浙江省海岛土壤发生特征及其分类

The genetic properties and classification of soll in islets of Zhejiang province

浙江省海岛尽管处在亚热带红壤基带内 ,但由于海洋环境对海岛的独特影响 ,使海岛土壤成土作用出现与同纬度的大陆红壤有明显的差异性 :即表现出具有盐基饱和度高、pH值较高、盐基离子以钙、镁离子为优势的组合、粘粒矿物以伊利石为主、风化淋溶系数较大等特征 .因此 ,应根据这些差异性 ,给予海岛土壤以合理的土壤类型 .

The comparative study of the genetic properties of soil in islets of Zhejiang provence was made.The result s showed that,the islets soil and red earth of Zhejiang were distinct, the main clay minerals were illies,higher base saturation and pH,the main base ion were Ca+{2+} and Mg+{2+},higher ba value, Bt value 0.7～1.2 ect..Owing to more aridity aridity bioclimatic condition in islets regions than in continent of Zhejiang, differences in their developing intensity,soil properties are similar to tha t of arid subtropical region.According to the Chinese Soil Taxonomic Classificat ion islet soil must be belong to dry red soil of vstic ferrisoil.