Site Evaluation of Chinese Fir and Its Application in Hengyang Area

Study and research on the site quality evaluation of three different geomor-phologie areas:mountainous are ,isolated area and hilly area,in Henyang of Hunan Provincewere condueted,totally 362 plots,362 dominant trees and sample trees for stem analysis.Screening through multivariate statistical analysis the guiding factors are: middle geomor-phy,form of slope,orientation of slope,open degree and thickness of soil humus and soil layerwhich impact the growth of Chinese fir.According to mid-eomorphy three different sitetype regions are divided,according to the position of slope three site type groups are differen-tinted as well as according to the form of slope and soil site types are determined.Site indext table is also produced to predict site productivity.Site quality productivity of overlap moun-tainous area is the highest,among which 35%of the area is covered by 14 and above 14 siteindex region,while isolated and hilly region only take up 3%~15%.Chinesefir should be lo-eally but not widely developed in hilly and isolated region.