Site Classification and Evaluation of Teak Forests in Hainan Island

According to the investigation data of 32 plots,the site classification and evaluation of teak forests in Hainan Island were studied.The site index is used as a criterion variable and the 6 ecological factors are used as explanatory variable in which the soil fertility is one of the 6 ecological factors,which are determined by the 6 soil chemical characteristics.Through the mathematical analysis methods of the theory of quantification I,principal component analysis and coordinate comprehensive judgment,the 4 site type groups and site types are classified and evaluated.