宁镇地区黄棕壤土壤颗粒组成与^(137)Cs含量关系研究  

Relationship between the Soil Particles Composition and the ^(137)Cs Content Using Yellow-Brown Soil in Ningzhen Region

作　　者：隋志龙[1,2] 杨浩[1] 杨九东[1] 王小雷[1] 张明礼[1] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210046 [2]南京工业大学土木工程学院,江苏南京210009

出　　处：《水土保持学报》2010年第5期157-162,共6页Journal of Soil and Water Conservation

基　　金：国家自然科学基金项目(40873071);江苏省土木工程与防灾减灾重点实验室基金项目(JSCE0702);江苏省教育厅基金项目(09KJA170002);南京师范大学优秀博士学位论文培育基金项目(1243211601039)

摘　　要：土壤粒组组成对137Cs含量及其再分配过程具有决定作用,因此,137Cs吸附的粒度效应研究是运用其示踪土壤侵蚀的重要环节。宁镇地区代表性样点的土样测试与数据分析结果表明,黄棕壤耕作土不同粒级的土壤颗粒对137Cs有着不同的吸附效应:(1)<2μm和2～5μm粒级土壤颗粒对137Cs有着较强的吸附能力;(2)5～10μm和10～50μm粒级的土壤颗粒含量与137Cs质量活度之间存在着明显的负相关;(3)>50μm粒级的土壤颗粒含量与137Cs质量活度之间的关系较为复杂;(4)数据分析结果中出现的一些偏差可能与侵蚀作用所造成的颗粒分选以及沉积区物源复杂有关。In the process of ^137Cs redistribution,the particle size composition is among of most important factors influencing on the ^137Cs activity of soil,accordingly the research about the size effect of ^137Cs adsorption has been the important step for ^137Cs as a tracer to study soil erosion.The soil samples testing and its data analysis from the representative sample point in Ningzhen region showed that,the ^137Cs absorption effect is different among the different size particles of the yellow-brown cultivated soils： （1） The ^137Cs absorption efficacy of the soil with the particle size of 2 μm or 2~5 μm is relatively strong;（2） There is a significant negative correlation between the 137Cs quality activity and the soil with the particle size of 5~10 μm or 10~50 μm;The relationship between the ^137Cs quality activity and the soil with the particle size of 50 μm is more complicated;Some deviation of the data analysis results are attribute to the particle classification during the erosion process and complex material source of the depositional areas.

关 键 词：137Cs含量 土壤颗粒组成 吸附效应 黄棕壤 宁镇地区 

分 类 号：S152.4[农业科学—土壤学] P597.1[农业科学—农业基础科学]