摘要
通过对江西省红壤地区的39个土壤剖面采样数据进行数理统计分析,发现在土壤表层20 cm范围内,不同土层137Cs含量与土壤粒径具有一定的相关性,其中与砂粒含量和粉砂粒含量具有正相关关系,与砾石含量和黏粒含量具有负相关关系。通过逐步回归分析发现,在各土层与137Cs含量关系最为密切是砂砾含量,两者呈现显著的正相关关系。同时建立了137Cs含量与砂砾含量的定量关系模型,并通过方差分析证明该模型可靠,但该模型应用于土壤侵蚀还需要进一步研究。
The 137Cs tracing method is extensively used in the research fields of soil erosion and sediment transportation. For using the method, it is very important to determine the relationship between 137Cs and the composition of soil particles. However, at present, research on this aspect is not well conducted. So, based on the data of 39 soil profiles in different areas of red soil, this paper analyzed the relationship between 137Cs content and the composition of soil particles using statistical methods. The result showed that 137Cs had a positive correlation with sand and silt contents, and had a negative correlation with gravel and clay contents within 20 cm of the soil surface. Then through correlation analysis and stepwise regression analysis, it was found that in different layers, sand content was the main factor contributing to 137Cs. The quantitative model for the relationship between 137Cs and the composition of soil particles was constructed. The model showed that 137Cs increased with the increasing of sand content.
出处
《水土保持通报》
CSCD
北大核心
2006年第4期11-15,共5页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金(40371106
40101007)
教育部"跨世纪优秀人才培养计划"基金(2003)
江苏省"青蓝工程中青年学术带头人培养计划"基金(2002)联合资助
