海南岛尖峰岭地区土壤类型及其数值分析

利用海南岛尖峰岭地区现有的64个土壤剖面分析资料,试用新拟中国土壤系统分类(二稿)标准,选择土壤腐殖质、pH、盐基饱和度、交换性铝及有效阳离子交换量等诊断特性,应用主组元和判别分析方法,将该地区的土壤区分为7个亚类4个土类,总的判别正确率达75.6％。为区域性土壤数量化系统分类的有益尝试,较之原有发生分类有所发展。

AN INVESTIGATION ON THE SOIL TYPES AND THEIR VALUE ANALYSIS IN JIANFENGLING REGION,HAINAN ISLAND

According to the Chinese Soil Taxonomy Classification (the second edition), based on the 64 soil profiles data collected in Jianfengliug region, Hainan Island, selecting 5 diagnostic characteristics (OM,pH,BS, Al, ECEC) of the soils, using the methods of both principal component analysis and discriminatory analysis, the soil types were classified into 7 subgroups as follows: humic yellow soil, surface-gley yellow soil(belonging to yellow soil great group); typical lateritic yellow soil(belonging to lateritic yellow soil great group); humic latosol, moist latosol and rich-base latosol(belonging to latosol great group) and dry red earth great group. The total accuracy of discrimination is more than 75.6 %. The equations were established through the principal component analysis. They defined the eigenvalues, delimitation index and the figure of the principal component scattering points with discriminatory boundaries of soil classification. The variation of the types both in the boundaries of soil classification and the characteristics of the soils are of significant difference.