The Evaluation Of Forest Ecological Quality In Liling Of Hunan Province

Liling City is known as "the hometown of Chinese tea and tea","Chinese ceramic historical and cultural city","Chinese fireworks" and other famous,is the east gate of Hunan,and it has a long history,rich in resources and many historical sites.The forest ecological quality evaluation of Liling forest,which is conducive to accurately grasp the status quo of forest ecological quality in Liling City and protect the ecological environment of Liling City.It is also conducive to the forestry sector to formulate scientific and reasonable forest resources management and management measures to effectively cope with the changes of existing resources and environment for the sustainable development of Liling City's social and economic environment Contribute to development.In this study,Liling City,Hunan Province,as the research object,combined with the data of the second class survey of Liling City in 2014 and the related research results of previous people,using Arcgis,Fragstats,Matlab and other software,from forest health,forest ecological service function value and forest Landscape stability of the three aspects of the Liling City forest analysis,the ecological quality of Liling City were evaluated,the conclusions are as follows:(1)According to the principles of system and operability,this study selected three criteria layers of forest health,forest ecological service function and forest landscape stability to construction of the evaluation system of forest ecological quality in Liling city.The system includes 11 first-level indicators such as functional stability,system vitality,water conservation,conservation soil,topographic sensitivity,landscape adaptability,and includes 30 secondary indicators such as traffic location,origin,forest disaster level,annual water regulation value,annual purification water quality value,annual solid soil value,elevation,landscape type fragmentation index,dominance index.The principal component analysis method was used to determine the weight of each part,and the forest ecological service function>forest landscape stability>forest health was obtained.(2)Forest health index analysis:the health level of arbor forest area according to the order of the order:health>less healthy>general health>unhealthy>very healthy,the area of tree health by the order of order:Dongxiang area>Nanxiang area>Xixiang area>City>Beixiang area.The health of the shrubs was the same as the size of the order:unhealthy>health>less healthy>general health>very healthy,the shrub health of the region by the order of the order:Xixiang area>urban>Nanxiang area>Dongxiang area>North Township area.(3)The value of forest ecological service function analysis:the value of forest ecological service function in each item of Liling City is ranked according to the order of size:forest conservation water value>forest conservation biodiversity value>forest carbon fixation value>forest purification atmospheric environmental value>Forest forest conservation soil value>forest accumulation nutrient value;the total value of forest ecological service function in each region is in order of size:North Township>South Township>Xixiang>Dongxiang>urban area;different forest types per unit area forest ecological service function The results were in the order of broad-leaved forest:shrub forest>cunninghamia lanceolata>foreign pine forest>Pinus massoniana forest>Cunninghamia lanceolata forest>Cedar forest>Bamboo forest>Economic forest.The total value of forest ecological function service:Forest forest>broad-leaved forest>Cunninghamia lanceolata>Pinus massoniana>Pine forest>Bamboo forest>Shrub forest>Cunninghamia lanceolata forest>Cedar forest;Forest area with different forest ecological service function ranks in order of size:Service value is higher>Service Low value>high service value>service value in general.(4)The stability of forest landscape was analyzed.The order of tree area stability was as follows:general stability>less stable>stable>unstable.The stability of tree area was ranked as follows:Xixiang>Nanxiang>Beixiang>City>Dongxiang;the stability of the landscape shrub area in the order of size:the general stability>less stable>stable>unstable>very stable,the stability of tree landscape in each region is in order:Xixiang>South Township>City>Dongxiang>North Township.(5)The ecological quality of forest in Liling City is generally better,and the number of patches of ecological quality in each grade is in the order of:Good>General>Better>Excellent>Poor,the highest number of forest patches at a good level,close to the total;The number of forest patches in general,preferably two levels is close to half of the total;the number of forest patches at an excellent level exceeds one-sixth of the total;the number of forest patches at poor levels is less than the fifth.(6)Analysis of forest ecological quality of different tree species group:the ecological quality status of Chinese fir was ranked in the order of size:general>better>poor>good>excellent;the ecological quality status of Pinus massoniana was ranked in the order of size:better>general>good>poor>excellent;the ecological quality state of the broad-leaved trees is in the order of size:better>good>excellent>general>poor;the quality of the ecological quality of the area ranked by the order of the order:general>better>good>poor>excellent;the rank of the ecological quality of shrubs is in the order of size:general>better>poor>good>excellent.