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土系是我国土壤系统分类的最基层分类单元;而尽快建立健全覆盖我国各区域的典型土系是我国土壤系统分类的一项急迫工作。重点介绍河南省的土系建立情况,在222个典型单个土体的野外调查和实验测定数据基础上,依据《中国土壤系统分类检索(第三版)》和《中国土壤系统分类土族和土系划分标准》,共划分了5个土纲,11个亚纲,22个土类和39个亚类,建立了187个土系,并以农业耕作区的21个典型土系为例,介绍了河南省土系建立情况。
Soil system is the most basic taxonomic unit of soil system classification in China. Establishing and perfecting the typical soil system as soon as possible in various regions of China is an urgent task for the classification of soil system in China. Based on the field investigation and experimental determination data of 222 typical single soils, the author mainly focused on the establishment of soil series in Henan Province. Based on the data of “Classification of Soil Systems of China (Third Edition)” and “Soil Taxonomy of China Division standard ”, a total of 5 soil classes, 11 sub-classes, 22 soil types and 39 sub-classes were divided and 187 soil series were established. Taking 21 typical soil series in the agricultural cultivation area as an example, Soil Department of Henan Province to establish the situation.