninghamia lanceolata forest(CLF) and Castanopsis chinensis forest(CCF) were classified as higher fire risk,specifically,EF with fire risk Class IV,CLF and CCF with fire risk Class III.The fire risk of mixed fir and broad forest,Acacia auriculiformis forest,Liquidambar formosana forest,Cinnamomum camphora forest,Schefflera heptaphylla forest,Castanea henryi forest,Machilus chinensis forest,Acacia auriculiformis forest,Elaeocarpus rugosus forest,Acacia confuse forest,Machilus nanmu forest and broadleaf mixed forest decreased in order.Among them,the mixed fir and broad forest had the highest fire risk in the secondary fire risk forest.The fire risk level of Schima superba forest was classified as Class I,with a low fire risk.By analyzing the stand characteristics and structure of medium and high fire risk forest types,targeted combustible material control and modifications were removed to reduce stand combustibility and to improve the efficiency of forest fire prevention.

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    Estimation of Single Wood Factor of Picea schrenkiana var.tianshanica Forest Based on Backpack LiDAR
    QIU Qin, ZHANG Wenge, WANG Lei, CAO Shanshan, SUN Wei
    FOREST RESOURCES WANAGEMENT    2021, 0 (2): 99-109.   DOI: 10.13466/j.cnki.lyzygl.2021.02.014
    Abstract395)   HTML6)    PDF (4506KB)(339)       Save

    High precision lossless rapid estimation of single wood factor is very important for forest resource monitoring and evaluation.Backpack lidar has good application potential in obtaining 3D forest structure parameters.The study takes Picea schrenkiana var.tianshanica forest as the research object,trying to obtain the point cloud data by backpack LiDAR scanning sample for single wood segmentation and estimation of single wood DBH,tree height and crown area.The accuracy evaluation and correlation test are carried out with the reference of ground measurement and visual interpretation data.The results show that:the precision F values of single wood segmentation using backpack LiDAR data are greater than 0.90,the average accuracy and recall are 0.96 and 0.90,respectively.The average recognition rate is 86.61%.R2 coefficient of determination of DBH and tree height is greater than 0.90,the average value of the DBH root mean square error is 1.11 and the height of the tree is 1.05;R2 coefficient of determination for area estimation of single crown is greater than 0.80,the average value of the root mean square error is 3.21.Therefore,using backpack LiDAR can achieve high precision extraction of single wood DBH and tree height parameters.

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    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
    Abstract122)   HTML7)    PDF (2297KB)(404)       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.

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    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
    Abstract1015)   HTML33)    PDF (999KB)(268)       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.

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    Current Situation and Outlook of the Construction of Forest and Grassland Fire Prevention Infrastructure under the New Situation
    LU Yuan, WANG Guangyu, CHENG Ziyue, YAN Yuqian, ZHANG Heng, WANG Li, YANG Hui, ZOU Quancheng
    Forest and Grassland Resources Research    2023, 0 (6): 1-7.   DOI: 10.13466/j.cnki.lczyyj.2023.06.001
    Abstract78)   HTML10)    PDF (1170KB)(68)       Save

    Forest and grassland fire prevention is a major issue related to safety and development,and a major task for the protection of forest and grass resources.Infrastructure is the hard power of forest and grassland fire prevention work.Strengthening the construction of fire prevention infrastructure and the level of equipment allocation is the fundamental solution to comprehensively improve the comprehensive prevention and control capability of forest and grassland fires in China.This paper put forward the construction idea of how to build forest grassland fire prevention infrastructure under the new situation and made a brief overview of the construction content of related projects,aiming at strengthening the forest grassland fire prevention infrastructure construction.Approaches were provided to for effectively preventing and responding to the threat of forest and grassland fires,especially major fires,as well as for improving the comprehensive prevention and control capacity of forest and grassland fires.

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    Research on Evaluation of Elderly Healing Forest Wellness Base
    JIANG Xuwang, YU Shuhan, LI Yihui, ZHAN Liyu
    FOREST RESOURCES WANAGEMENT    2023, 0 (3): 71-79.   DOI: 10.13466/j.cnki.lyzygl.2023.03.010
    Abstract98)   HTML5)    PDF (1031KB)(127)       Save

    Based on the theory of healing environment and Maslow's hierarchy of needs,and combined with the characteristics of the elderly,the evaluation index system of elderly healing forest wellness base was established,which was composed of 4 primary indicators,23 secondary indicators and 29 tertiary indicators.The primary indicators were landscape resources,environmental quality,facility resources,team service ability and technology.Expert consultation and analytic hierarchy process were used to determine the importance and weight of indexes,and the evaluation grade was divided.Take Longqi Mountain forest wellness base,Geshikao forest wellness base and Mayan forest wellness base as cases,this paper made an empirical study on the three bases by means of questionnaire survey.Results showed that the evaluation index system was scientific and applicable.Longqi Mountain,Geshikao and Mayan forest wellness bases were all in the "comparatively suitable" level.Finally,targeted suggestions were made according to the shortcomings of the three cases,and from five aspects of policy guidance,improvement of evaluation standards,improvement of standing forest quality,strengthening personnel trainingand construction of aging facilities,suggestions were put forward to promote the integrated development of forestry and pension service industry.

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    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
    Abstract279)   HTML18)    PDF (1228KB)(412)       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.

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    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
    Abstract344)   HTML2)    PDF (1037KB)(674)       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.

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