广西砖红壤在土壤系统分类中的归属研究

根据广西滨海地带6个砖红壤剖面的形态特征和理化性质，对照《中国土壤系统分类检索》，逐一确定各剖面的诊断层和诊断特性及其在土壤系统分类中的归属，并探讨该地区土壤发生分类砖红壤与土壤系统分类之间土壤类型的对应关系。结果表明，供试土壤剖面因成土因素差异而具有不同的诊断层和诊断特性，可分别归属于土壤系统分类中的铁铝土、富铁土及新成土3个土纲、4个土类。鉴于广西土壤发生分类6个砖红壤剖面并非全部归属于系统分类中的某一土纲或土类，实际工作中应根据土壤剖面的形态描述和理化性质，鉴别出其具有的诊断层和诊断特性，并通过检索系统依次检索、分类定名。

Affiliation of latosols from Guangxi in Chinese soil genetic classification and Chinese soil taxonomy

The morphological characteristics and physico-chemical properties of six latosol soil profiles collected from coastal areas of Guangxi were studied and the characteristics of horizons of soil profiles as well as their related taxonomic category were defined on the basis of Chinese Soil Taxonomy （3~ edition）. The relation of taxa between Chinese Soil Genetic Classification and Chinese Soil Taxonomy were also discussed. The results showed that there were different diagnostic horizons in the soil profiles because of the different soil-forming factors. Six soil profiles were affiliated to three orders including ferralosols, ferrosols and primosols and four groups of the Chinese soil taxonomy. Since the six latosol profiles collected from Guangxi were not entirely affiliated to some order group of the Chinese Soil Taxonomy, the diagnostic horizons and diagnostic characteristics of soil profiles should be identified and classified according to the morphological characteristics and physico-chemical properties and was named by retrieval system in practice.