欢迎访问林草资源研究

Top Read Articles

    Published in last 1 year |  In last 2 years |  In last 3 years |  All
    Please wait a minute...
    For Selected: Toggle Thumbnails
    Analysis of Dominant Causes and Rescue Casualties of Forest Fires in China from 2000 to 2022
    WANG Ao, WANG Chenghu, GAO Guiyun, WANG Mingyu
    Forest and Grassland Resources Research    2024, 0 (1): 1-7.   DOI: 10.13466/j.cnki.lczyyj.2024.01.001
    Abstract277)   HTML36)    PDF (1400KB)(197)       Save

    In order to analyze the main causes of forest fires and casualties in China over the past 20 years,based on the case records of forest fire fighting casualties and statistical data on relevant meteorological factors(average temperature,average precipitation,average wind speed)from 2000 to 2022,statistical analysis and correlation analysis method were used to analyze the main causes of forest fire and the main causes of casualties in fire fighting.The results showed:1)From 2000 to 2022,a total of 134,671 forest fires occurred in China.Among these the period of high incidence of forest fires was from 2003 to 2010.Severe climatic conditions were the main cause of forest fires during that period.In the past 10 years,more than 97% of forest fires have been caused by humans.In regions such as Guangxi,Yunnan,and Guizhou where agriculture and forestry are closely integrated,forest fire accidents occur frequently.2)Analysis of typical forest fire fighting cases shows that the accidents resulting in direct casualties caused by geographical environment,combustible conditions,meteorological conditions and fire activities account for the dominant part,while the casualties caused by non-indirect causes such as asphyxia,accidents and improper operation of fire fighting equipment also occasionally occurred.The research shows that the main causes of forest fires in China are meteorological factors and human factors,with casualties primarily resulting from unfavorable natural conditions.The main causes of forest fires and the causes of casualties are elaborated to provide a reference for efficient firefighting,scientific and accurate command.

    Table and Figures | Reference | Related Articles | Metrics
    Spatiotemporal Trends and Influencing Factors of Forest Carbon Stock in Jiangxi Province from 2005 to 2020
    LI Jiao, WANG Bing, WANG Chen, GAO He, WU Huilong, ZHENG Xin, PENG Huafu
    Forest and Grassland Resources Research    2024, 0 (1): 17-24.   DOI: 10.13466/j.cnki.lczyyj.2024.01.003
    Abstract219)   HTML29)    PDF (10240KB)(221)       Save

    Forest ecosystems play a key role in mitigating and adapting to climate change.A comprehensive understanding of the spatiotemporal trends in forest carbon stocks is essential for maintaining the regional carbon balance,predicting the potential of forest carbon stocks,adjusting conservation and management measures.Based on the three remote sensing datasets,forest carbon stock(FCS),land use cover change(LUCC)and digital elevation model(DEM),Mann-Kendall nonparametric test and correlation analysis methods were used to analyze the spatiotemporal trends of forest carbon stock and its response to land use change in Jiangxi Province from 2005 to 2020.The results showed that 1)forest carbon stock in Jiangxi Province showed an upward fluctuating trend,with an average annual growth rate of 12.59%,the minimum value appeared in 2009,which was 5.3×108tC,and the maximum value appeared in 2018,which was 6.5×108tC.2)The carbon stock is increasing in hilly areas in the central and southern parts,while it is decreasing in the lower-altitude northern parts.3)Jiangxi Province shows a decreasing trend in forest area but an increasing trend in forest carbon stocks,mainly due to urban expansion and continued sustainable forest management.4)Ecological protection and restoration measure is one of the main factors that promoting the stable increase of forest carbon stock in Jiangxi Province.In the future,the rich forest resources should be fully developed,and the synergistic efficiency of environmental protection,economic development,and poverty alleviation should be promoted through the development of Chinese Certified Emission Reduction(CCER) forestry carbon sink projects.

    Table and Figures | Reference | Related Articles | Metrics
    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
    Abstract200)   HTML9)    PDF (1094KB)(174)       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.

    Reference | Related Articles | Metrics
    Wildlife Video Object Detection Based on Deep Learning
    WANG Shuai, LU Nan, ZHENG Hong, LI Hui, PENG Jiangui, ZHANG Tong, WEI Yanhua
    Forest and Grassland Resources Research    2024, 0 (1): 34-40.   DOI: 10.13466/j.cnki.lczyyj.2024.01.005
    Abstract181)   HTML17)    PDF (4274KB)(96)       Save

    Ecological sensing terminals represented by infrared cameras provide massive amounts of image and video data for wildlife monitoring research.To improve the problems of low timeliness and limited processing ability in manual recognition of massive data,and to solve the uncertainty of object detection models in practical scenarios affected by multiple factors such as complex backgrounds,multiple targets,light and dark,a wildlife object detection dataset was established using leopard,adult male bharal,and non-adult male bharal as examples.Four classic object detection models,Faster R-CNN,SSD,YOLOv5,and YOLOv8,were compared and analyzed in terms of detection accuracy,detection speed,and detection effectiveness in actual scenarios.The results show that the detection effect and speed of YOLOv5 and YOLOv8 are overall better than Faster R-CNN and SSD.1)YOLOv8 has higher detection accuracy and stronger robustness under multiple interference factors,making it more suitable for scenarios that pursue detection results;2)All four models can meet the real-time video detection needs of ecological perception terminals,but the YOLOv5 model is the lightest and has the fastest detection speed,making it more suitable for scenarios with limited computability that pursue detection speed.YOLOv5 and YOLOv8 have superior performance and are suitable for detecting wildlife video targets in practical scenarios.

    Table and Figures | Reference | Related Articles | Metrics
    Advances in Remote Sensing Retrieval of Forest Aboveground Biomass
    REN Xiaoqi, HOU Peng, CHEN Yan
    Forest and Grassland Resources Research    2023, 0 (6): 146-158.   DOI: 10.13466/j.cnki.lczyyj.2023.06.018
    Abstract179)   HTML12)    PDF (1148KB)(132)       Save

    Forest aboveground biomass is one of the key indicators to reflect the status of forest ecosystem,which is of great significance to global climate change and China's carbon peak and carbon neutrality.With the rapid development and increasing maturity of remote sensing technology,it has become the main technical means for retrieving above-ground forest biomass in large areas.In this paper,the research progress of remote sensing inversion of forest aboveground biomass was discussed from two aspects through systematic review of relevant literatures at home and abroad.From the perspective of data source,it can be summarized as inversion methods of optical remote sensing data,synthetic aperture radar data and LiDARdata,and the effective information,advantages and limitations provided by each data source are expounded and analyzed.From the perspective of inversion model,it can be summarized as multiple regression model,machine learning algorithm and mechanism model,and the characteristics of different models are discussed and analyzed combined with practical application cases.Finally,this paper summarized the existing problems in the inversion of forest above-ground biomass by remote sensing,and prospected the direction and hotspots of forest above-ground biomass inversion by remote sensing in the future.

    Table and Figures | Reference | Related Articles | Metrics
    The Value,Existing Problems and Development Suggestions of China's National Park Concession System
    WANG Tianwei, LIU Rui
    Forest and Grassland Resources Research    2023, 0 (6): 8-17.   DOI: 10.13466/j.cnki.lczyyj.2023.06.002
    Abstract172)   HTML15)    PDF (1039KB)(228)       Save

    The national park concession system is an innovation of Chinese government concessions in the field of ecological civilization construction,which not only injects funds into the construction of national parks,but also improves the quality of public services through market competition mechanism.It not only implements the basic goal of the public interest of national parks to protect the ecological environment,but also protects the personal interests of indigenous residents.However,in the process of implementation,the national park concession system still faces problems such as the questionable nature of the concession agreement,the defects of the access mechanism and the lack of systematic regulation of the exit mechanism,which hinders the effectiveness of the concession system.On this basis,the franchise agreement should be given the dual nature of both "administrative" and "civil",with an administrative license at the stage of agreement conclusion and a civil contract at the stage of agreement implementation;The franchise access mechanism should be further improved by establishing a franchise management advisory committee,restricting the use of priority renewal rights,and introducing a "negative list" management model.And through the establishment of a temporary takeover system,improve the franchise supervision system and other ways to establish an exit mechanism.

    Reference | Related Articles | Metrics
    Remote Sensing Inversion of Mangrove Biomass Based on Machine Learning
    HAO Jun, LYU Kangting, HU Tianqi, WANG Yunge, XU Gang
    Forest and Grassland Resources Research    2024, 0 (1): 65-72.   DOI: 10.13466/j.cnki.lczyyj.2024.01.009
    Abstract171)   HTML24)    PDF (3014KB)(143)       Save

    Accurately investigating mangrove biomass is beneficial for evaluating the carbon sink potential of mangrove ecosystems.Based on field survey data,Landsat 8 remote sensing images and DEM data,22 feature variables were extracted to carry out remote sensing inversion of mangrove biomass in the Ximen Island,which used three machine learning methods:Random Forest(RF),Support Vector Machine model(SVM)and eXtreme Gradient Boosting(XGBoost).The results showed:1)Compared to the RF model and SVM model,the XGBoost model had a better estimation performance(R2=0.932,ERMS=0.514 t/hm2,EMA=0.313 t/hm2),which could more accurately estimate the mangrove biomass.2)Among the 10 important characteristic factors selected by Recursive Feature Elimination(RFE),the vegetation index has a relatively high importance in estimating mangrove biomass.3)The biomass inversion map of the XGBoost model,which is composed of 10 important characteristic factors,showed that the estimated mangrove biomass ranges from 9.138 to 29.229 t/hm2,which was similar to the findings of the field survey.It can be seen that the XGBoost algorithm shows good application capabilities in mangrove biomass.This research will provide a technical reference for the accounting of carbon storage in the Chinese mangroves.

    Table and Figures | Reference | Related Articles | Metrics
    Characteristics and Influencing Factors of Soil Organic Carbon in Typical Vegetation in the Qilian Mountains
    JIANG Shengxiu, ZHAO Peng, ZHANG Junnian, LI Delu, LIU Zixi
    Forest and Grassland Resources Research    2024, 0 (2): 1-7.   DOI: 10.13466/j.cnki.lczyyj.2024.02.001
    Abstract169)   HTML16)    PDF (1521KB)(75)       Save

    By exploring the spatial distribution characteristics and influencing factors of soil organic carbon in the typical vegetation of the Qilian Mountains,we aimed to provide a scientific basis for evaluating the carbon sequestration effects of forest soil in the region.Using converted cultivated land as a control,five typical vegetation types were studied:grassland,natural trees(Picea crassifolia,Sabina przewalskii),artificial trees(Larix gmelinii)and shrub.Soil organic carbon content,organic carbon density,soil grades,pH,electrical conductivity,total nitrogen,total potassium,and total phosphorus were measured at depths of 0-100 cm compare and analyze the distribution differences and main influencing factors of organic carbon components in different vegetation soils.Results showed:1)The average soil organic carbon content and organic carbon density under different vegetation types were as follows:P.crassifolia(5.99 g/kg,3.43 kg/m2,respectively)>S.przewalskii(5.59 g/kg,2.76 kg/m2,respectively)>L.gmelinii(2.91 g/kg,2.16 kg/m2,respectively)>shrub(1.83 g/kg,2.08 kg/m2,respectively)>grassland(1.66 g/kg,2.00 kg/m2,respectively)>abandoned lands(1.16 g/kg,1.33 kg/m2,respectively).2)With soil layer deepening,the overall organic carbon content of different vegetation soils tended to decrease,while the density of soil organic carbon showed a trend of first increasing and then decreasing.3)In the 0-100 cm soil layer,the soil C/N content of different vegetation types ranged from 9.30 to 15.73,with mean values as follows:P.crassifolia(14.96)>grassland(11.66)>abandoned land(11.54)>shrub(10.83)>L.gmelinii(10.69)>S.przewalskii(10.63).4)Organic carbon and total nitrogen content in different vegetation types showed a highly significant positive correlation(P<0.01),and a highly significant or significant positive correlation with total phosphorus,clay,and silt(P<0.01,P<0.05),a highly significant or significant negative correlation with sand content(P<0.01,P<0.05),and a significant negative correlation with pH(P<0.05).Thus the soil organic carbon retention capacity of natural trees in the Qilian Mountains is superior.Future carbon sequestration forestry construction should consider factors affecting soil organic carbon and prioritize dominant vegetation.

    Table and Figures | Reference | Related Articles | Metrics
    The Franchising Development Path of the Hainan Tropical Rainforest National Park Based on the Recreation Opportunity Spectrum
    GENG Songtao, SUN Kexin, SONG Liangan, YAN Rong
    Forest and Grassland Resources Research    2024, 0 (1): 8-16.   DOI: 10.13466/j.cnki.lczyyj.2024.01.002
    Abstract167)   HTML14)    PDF (1138KB)(104)       Save

    The establishment of a national park system is a key reform task put forward by the Third Plenary Session of the 18th CPC Central Committee.It is an important element in the systems for promoting ecological progress.Exploring the path of high-quality development of national park franchising is of great significance in promoting the transformation and upgrading of national park recreation,improving quality and efficiency,and promoting the construction of China ecological civilization.It takes Hainan Tropical Rainforest National Park as the research object.Based on the theory of recreation opportunity spectrum,it clarifies the relationship between the utilization of recreation opportunities and franchising.Applying the factor analysis method and group decision-making hierarchical analysis method,it constructs the evaluation indicator system of recreation opportunities to evaluate the recreation opportunity levels of the seven areas of Hainan Tropical Rainforest National Park.The recreation opportunity spectrum of Hainan Tropical Rainforest National Park has been formalized.The high-quality development path of franchise in Hainan Tropical Rainforest National Park is proposed to reconstruct the franchise mode,enhance the effectiveness of management services,optimize the fund management system,establish a common sharing mechanism,and improve the multi-dimensional supervisory system.This is aimed at providing scientific guidance and useful references for the franchise of national parks and realizing the value-added of the brand of national parks.

    Table and Figures | Reference | Related Articles | Metrics
    Assessment of Ecosystem Services in Helan Mountain National Nature Reserve in Ningxia
    LI Huijie, LI Wanting, WANG Bing, NIU Xiang, LIANG Yongliang, LI Jingyao
    Forest and Grassland Resources Research    2024, 0 (1): 25-33.   DOI: 10.13466/j.cnki.lczyyj.2024.01.004
    Abstract167)   HTML16)    PDF (3713KB)(164)       Save

    Ecosystem service functions can promote harmony between human and nature.Exploring the ecosystem service functions of Helan Mountain National Nature Reserve is of great significance for adopting a holistic approach to conserving and management our mountains,rivers,forests,farmlands,lakes,grasslands,and deserts.Based on a series of national standards for long-term observation research and service function evaluation of forest and grassland ecosystems,as well as applying a distributed calculation method based on forestry compartment data,we selected five forest and grassland ecosystem service functions,namely,soil conservation,forest nutrient sequestration,water conservation,carbon sequestration and oxygen release,atmospheric purification to assessed their benefits in terms of physical quality and value quantity.The results show that the physical quality of forest and grassland ecosystem services in the Helan Mountain National Nature Reserve in Ningxia present present a spatial distribution pattern of high in the northeast and low in the southwest;the total value is 2.827 billion yuan/a,of which the functions of water conservation and soil conservation in the top two.There are the main services function of forest and grassland ecosystems in Ningxia Helan Mountain national Nature Reserve.The Helan Mountain National Nature Reserve should further strengthen forest management,optimize tree species and age structures,enhance the quality of forest ecosystems,and fully leverage the ecosystem services.

    Table and Figures | Reference | Related Articles | Metrics
    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
    Abstract166)   HTML15)    PDF (1170KB)(144)       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.

    Table and Figures | Reference | Related Articles | Metrics
    Effects of Different Crown Density of Hevea brasiliensis Plantations on the Growth Characteristics of Aquilaria sinensis Saplings under Interplanting
    ZHANG Fanglan, WU Shaozhong, XU Jianhui, SHA Linhua, LI Zhaojia, FANG Fazhi
    Forest and Grassland Resources Research    2024, 0 (1): 143-150.   DOI: 10.13466/j.cnki.lczyyj.2024.01.018
    Abstract137)   HTML15)    PDF (1192KB)(76)       Save

    In order to explore and screen out Hevea brasiliensis(Willd.ex A.Juss.)Muell.Arg stand suitable for intercropping of Aquilaria sinensis(Lour.)Spreng.Aquilaria sinensis saplings were interplanted in three different crown densities(0~0.1,0.2~0.3,0.7~0.8,respectively)Hevea brasiliensis plantations.The morphological indexes,total biomass dry weight,physiological and biochemical indexes of Aquilaria sinensis saplings in the experimental plantations were determined.Principal component analysis was used to analyze the response information of each index of Aquilaria sinensis saplings to Hevea brasiliensis forests with different crown densities.The Hevea brasiliensis forests suitable for the growth of Aquilaria sinensis saplings were selected by comparison.Results show :1)The Hevea brasiliensis plantation with a crown density of 0.2~0.3 had the highest growth rate of morphological indexes,the highest dry weight of total biomass,the total chlorophyll content,soluble protein content and catalase activity of Aquilaria sinensis saplings,which were significantly higher than those of the other two Hevea brasiliensis plantations.The malondialdehyde content was low,and the soluble sugar content and superoxide dismutase activity were not significantly different from those of the other two Hevea brasiliensis plantations.2)In Hevea brasiliensis plantations with a crown density of 0.7~0.8,the growth of Aquilaria sinensis saplings was the worst,and the total biomass dry weight was the lowest.3 )The growth of Aquilaria sinensis saplings was moderate in Hevea brasiliensis forest with a crown density of 0~0.1.4)Principal component analysis showed that the comprehensive score of each index of Aquilaria sinensis saplings interplanted in Hevea brasiliensis plantations with a crown density of 0.2~0.3 was the highest.Therefore,the 3-year-old Hevea brasiliensis plantationswith a crown density of 0.2~0.3 was more suitable for mixed intercropping of Aquilaria sinensis saplings.

    Table and Figures | Reference | Related Articles | Metrics
    Remote Sensing Estimation of Average Diameter at Breast Height of Forest Stands Based on Airborne LiDAR and Machine Learning Algorithms
    TANG Jiajun, CHAI Zongzheng
    Forest and Grassland Resources Research    2024, 0 (1): 56-64.   DOI: 10.13466/j.cnki.lczyyj.2024.01.008
    Abstract121)   HTML13)    PDF (24658KB)(117)       Save

    In order to explore the prediction accuracy of different models on the average diameter at breast height of forest stands,airborne LiDAR point cloud data and ground measured sample plot datawere obtained simultaneously by the Machang working area of Guihua State-owned Forest Farm in Guizhou Province.By extracting point cloud feature variables at the sample plot level,a machine learning model is used toestimate the average diameter at breast height of the sample plot,variance inflation factor analysis and Pearson correlation test are used to select independent variables.The results indicate that:1)Point cloud feature variables show a strong correlation with the average diameter at breast height of the forest stand,such as the average canopy height and height skewness.2)Machine learning models(random forest,support vector machine,nearest neighbor algorithm)outperform multiple linear regression models,with random forest having the best fitting performance.The determination coefficient(R2) for the random forest model is 0.71,withthe root mean square error(RMSE)of 2.50.3)The difference between the predicted and actual average diameter at breast height of four forest types:Cryptomeria forest,mixed coniferous forest,mixed coniferous and broad-leaved forest,and Pinusmassoniana forest further confirms that the random forest model has the highest accuracy and the best fitting effect.In summary,it is feasible to extract point cloud feature variables using airborne LiDAR point cloud data and construct a forest average diameter estimation model based on machine learning algorithms.The accuracy of this method meets the application requirements of forest resource investigation and can be used as a technical means to assist in forestry investigation work.

    Table and Figures | Reference | Related Articles | Metrics
    Construction of a Carbon Storage Measurement Model for Eucalyptus Canopy in Guangxi Based on Drone Oblique Photography
    ZHU Zan, WANG Yongjun, WANG Jianqi, XU Yulan, QIU Xinqi, WAN Xi
    Forest and Grassland Resources Research    2024, 0 (1): 88-94.   DOI: 10.13466/j.cnki.lczyyj.2024.01.012
    Abstract120)   HTML14)    PDF (3280KB)(88)       Save

    Calculating forest carbon storage is an important technology for China to achieve the goals of carbon dioxide peaking and carbon neutrality in the context of global warming.At present,conventional forest carbon storage accounting primarily adopts measuring standing trees in sample plots,which is less efficient and more costly in terms of labor.Meanwhile,there are problems such as the low accuracy of forest canopy data measurement.To address this issue,this study constructed a set of mathematical models based on the volume V of the canopy oblique photography model of Eucalyptus trees in Guangxi to predict their carbon storage T through experiments and data analysis.This was done using the oblique photogrammetry technology of unmanned aerial vehicles,as well as mathematical and statistical methods.Also,it takes reference to the relevant standards set by the forestry department and local authorities.It verified that experimental validation and regression analysis showed that the goodness-of-fit threshold R2 of this model reached 0.889 6,and the model can provide support for the investigation of eucalyptus forest carbon storagein Guangxi.At the same time,the methods and techniques in this study can also be appliedas a reference for constructing oblique photography carbon storage measurement models for other tree species.

    Table and Figures | Reference | Related Articles | Metrics
    Method and Application of Basic Price Evaluation Based on Forest Land Type
    LI Chenchen, WU Jianwei, SHI Tian
    Forest and Grassland Resources Research    2023, 0 (6): 61-66.   DOI: 10.13466/j.cnki.lczyyj.2023.06.007
    Abstract118)   HTML4)    PDF (1006KB)(158)       Save

    Evaluating the basic price of forest land,which provides reference prices for forest land circulation,is conducive to regulating the transaction of forest land use rights.Based on the forest land classification data of Wuzhishan City,we take the sample price as the dependent variable and the forest land classification index where the sample point is as the independent variable to establish regression model for different forest land types.Then we get the price of all classification units and the average price of each level is the basic price of forest land.The basic price of forest land in the study area corresponds to its level,showing a decreasing trend from level 1 to level 5.The basic price of arbor economic forest land where mango and lychee grows is the highest,followed by shrub economic forest land where tea grows.Bamboo forest land,short rotation timber forest land,general timber forest land,and general shrub forest land decrease sequentially.The basic price of economic forest land is much higher than timber forest land.The prices of the same type of forest land vary greatly due to different tree species.The basic price reflects the level of different quality forest land,which can provide reference for forest land circulation.The research results are beneficial for revitalizing forestry resources,promoting compensated use of forests,and providing support for protection and rational utilization of natural resource.

    Table and Figures | Reference | Related Articles | Metrics
    Diversity of Mammals and Birds in the Water Sources of An’nanba Wild Camel National Nature Reserve in Gansu Province
    WU Hao, MA Yongsheng, WANG Tianhui, Hezierhan , WANG Shengqi, XUE Yadong, LI Jia
    Forest and Grassland Resources Research    2024, 0 (1): 48-55.   DOI: 10.13466/j.cnki.lczyyj.2024.01.007
    Abstract117)   HTML13)    PDF (1535KB)(102)       Save

    This study aimed to determine the status of wildlife in An’nanba Wild Camel National Nature Reserve and provide substantial data for diversity conservation.From January 2020 to March 2023,we deployed camera trapping to investigate the diversity of wildlife at water sources in An’nanba,Gansu province,China.We obtained 3 303 photographs of single animals(out of 18 773 total detections)among 11 443 camera-trap days at seven water sources,and identified 17 mammal species(representing to 9 families and 4 orders),and 32 bird species(representing to 12 families and 7 orders).1)Among species,ten of them are listed as the first class in the key protected wild animals of national importance and eighteen are listed as the second class.Twenty-four wildlife species were evaluated as Near Threatened or above by the Red List of China’s Biodiversity.2)The Shannon-Wiener diversity index of the mammal and bird community is 2.67 and 3.03,respectively,and the Pielou evenness index of mammal and bird community is 0.65 and 0.62,respectively.3)Based on the relative abundance index(IRA),Gazella yarkandensis(99.54),Camelus ferus(53.57),Panthera uncia(35.22),Aegypius monachus(15.64),and Pseudois nayaur(13.81)were ranked as the top most abundant mammals and bird’s species.Our results provided a baseline of the wildlife resource in An’nanba Wild Camel National Nature Reserve,which is essential for biodiversity conservation and long-term monitoring in this area.

    Table and Figures | Reference | Related Articles | Metrics
    Research and Construction of Stand Form Height Model of Quercus glauca Secondary Forest
    WU Sha, BIAN Gengzhan, YI Xuan, LYU Yong
    Forest and Grassland Resources Research    2024, 0 (1): 134-142.   DOI: 10.13466/j.cnki.lczyyj.2024.01.017
    Abstract116)   HTML18)    PDF (1845KB)(95)       Save

    Exploring the construction and evaluation method of the stand form height model could provide a theoretical basis for the precise measurement of stand volume of Quercus glauca secondary forest in Hunan Province.Based on the measured data of 1055 individual trees from 35 plots,we established the univariate form height model and the binary form height model of Quercus glauca secondary forest in Lutou Forestry Farm and Qingyanhu Forestry Farm.The Quercus glauca tree height curve was derived from the Kunze,M.stem curve to calculate the stand condition mean height.Based on the univariate and binary correlations een form height,stand diameter at breast height and stand condition mean height,6 univariate basic models and 8 binary basic models were selected,and the coefficient of determination(R2),root mean square error(RMSE),explained variance(EA),mean absolute error(MAE)and model prediction accuracy(P1)were used as evaluation indicators.After evaluation and comparison,the univariate form height model was found to be f(D)=2.870 7×D0.261 8f(H)=2.022 4+0.339 5×H and the binary form height model was f(D,H)=0.590 6×exp(-0.008 3×D)Hf(D,H)=(0.710 2-0.070 1×logD)H and f(D,H)=2.479 9×(D2×H)0.109 2.The models were tested through cross Leave-One-Out Cross-Validation and Paired T-test.The results showed that both univariate and binary stand form high models had high accuracy and strong applicability.It verified that the method of constructing a stand form height model based on the stand mean diameter at breast height and the stand condition mean height is reasonable and feasible.It can also provide demonstration and reference for the construction of other types of stand form height models and the preparation of stand form height tables.

    Table and Figures | Reference | Related Articles | Metrics
    Biodiversity Conservation and Practice in National Wetland Park—A Case Study of Xixi National Wetland Park
    HU Xinting, YUAN Jun, CHENG Yonqquan, GUO Fengyi, YUAN Weiying, LI Gang, YANG Yongfeng
    Forest and Grassland Resources Research    2024, 0 (2): 133-140.   DOI: 10.13466/j.cnki.lczyyj.2024.02.016
    Abstract115)   HTML7)    PDF (1015KB)(128)       Save

    China established its first National Wetland Park in 2005.As an indispensable component of wetland protection system in China,national wetland parks have significantly contributed to biodiversity conservation over the past two decades.This study examines the significant challenges national wetland parks face in current biodiversity conservation and outlines key strategies for biodiversity conservation planning.Taking Xixi national wetland parks as a case study,it demonstrates specific practices in biodiversity conservation,particularly in rare and endangered species conservation,watershed biodiversity demonstration and nature education.This study proposes strategies for the key directions of biodiversity conservation in national wetland parks,which include protecting and restoring the biological baseline resources of wetlands,wild plant and animal habitat restoration,establishing information system for wetland sensing and monitoring,and promoting scientific and rational utilization of biological resources.These strategies aim to facilitate the development of national wetland park and enhance the quality of wetland biodiversity conservation in the new era.

    Table and Figures | Reference | Related Articles | Metrics
    Soil Moisture Characteristics and Its Response to Precipitation of Typical Plantation in Mu Us Sandy Land
    BAI Xingwen, BU Rigude, HONG Guangyu, LI Wei, SHAO Feizhou, ZHANG Lei
    Forest and Grassland Resources Research    2023, 0 (6): 52-60.   DOI: 10.13466/j.cnki.lczyyj.2023.06.006
    Abstract112)   HTML11)    PDF (3253KB)(85)       Save

    Fluctuations in precipitation patterns affects the ecological stability in arid and semi-arid areas Taking typical Hedysarum laeve plantations,Salix psammophila plantations and moving dunes in Mu Us Sandy land as research objects,through continuous monitoring of precipitation and soil profile water change,the soil moisture change characteristics at 10 cm,30 cm,50 cm,70 cm,90 cm and 110 cm of three kinds of land cover types and their responses to different precipitation magnitude were analyzed.The results showed that:1)The soil moisture content changed from shallow layer to deep layer,the sand dune showed an S-shaped change,the Hedysarum laeve plantation showed a 3-shaped change,and the Salix psammophila plantation showed a continuous increase.2)During the vegetation growing season from May to October,the soil moisture content of the sand dune showed fluctuation,the Hedysarum laeve plantation showed "M" type change,and the Salix psammophila plantation showed "N" type change.3)When precipitation was the same,the response of soil moisture recharge to precipitation was hysteretic,and the initial soil moisture content and precipitation intensity affected the depth of water infiltration.The results of this study provide a theoretical basis for rational utilization and prediction of water resources in the process of ecological construction in arid and semi-arid regions.

    Table and Figures | Reference | Related Articles | Metrics
    Research and Empirical Analysis of Farmers' Forest Land Transfer Behavior from the Perspective of Social Embeddedness
    WANG Wenqi, MEI Yuntian, CHEN Jiayu, ZOU Quancheng, SU Yang
    Forest and Grassland Resources Research    2023, 0 (6): 27-38.   DOI: 10.13466/j.cnki.lczyyj.2023.06.004
    Abstract112)   HTML5)    PDF (1061KB)(65)       Save

    The circulation behavior of farmers' forest land is a decision-making process that integrates economic,cultural,social and other factors,and is an interaction and integration of economic motives and non-economic motives,which is an economic-social behavior.Based on the perspective of social embedding,this paper empirically analyzed the survey data of 1544 sample farmers in 10 provinces,30 counties in China through the multivariate logistic regression model.The resault showed that,circulation behavior of farmers' forest land was not only affected by the independent factors of farmers,but also deeply affected by social cognition,social culture,social network,political system and other social embedded factors,and the circulation behavior of farmers' forest land was a typical social and economic activity.Seven indicators,including forestry management experience,forestry policy cognition,market information cognition,herd imitation behavior,network relationship strength,network relationship communication frequency and government service awareness had significant positive directions for farmers' forest land inflow and outflow behavior,which basically met expectations.The issuance of forestry subsidies had a promoting effect on the inflow of forest land by farmers,the difficulty of applying for forest harvesting indicators had a promoting effect on the outflow behavior of forest land of farmers,and the plot of land love did not passed the significance test,and the significance results of these three indicators exceeded expectations,and to a certain extent,they also reflected the actual difficulties and problems in forestry production and operation.Finally,three policy suggestions were put forward,including regulating the order of forest rights circulation,strengthening forestry subsidy policies,and improving the stability of forestry policies,in order to further promote forest land circulation policies,achieve the optimal allocation of farmers,forest land,technology,capital and other elements,and promote the modernization and development of forestry.

    Table and Figures | Reference | Related Articles | Metrics