选取湘北地区7个发育于2种母质的水稻土剖面样点，通过对其成土环境、剖面形态特征以及土壤理化性质进行野外观测和室内分析，按中国土壤系统分类方案，检索出诊断层和诊断特性，确定其在中国土壤系统分类中的归属，并评述土系的生产性能。结果表明：供试水稻土归属于水耕人为土亚纲下的简育和铁聚水耕人为土2个土类，底潜简育水耕人为土、普通简育水耕人为土、普通铁聚水耕人为土、漂白铁聚水耕人为土4个亚类；进一步按照土族和土系划分标准，划分出7个土族和7个土系。在相同成土环境下，同种母质发育的水耕人为土，土壤系统分类比土壤发生分类具有更强的划分能力。其划分的基层土壤单元(土族和土系)，对农业生产、土地资源利用更具有指导意义。

Seven typical paddy soil profiles derived from two parent materials were selected in Northern Hunan Province, soil form environment, profile morphological characteristics and physicochemical properties were observed and analyzed, the diagnostic horizons, diagnostic characteristics and attribution of these soil profiles were identified according to Chinese Soil Taxonomy. The results showed that those paddy soils belonged to two groups of Hapli-Stagnic Anthrosols and Fe-accumuli- Stagnic Anthrosols, and four subgroups of Endogleyic Hapli-Stagnic Anthrosols, Typic Hapli-Stagnic Anthrosols, Typic Fe- accumuli-Stagnic Anthrosols and Albic Fe-accumuli-Stagnic Anthrosols. According to the classification standards for Chinese soil family and soil series, seven soil families were identified and seven soil series were established for those paddy soils. Compared with Soil Genetic Classification, Soil Taxonomy can differentiate further paddy soils in the same form environment, and the established soil families and soil series are more quantitative and more conducive to agricultural production and land use.

S155.3

国家科技基础性工作专项课题项目(2014FY110200)资助。