发生分类淋溶土与系统分类参比特征研究

CHARACTERISTICS OF REFERENCES BETWEEN GSCC AND CST FOR GSCC-LUVISOLS

利用最新建立的中国 1∶10 0万土壤数据库 ,研究了我国发生分类淋溶土与中国土壤系统分类的参比及其在中国土壤系统分类下的空间分布和数量特征。结果表明 ,我国发生分类淋溶土总面积为10 5 975 7.8km2 ,分布规律明显 ;与系统分类参比 ,发生分类淋溶土分属于中国土壤系统分类 4个土纲 ,即淋溶土、雏形土、新成土和灰土 ,它们分别占发生分类淋溶土总面积的 72 .8%、2 6 .1%、1.0 %、0 .1% ,其中包含系统分类的 2 5个土类和 4 7个亚类 ,参比关系复杂 ,不是简单的一对一的关系。分析发生分类某一类型土壤分属于系统分类不同类型的面积比例及其标准偏差 ,结果表明土壤参比的单元级别越低 ,越易于参比和把握。为了使中国土壤系统分类更实用、更易于普及 ,深入开展土壤基层分类研究 ,进一步发展和完善中国土壤系统分类是必要的 ,也是十分迫切的。研究结果对于土壤类型的正确参比、中国土壤系统分类的应用与发展 。

References between the Genetic Soil Classification of China (GSCC) and the Chinese Soil Taxonomy (CST) for GSCC-Luvisols were conducted and their quantitative and spatial distribution characteristics within CST were studied, based on 1∶1M Soil Database of China, which consists of 3 parts, 1∶1M digital soil map, soils profiles attribution database and soil reference system of China. GSCC-Luvisols are typical zonal soils with a total area of 1 059 757.8km 2, including 7 GSCC Groups, such as Dark Brown Soils (36.0%), Brown Soils (23.8%), Yellow Brown Soils (20.8%), Brown Coniferous Forest Soils (10.0%), Bleached Baijing Soils (4.3%), Yellow Cinnamon Soils (5.1%) and Bleached Podzolic Soils (0.01%), as well as 25 GSCC Subgroups. It can be sorted into 4 CST Orders, Argosols (72.8%), Cambosols (26.1%), Primosols (1.0%) and Spodosols (0.1%), and further into 25 CST Groups and 47 CST Subgroups, making the reference so complicated that there is almost no one to one reference relationship. Analysis of the area ratios and standard deviations of a certain GSCC soil classified by CST showed that the lower the unit for reference, the easier the reference would be. It is clear that Typic Dark Brown Soils can be sorted to Typic Bori-Udic Cambosols only, Bleached Yellow Brown Soils to Typic Ferri-Udic Argosols, Bleached Brown Coniferous Forest Soils and Superfically Gleyed Brown Coniferous Forest Soils to Histic Permi-Gelic Cambosoils, Yellow Cinnamon Like Soils to Typic Hapli-Udic Cambosols, Typic Bleached Podzolic Soils to Gelic Hapli-Orthic Spodosols and Gleyed Dark Brown Soils to Gleyic Hapli-Boric Argosols. In order to make CST more practical and easier to popularize, it is essential and urgent to keep on studying and developing the CST at lower unit level to establish basic soil classification units of CST. The result of the study is of high reference value to proper reference between GSCC and CST and application and development of CST.