中国土壤系统分类(二稿),已于1987年3月问世,其中有许多宝贵的信息和进展。根据1979年以来我们对中国变性土和变性的土壤(vertic soils)的广泛调查和研究,谨对二稿中有关变性土的诊断特征,亚纲、土类和亚类的划分标准和依据等提出了见解,可作进一步拟定变性土系统分类的参考,文中还强调了完善中国变性土系统分类有待研究的问题。 China soil system classification (2 draft), was published in March 1987, of which there are many valuable information and progress. Based on extensive surveys and studies of vertic soils in China since 1979, we put forward the criteria and basis for the division of diagnostic features, subclasses, soil types and subclasses in relation to transatlantic soils in the second draft The opinions can be used as a reference for further classification of denatured soil systems. The paper also emphasizes the issues to be studied in perfecting the classification of denaturing soil systems in China.