Research on Climatic Regionalization for Phyllostachys edulis in Hubei Province

Principal Component Analysis(PCA) was applied to analyze the correlations among the growth and distribution of Phyllostachys edulis and 16 climatic factors in 76 counties or municipalities of Hubei Province.The results are as follows: The accumulated contribution rate of the leading four principal components reached 83.25%.The scoring equation of each sample,i.e., each of the 76 counties or municipalities was built by taking eight factors including annual precipitation,annually accumulated effective temperature,yearly evaporation,the average temperature in July,the rainfall between April and October,the yearly average temperature,the mean temperature in January and latitude as the leading factors.Five zones were classified by clustering analysis method with R type shortest distance for P.edulis cultivation according to the clustering characteristics of the scattered points,the national standards of horizontal regionalization for P.edulis,integrated with the consistency between the growth,distribution situation of P.edulis and jurisdiction division in Hubei province.The five zones were the optimum areaⅠ;the suitable area II;comparatively suitable area Ⅲ,sporadic distribution area IV,and the alpine introduction area V.