我国砂姜黑土土种的系统分类归属研究

本文根据我国第二次土壤普查资料,依据《中国土壤系统分类检索》(第三版)中变性土诊断标准,对我国砂姜黑土主要分布区(安徽、河南、江苏和山东)的砂姜黑土所有土种进行了系统分类归属判别。结果表明:总共的54个土种中(安徽、河南、江苏和山东各13、20、6和15个),34个可以划归为变性土(安徽、河南、江苏和山东各7、16、5和6个),合计面积228万hm2(安徽、河南、江苏和山东各131万、59万、24万和14万hm2);26个砂姜黑土土种可划归为砂姜钙积潮湿变性亚类,8个为钙积潮湿变性土,其余属于雏形土或盐成土。对砂姜黑土的系统分类应该主要依据其黑土层的特性,而砂姜的存在与否只是决定亚类的特征。

On taxonomy of Shajiang black soils in China

Based on the information from the 2nd national soil survey and the diagnostic criteria of Vertosols in Chinese Soil Taxonomy,this paper discusses the taxonomic classification of the soil-species of Shajiang black soils in its main distribution regions in China,i.e.,Anhui,Henan,Jiangsu and Shandong provinces.The preliminary results showed that among the total 54 soil-species of Shajiang black soils,34 soil species,with an area of 228?104 hm2,could be classified as Vertosols,among of which,26 as Shajiang Calci-Aquic Vertosols and 8 as Typical Calci-Aquic Vertosols respectively,the other soil-species of Shajiang black soils could be categorized as Shajiang-Aquic Cambosols or Aqui-Alkalic Halosols.The diagnosis of these kinds of soils should focus more on the black clay layer rather than the carbonate concrete layer which determines only the lower categories.