对成都平原地区广泛分布的水耕人为土中，就同一亚类的几种典型土系，对其诊断层的土壤微形态特征进行研究，提出了划分不同土系及其所属土壤的土壤属性如：土壤颗粒、土壤矿物、土壤结构、土壤形成物等的特征的微形态证据。研究表明：土壤诊断层的微形态特征能够综合地、直观地、准确地反映土壤这些分类属性，同时还能提供土壤生产性方面的信息。所以本研究结果在土壤系统分类的基层分类以及应用于生产上，都有重要的理论和实践意义。

Several representative soil series, attributing to same soil subgroup, were selected out in Stagnic Anthrosols distributing extensively in Chengdu Plain. Soil micromorphological features of diagnostic horizons of soil series were studied, and soil properties in micromorphology were pointed out to identify soil series and the soil family to which the soil series belong, e.e. soil particles, soil minerals, soil structure, and soil formations, etc. The results showed that soil micromorphological features of the diagnostic horizons could comprehensively, distinctively, and exactly reveal the soil properties for taxonomic classification and provide the information of soil productivity. Consequently, lower categorical classification within soil taxonomic classification and its application into practice were important theoretically and technically.