Dynamics Of Forest Resource Renewal Pattern In Nanning Arboretum,Guangxi

Guangxi Nanning Arboretum in the Guangxi Zhuang Autonomous Region in recent years at the county level forest management planning changes to one of the nine pilot units,to explore the three changes of forest resources in river forest dynamics,improve Guangxi three river forest quality,improving ecological environment and promoting sustainable forest management and development,contribute to economic benefits,has important theoretical and practical significance of the maximum social benefit and ecological benefits.This paper surveys the present situation of the three river plantation resource management,to analyze the present situation of the management,including the theoretical basis of the forest resources in general,the problems facing the problems and causes of forest resource opportunities,countermeasures and suggestions for the management of forest resources.(1)Sanmenjiang forest farm through the forest resource management and planning,forest resources year by year high speed increase,forest ecological service function significantly enhanced,lies in the fact that from 2009 to 2017 forest coverage rate(collective forest zone)by 70.21%increased to 84.66%,increased 14.45%;2017 of fast-growing Eucalyptus area accounted for 72.59%of the forest land of the total operating area,the forest farm of main planting tree species and the proportion of young forest and trees with a total area of year by year is still a rapid increase of changes,Chinese fir,pine and other species indigenous to the area with the increase of Eucalyptus trees decreased.(2)By means of principal component analysis and selection of the 10 factors will influence the changes of forest resources in 10 driving force factors in per capita output and forestry science and technology level of the two main components of forest resources changes both to choose the 10 driving force of representative of 96.599%,per capita output and Forestry Science and technology level of the two principal components of the driving factors of the component matrix and fitting that forest resources model driven force index is:F =0.803F10.196F2.through the analysis of the driving force index and forest resources mainly four index timber forest area,forest area,forest and the forest coverage rate of correlation.(3)Reform of low yield forest,development of fast-growing and high-yield plantation,reasonable planning land area,forest resources change from extensive management to intensive management changes,in order to achieve the Sanmen river forest resources sustainable development policy.Under the premise of the rational allocation of low production and low efficiency forest to improve operations.