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Forestry Development in Central and Eastern European Countries and Analysis on Future 16+1 Forestry Cooperation WANG Yanqin, CHEN Jie, GU Yali FOREST RESOURCES WANAGEMENT    2017, 0 (1): 153-159.   DOI: 10.13466/j.cnki.lyzygl.2017.01.024 Abstract （248）   HTML （3）    PDF （1343KB）（1822）       Knowledge map    Save As the Belt and Road Initiative and 16+1 Cooperation mechanism have been established and implemented,the central and eastern European countries,which are located along the Belt and Road,are the key area for the forestry cooperation with China.These countries boast rich forest resources,strong sci-tech strength and good foundation for industrial development,which was laid a solid foundation for the forestry cooperation with China.The paper analyzed the forest resources,forestry laws and regulation & policies,forestry governance regime,forest product production and trade,concluded that the central and eastern European countries are rich in forest resources,have improved forest governance mechanism in place,and own the good foundation for forest product industry.Based on this,the authors explored the potentials for China and the central and eastern European countries to carry out forestry cooperation as well as the possible risks to be encountered.This study is expected to provide references and supports for the future 16+1 forestry cooperation. Table and Figures | Reference | Related Articles | Metrics

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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 Abstract （411）      PDF （3140KB）（2089）       Knowledge map    Save In this study,we introduced the contents of forest-land “one map” for the county,provincial and national levels,and studied the key technologies of forest-land “one map” information extraction,data check and the integration of database.Based on the WebService,we designed and developed a data management and service platform of national forest-land “one map”,and operated it online.lastly,the data application for forest-land “one map” was discussed. Reference | Related Articles | Metrics

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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 Abstract （2045）   HTML （185）    PDF （1091KB）（933）       Knowledge map    Save The Sixth National Survey on Desertification and Sandification was based on the results of the Third National Land Survey,using 2019 as the benchmark year.The results showed a comprehensive status of desertification and sandification in China.This paper presented a brief overview of this survey,the status and dynamic changes of desertification and sandification in China,conducted a comprehensive analysis of the current situation,and proposed some suggestions for combating desertification and sandification.The survey results showed that,until 2019,the desertification land area in China was 257.371 3 million hm2 and the sandification land area was 168.782 3 million hm2.Compared with 2014,the desertification area of China decreased by 3.788 0 million hm2 with an average annual decrease of 757.6 thousand hm2.The sandification area of China decreased by 3.335 2 million hm2 with an average annual net reduction of 667 thousand hm2. Table and Figures | Reference | Related Articles | Metrics

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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 Abstract （276）   HTML （7）    PDF （1271KB）（849）       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

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Research on the Planning of Amur Tiger and Amur Leopard National Park LIANG Bingkuan, LIU Yang, TANG Xiaoping, BAN Yong, JIANG Yafang, KONG Ying, LI Bingbing, BAI Ling FOREST RESOURCES WANAGEMENT    2020, 0 (6): 23-30.   DOI: 10.13466/j.cnki.lyzygl.2020.06.005 Abstract （1346）   HTML （51）    PDF （1976KB）（1097）       Knowledge map    Save The establishment of Amur Tiger and Amur Leopard National Park is a major measure to protect the rare and endangered species,such as Amur tiger and Amur leopard,and their habitats.It is of global significance to protect the ecological security barrier as well.The national park is facing a key window period for the restoration of populations of Amur tiger and Amur leopard,also the reform period of the national forest area and the historical transformation period of the natural protected area system.The situation is complicated and changeable.The planning,at first,puts forward the philosophy of construction and development of adhering to natural priority,national interest,community benefit and common people sharing.Secondly,the planning clarifies,in the initial stage,the main management objective is to make the populations of Amur Tiger and Amur Leopard stabilized and reproduced,to restore and maintain the integrity of the forest ecosystem,and to promote the formation of both production and living modes with eco-friendliness in a community.And then,the planning adopts methods such as system planning,adaptability planning and LAC framework model to propose the solutions for key issues of national park such as boundary and range,control zoning,management system,ecological restoration and community development. Table and Figures | Reference | Related Articles | Metrics

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Concession Management Analysis and Operation Model Selection of China's National Parks GENG Songtao, ZHANG Hongxia, YAN Rong FOREST RESOURCES WANAGEMENT    2021, 0 (5): 10-19.   DOI: 10.13466/j.cnki.lyzygl.2021.05.002 Abstract （869）   HTML （26）    PDF （1114KB）（938）       Knowledge map    Save National park is one of the core tasks of China's protected area system construction.In order to achieve the win-win goal of national park ecological protection and resource appreciation,franchising is a good method that can be used in its operation and management.According to the classification,the national park franchise in our country belongs to the government concession.In order to regulate the concession management,this article used a comparative analysis method to analyze the O&M model (Operation and Maintenance Contract),the LOT model (Lease-Operate-Transfer),and BOT (Build-Operate-Transfer)mode and TOT (Transfer-Operate-Transfer)concession model are compared and analyzed,and it was concluded that the TOT model is currently the better choice for national park concession in China,and other models can also be used in conjunction with local conditions.In addition,in view of the existing problems in legal regulation,operation management,fund revenue and expenditure,and supervision of current characteristics of operation,four special measures such as improving the legal system,standardizing operation procedures,formulating revenue and expenditure standards,and improving the supervision mechanism were proposed to effectively contribute to China's ecological civilization.This article studied and explored the future development path of concession in national park management,so as to provide reference and inspiration for promoting the development of national parks. Table and Figures | Reference | Related Articles | Metrics

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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 Abstract （326）   HTML （7）    PDF （4757KB）（738）       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

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Study on the Promotion Role of REDD+ Mechanism to Sustainable Forestry Development in China—Based on the Case Analysis of Forestry Carbon Development in Beijing HE Guimei, ZHANG Feng, YU Haiqun, CHEN Junqi, ZHOU Caixian FOREST RESOURCES WANAGEMENT    2014, 0 (5): 18-22.   DOI: 10.13466/j.cnki.lyzygl.2014.05.004 Abstract （288）      PDF （1097KB）（901）       Knowledge map    Save REDD + mechanism is an effective tool to reduce the greenhouse gas emissions for global forestry,recently REDD+ projects have been extensively planned and implemented in Brazil and other tropical regions.The successful promotion of REDD+ mechanism is able to exert great impacts on the forestry development strategy,policy,technology,management and interest allocation worldwide.The development of forestry carbon in Beijing is used as a typical case in this article to analyze and summarize the main actions of REDD+ mechanism development in China,in order to make feasible policy suggestions to promote the development of REDD+ in China. Reference | Related Articles | Metrics

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Practices and Exploration of Forest Ticket System Reform in Sanming of Fujian Province WANG Weibin, LI Shan FOREST RESOURCES WANAGEMENT    2021, 0 (4): 17-22.   DOI: 10.13466/j.cnki.lyzygl.2021.04.003 Abstract （683）   HTML （11）    PDF （1144KB）（771）       Knowledge map    Save The key approaches to turn lucid waters and lush mountains into invaluable assets are to focus on core problems such as difficulty in discovering the value of forestry basic assets,low pricing efficiency,and poor liquidity,through the establishment and improvement of market-oriented forest resource value discovery mechanisms,product pricing mechanisms,and circulation trading mechanisms to gradually promote the capitalization of ecological resources,the securitization of ecological assets,and the marketization of ecological securities trading.Since the 19th National Congress of the Communist Party of China,Sanming has been implemented the spirit of General Secretary Xi Jinping's instructions on comprehensive deepening reform,especially the forestry reform in Fujian,explored the market-oriented mechanism for value discovery and realization of ecological products based on the reform concept of "lucid waters and lush mountains are invaluable assets" and continued to deepen the fourth round of forest reform with forest ticket system innovation as a breakthrough.Taking Sanming as an example,this paper summarized the pilot situation and main experience of the current forest ticket system reform,analyzed the current problems and expected benefits in the exploration of the forest ticket system in Sanming,and provided opinions and implementation suggestions for continuing to deepen the reform of the forest ticket system. Table and Figures | Reference | Related Articles | Metrics

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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 Abstract （358）   HTML （2）    PDF （1037KB）（722）       Knowledge map    Save According to the investigation result of forest tree germplasm resources in Shandong province,there are 15 Chinese rare and endangered tree species naturally distributed there,which belongs to 12 families,13 genera,and the characteristics of their natural distribution are summarized.Suggestions of protection are put forward for carrying out related research in the future. Table and Figures | Reference | Related Articles | Metrics

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Population Size Structure and Life Table Analysis of Nyssa sinensis in Sanming City,Fujian Province HUANG Yunpeng, SU Songjin, FAN Fanrong, WANG Bangfu, HUANG Sumei, CHEN Shaohuang FOREST RESOURCES WANAGEMENT    2015, 0 (3): 85-88.   DOI: 10.13466/j.cnki.lyzygl.2015.03.017 Abstract （244）      PDF （1190KB）（858）       Knowledge map    Save To comprehensively understand the variation of Nyssa sinensis population in Sanming City,the space time method and smoothing technique were used in life table analysis.Results showed that diameter at breast height (DBH)structure of N.sinensis population is at temporal stability.The peak of mortality rate and vanishing rate both appeared at the age of 3-4 and 8 years,respectively.The survival curve can be described by Deevey-Ⅱtype.Four function curve of survival exhibited that N.sinensis population decreased at young stage and grew stably at mature stage and old stage.The results can provide a scientific basis for the management of N.sinensis population. Reference | Related Articles | Metrics

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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 （493）   HTML （11）    PDF （8599KB）（573）       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

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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 Abstract （238）   HTML （14）    PDF （972KB）（537）       Knowledge map    Save The fourth rocky desertification survey in Karst area was based on the result of the third national land survey,while taking 2021 as the base year to comprehensively investigate the condition and change of the rocky desertification land China.This paper briefly introduced the basic situation of the fourth rocky desertification survey,the present situation and dynamic change of rocky desertification land,as well as analyzed the current situation of rocky desertification control,and put forward countermeasures and suggestions.The results showed that,the rocky desertification land area was 7.223 million hm2 by 2021.Compared with 2016,the net decrease of rocky desertification land area was 3.331 million hm2,while the average annual decrease was 0.666 million hm2.The main results indicating that the rocky desertification land in China presents the overall evolution direction of "area decreasing,degree reduction and ecological condition being stable ". Table and Figures | Reference | Related Articles | Metrics

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Analysis of Landscape Patterns of National Wetland Parks—A case study of Egret Wetland Park in Chengdu GAO Linan FOREST RESOURCES WANAGEMENT    2017, 0 (5): 108-113.   DOI: 10.13466/j.cnki.lyzygl.2017.05.018 Abstract （537）   HTML （16）    PDF （1048KB）（610）       Knowledge map    Save Based on some data of Egret Wetland Park and principles of landscape ecology,ArcGIS software and Amap photo pictures had been used,meanwhile the spots had been investigated. The characteristic index of patches,the landscape diversity index had been selected to analyze the spatial pattern of Egret Wetland Park area. The total area of Egret Wetland Park area was 200.04 hm2,the grassland and lake were the main landscapes in Egret Wetland Park,which accounted for 123.52 hm2 and 26.31 hm2,PLAND were 61.75% and 13.15%. From the results of patch density(PD)and number of patches(NP),the degrees of fragmentation of different sights were similar,it showed that the degree of fragmentation of road(NP=85 n,PD=42.49 n/100hm2)and grassland(NP=48 n,PD=24.00 n/100hm2)were higher. In addition,the calculation results of mean shape index(MSI)and mean patch fractal dimension(MPFD)indicated that the river(MPFD=1.43,MSI=12.21)was the most complicated in patch shape,while shrub(MPFD=1.07,MSI=1.50)was simplest. The Shannon’s diversity index was 1.31,the Shannon’s evenness index was 0.63,which indicated that the landscape diversity was high,the dominant patch was obvious,the distribution of patches was not uniform. Table and Figures | Reference | Related Articles | Metrics

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Comparison and Analysis on Two Kinds of Sample Plot Survey Methods of Systematic Sampling in the Forest Inventory for Planning and Design XU Zhengliang, WANG Yingquan, LU Yongfei, YANG Jie FOREST RESOURCES WANAGEMENT    2016, 0 (3): 140-144.   DOI: 10.13466/j.cnki.lyzygl.2016.03.025 Abstract （377）      PDF （974KB）（695）       Knowledge map    Save This paper took systematic sampling as an example in the fourth forest inventory for planning and design in Jinping County of Guizhou Province,and the point sampling with angle gauge & volume standard table and circle-shaped sample tally & two-way tree volume table were compared and analyzed.The results showed that the precisions of the volume estimates from the point sampling with angle gauge and circle-shaped sample tally were respectively 90.28%and 90.38%,exceeding 90% which is the precision standard of the technical specification for the forest inventory in Guizhou.The difference of total forest stand volume between two forest inventories was only 1.63%;The sample tree of the point sampling with angle gauge was less,but more efficient than the circle-shaped sample tally in sampling,and the load of field work of the former was about 40% of the latter;the number of trees per hectare,cross-sectional area at breast height of per hectare and hectare volume were lower than the circle-shaped sample tally in the precisions of estimates.Subcompartment volume cruise with angle gauge & volume standard table,systematic sampling with circle-shaped sample tally & two-way tree volume table are applicable in the sampling control of total volume. Reference | Related Articles | Metrics

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Comparison of Vegetation Classification Methods Based on High Resolution Remote Sensing Image ZHANG Diandai, WANG Xuemei FOREST RESOURCES WANAGEMENT    2021, 0 (3): 108-113.   DOI: 10.13466/j.cnki.lyzygl.2021.03.017 Abstract （445）   HTML （9）    PDF （2282KB）（640）       Knowledge map    Save Taking the oasis-desert transition zone in the eastern part of Kuqa City,Xinjiang as the research object and using GF2 remote sensing image as the main data source,on the basis of field investigation,supervised classification based on pixel and object oriented classification based on hierarchical multi-scale segmentation were used to accurately identify the vegetation information in the study area.The results showed that:1) The results of supervised classification and object-oriented classification were roughly the same.The overall classification accuracy rates of both methods could reach more than 94%,and the Kappa coefficient was greater than 0.93,both of which reflect higher classification accuracy.2)Compared with supervised classification,the object-oriented classification method improved the overall classification accuracy by 3.79%,and the Kappa coefficient increased by 0.032,which had a better classification effect and classification accuracy.By determining the optimal scale segmentation,the object-oriented classification method can more accurately extract vegetation information in the study area,and provide a scientific basis for the reasonable evaluation of the regional land desertification status. Table and Figures | Reference | Related Articles | Metrics

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

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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 Abstract （125）   HTML （7）    PDF （2297KB）（439）       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

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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 Abstract （286）   HTML （19）    PDF （1228KB）（436）       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

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Water Loss Characteristics of Excised-leaves of 15 Evergreen Woody Plants in Kunming,Yunnan Province LI Shiyou, LUO Jing, ZHANG Qiaorong, JIANG Ting, WANG Kunlun, Wang Qiuhua, HU Yane FOREST RESOURCES WANAGEMENT    2019, 0 (2): 142-146.   DOI: 10.13466/j.cnki.lyzygl.2019.02.021 Abstract （435）   HTML （3）    PDF （1044KB）（613）       Knowledge map    Save Based on the phenomenon that the broad-leaved forest was as flammable as Pinus.yunnaneneis forest,P.armandii forest,P.yunnanensis var. pygmaea forest under certain conditions,the excised-leaves of 15 evergreen woody plants collected from Ternstroemia gymnanther,Illicium simonsii,Camellia pitardii,Cinnamomum glanduliferum,Rhododendron siderophyllum,Castanopsis orthacantha,Lithocarpus mairei,Cyclobalanopsis glaucoides,Rhododendron spinuliferum,Myrica nana,R.decorum,Michelia yunnanensis,P.yunnaneneis,P.armandii,P.yunnanensis var. pygmaea respectively were sampled to study the water loss characteristics in Kunming,Yunnan province.The mass of each fresh samples and its mass heated in 0.5h,1h,1.5h,2h,3h,4h,5h,17h at 80 ℃ were weighed.The water loss characteristics of 15 samples were analyzed according to the water loss rate of each sample in each period,the water loss rate of each sample in each second and absolute moisture content of each sample in each period.The results showed that the water loss rate of 15 samples was fast firstly then turned to be slow and coniferous leaf samples hold water better than broad-leaved samples.From the perspective of water loss,3 kinds of coniferous leaves were slower than 12 kinds of broad leaves and the flame retardancy was opposite.The water loss rate of excised-leaves under the action of heat can be used as an indicator to evaluate the plants combustibility. Table and Figures | Reference | Related Articles | Metrics