摘要
[目的]为确定广西百色右江河谷土壤在中国土壤系统分类中的类型归属。[方法]选取不同海拔高度和不同母质类型6个土壤剖面进行描述及土壤理化性质分析,研究了土壤的形成特征,并按照《中国土壤系统分类检索(第三版)》检索,确定各剖面的诊断层、诊断特性及其在土壤系统分类中的位置。[结果]百色右江河谷土壤形成特征有淋溶作用和富铁化特征。由第四纪红土及砂页岩残积物发育的土壤pH较低,呈酸性,盐基饱和度较低,而由第三纪泥岩和石灰岩残积物发育的土壤pH较高,呈中性或碱性,盐基饱和度高。游离氧化铁占全铁含量45.2%以上,B层土壤黏粒硅铝率在2.08～2.69之间。[结论]右江河谷土壤在系统分类中可划归为1个土纲1个土类。
[Objective] To attempt to define the soil in Baise Youjiang river valley in Guangxi according to the Chinese Soil Taxonomy.[Method] The physical and chemical properties of soils of six soil profiles in different elevation and parent material types collected from the river valley were studied.Based on the Chinese Soil Taxonomy（3rd edition）,the diagnostic horizons and diagnostic characteristics of the soil profiles as well as related taxonomic classification category were also defined.[Result] There were the eluviation and ferrugination in the soil.In the soils of horizons of the soil profiles developed from the quaternary red clay and gritstone,the soil pH and base-saturation percentage were low,while those in the soils developed from tertiary period mudstone and limestone were high.Moreover,the contents of free iron oxide were over than 45.2%.The Sa values of B horizons in the soil profiles were 2.08-2.69.[Conclusion] There was one subgroups including one orders in Baise Youjiang river valley in the present study.
出处
《安徽农业科学》
CAS
2012年第23期11668-11671,共4页
Journal of Anhui Agricultural Sciences
基金
广西自然科学基金项目(桂科自0991202)
关键词
广西
百色右江河谷
形成特征
土壤系统分类
Guangxi
Baise Youjiang river valley
Formation characteristics
Soil taxonomy
