引用本文:张 楚,袁大刚,宋易高,陈剑科,付宏阳.川西地区具有机土壤物质特性土壤的系统分类[J].土壤学报,2018,55(5):1085-1097.
ZHANG Chu,YUAN Dagang,SONG Yigao,CHEN Jianke,FU Hongyang.Taxonomy of Soils Featuring Organic Soil Materials in West Sichuan, China[J].Acta Pedologica Sinica,2018,55(5):1085-1097
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川西地区具有机土壤物质特性土壤的系统分类
张 楚,袁大刚,宋易高,陈剑科,付宏阳
四川农业大学资源学院,四川农业大学资源学院,四川农业大学资源学院,四川农业大学资源学院,四川农业大学资源学院
摘要:
川西部分地区的气候和地形不利于有机土壤物质的矿化分解,形成了具有机土壤物质特性的土壤,这类土壤与矿质土壤存在明显的区别。为了研究川西地区具有机土壤物质特性土壤的系统分类归属,选取川西地区6个具有机土壤物质特性的土壤剖面作为研究对象,基于成土条件、土壤剖面特征和理化性质的分析,按照《中国土壤系统分类检索(第三版)》,顺序检索供试土壤的诊断层和诊断特性,确定其在系统分类中的地位。结果表明,供试土壤归属于有机土、淋溶土和潜育土3个土纲,细分为3个亚纲,4个土类和6个亚类。依据《中国土壤系统分类土族与土系划分标准》,建立了6个土族和6个土系。据此可知,具有机土壤物质特性的土壤并不全是有机土,也可能是淋溶土或潜育土;有机土并不一定具有机表层,如埋藏亚类的有机土。相比于发生分类,系统分类能够更准确地区分同一区域具有近似生物气候条件的土壤类型。
关键词:  有机土壤物质  诊断层  诊断特性  土壤系统分类  土系  有机土
DOI:10.11766/trxb201711210493
分类号:
基金项目:国家科技基础性工作专项项目(2014FY110200A12)
Taxonomy of Soils Featuring Organic Soil Materials in West Sichuan, China
ZHANG Chu,YUAN Dagang,SONG Yigao,CHEN Jianke and FU Hongyang
College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University
Abstract:
In certain regions of West Sichuan, the climate and topography is not very conducive to mineralization and decomposition of organic materials in the soil, thus making the soil enriched with organic soil materials and significantly different from mineral soils. 【Objective】In order to study where to put the soils rich in organic soil material in the western part of Sichuan in the soil taxonomy, this study was conducted. 【Method】Six soil profiles featuring such soils were selected in areas as research objects. Forming conditions, morphological characteristics and physicochemical properties of the soils were analyzed to determine diagnostic horizons and diagnostic features of the soils, by referring to the “Keys to Chinese Soil Taxonomy (third Edition)” and then find niches for these soil in the soil taxonomy. 【Result】Results show that the selected soils could be sorted into three soil orders (Histosols, Argosols and Gleyosols), and further into three suborders, four soil groups and six subgroups. According to the “Criteria for Establishment of Soil Family and Soil Series in the Chinese Soil Taxonomy”, the six soils were ruled into six soil families and six series. 【Conclusion】It was found that the soils rich in organic soil material were not necessarily always to be Histosols, while they could be either Argosols or Gleyosols. And Histosols might not necessarily have a Histic epipedon. The Histosols of Buric subgroup were good examples. Compared with the soil genetic classification system, the soil taxonomy could distinguish more accurately soil types from each other in the same area under similar bioclimatic conditions.
Key words:  Organic soil materials  Diagnostic horizons  Diagnostic characteristics  Soil taxonomy  Soil series  Histosols