施用钾盐对降低^(137)Cs从土壤──农作物转移率的效应  

EFFECT OF POTASSIUM SALTS ON THE TRANSFER OF 137Cs\=IN SOILPLANT SYSTEM

作　　者：朱永懿[1] 杨俊诚[1] 陈景坚[1] 刘学莲[1] 徐寅良[2] 孙志明[2] 

机构地区：[1]中国农业科学院原子能利用研究所 [2]浙江大学核农所

出　　处：《核农学报》1999年第4期242-247,共6页Journal of Nuclear Agricultural Sciences

摘　　要：应用盆栽和模拟小区连续３年就施用硫酸钾、碳酸钾、氯化钾对降低１３７Ｃｓ从土壤农作物转移率的效果进行试验。结果表明，３种钾盐可以大大降低植株中的１３７Ｃｓ的污染，其中硫酸钾的效果最好，第２年第３年的后效表现非常稳定。钾盐的最适施用量以土壤阳离子代换量的１／３０为宜。施用钾盐主要是有效地降低了土壤中代换性１３７Ｃｓ的含量，从而降低了１３７Ｃｓ从土壤农作物的转移率。A study on reducing the transfer of 137Cs from soil to plant was conducted by pot and plot experiment using potassium sulfate, carbonate and chloride. The result showed that all of the three kinds of potassium salts could reduce the transfer of 137Cs in soilplant system, of which the potassium sulfate performed best and had a stable later effects in the second and third year. The available amount of potassium salt to apply was explored and it was found that 1/30 of soil available cation was suitable. The mechanism could be explained as that the available 137Cs in soil was reduced effectively by the application of potassium salt so that the transfer of 137Cs in soilplant system decreased significantly.

关 键 词：钾盐 小麦 水稻 土壤 ^137CS 转移 

分 类 号：S132[农业科学—农业基础科学] X591[环境科学与工程—环境工程]