皖南紫红色砂石岩上发育土壤的系统分类研究

对皖南不同时期紫红色砂石岩上发育的8个土壤剖面,按中国土壤系统分类体系,进行鉴别、检索、分类定名。阐述发生分类紫色土的2个亚类级土壤类型在中国土壤系统分类中归为3个土纲,即均腐土、雏形土和新成土;3个亚纲,即湿润均腐土、湿润雏形土和正常新成土;4个土类和6个亚类。提出按中国土壤系统分类的紫色土分类系统;并与美国土壤系统分类、国际土壤分类参比基础进行了参比。讨论了皖南紫红色砂石岩上发育为均腐土的成土环境条件,同时对发生分类紫色土在中国土壤系统分类类别检索提出修订建议。

TAXONOMIC CLASSIFICATION OF SOILS DERIVED FROM PURPLE-RED SAND ROCKS IN SOUTH ANHUI PROVINCE

Eight soil profiles in soils derived from purple-red sand rocks at different time periods in south Anhui Province were identified and classified according to the keys to the Chinese Soil Taxonomy(CST)(the 3rd edition).The placement of 2 taxa,the eight soil profiles were formerly sorted into on the subgroup level in the Chinese Soil Genetic Classification(CSGC),in CST was elucidated in the paper.All these soils studied are classifed into 3 CST Orders: Isohumosols,Cambosols and Primosols,3 CST Suborders: Udic Isohumosols,Udic Cambosols and Orthic Primosols,4 CST Group and 6 CST Subgroups.With CSGC-Purple-Soil as object for classification,references between the CST,the U.S.Soil Taxonomy(ST) and the World Reference Base for Soil Resources(WRB) were discussed.Environmental conditions for development of Isohumosols from purple-red sand rocks in south Anhui Province were also studied.Meanwhile some amendments were suggested of the Keys to the CST in classifying CSGC-Purple-Soils.