黄土高原区^(137)Cs与土壤颗粒及有机质的关系研究  

Study on Relationship Among ^(137)Cs, Soil Particle and Organic Matter in Loess Plateau

作　　者：李仁英[1] 杨浩[1] 赵晓光[1] 唐翔宇[2] 

机构地区：[1]中国科学院南京土壤研究所,江苏南京210008 [2]中国科学院生态环境研究中心,北京100085

出　　处：《水土保持学报》2003年第6期153-155,共3页Journal of Soil and Water Conservation

基　　金：国家自然科学基金(49973027)

摘　　要：研究了黄土高原地区土壤颗粒及有机质对^(137)Cs分布的影响以及^(137)Cs与有机质的关系。结果表明,^(137)Cs与土壤颗粒的剖面分布趋势并不一致,而只是与某一粒级在某一深度上表现出一致性。^(137)Cs与有机质的剖面分布则因不同的利用方式而有所差异。对于非耕作土壤,^(137)Cs与有机质主要分布在土壤剖面的表层;而对于耕作土壤,由于人为的耕作作用,^(137)Cs与有机质都均匀分布在耕作层中。土壤中的^(137)Cs含量与有机碳含量的相关分析表明,两者之间呈显著相关,相关系数为0.791。Influence of soil particles and organic matter on distribution of 137Cs and relationship between 137Cs and organic matter in the Loess Plateau were studied. The results showed that depth distribution pattern of 137Cs wasn't consistent with that of soil particles, only similar to that of certain size soil particles within the surface several centimeters soil. Depth distribution pattern of 137Cs and organic matter depended on the land use. 137Cs and or ganic matter were enriched in the top of soil profile in uncultivated soils. However, depth distribution pattern of 137 Cs and organic matter exhibited uniform pattern in cultivated soils as a result of tillage operation. The relationship between 137Cs and organic carbon was significant at the 0. 01 level with the correlation coefficient of 0. 791.

关 键 词：137Cs 土壤颗粒 土壤有机质 剖面分布 

分 类 号：S157.1[农业科学—土壤学] S158.5[农业科学—农业基础科学]