中文摘要：

为弄清北方古红土在中国土壤系统分类中的位置,对辽宁朝阳地区分布的第四纪古红土的特性和系统分类进行了研究。本文首先将古红土看做成土母质,按《中国土壤系统分类检索（第三版）》的原则和方法,讨论了供试古红土剖面的诊断层和诊断特性,并进行了分类检索;又从古红土本身的发生学特征出发,讨论了各古红土剖面的诊断层和诊断特性,并进行了分类检索。研究发现：现行的《中国土壤系统分类检索（第三版）》还不能给古红土一个合适的位置,要解决古红土在中国土壤系统分类中的位置问题,首要任务是建立关于古土壤的诊断标准。

英文摘要：

In order to understand where North China paleo-latosol-like soils should be placed in Chinese Soil Taxonomy,study was carried out on soil properties and taxonomy of the Quaternary paleo-latosol-like soils in Chaoyang area of Liaoning Province.The soils were classified based on diagnostic horizons and diagnostic characteristics of the soils analyzed either by following the principle and methodology of the ＂Keys to the Chinese Soil Taxonomy（3rd edition）＂ with the soils deemed as parent material,or by proceeding from the soil genetic characteristics of the soils.Results show that the current version of the Keys to Chinese Soil Taxonomy（3rd edition） is unable to provide the paleo-latosol-like soils,a niche in the system.To solve the problem,the foremost task is to establish criteria for diagnosis of paleosols.