水稻对放射性锶的吸收及撒洒硅藻土对其行为的影响  

ABSORPTION OF RADIOSTRONTIUM BY RICE AND EFFECT OF APPLICATION OF KIESELGUR ON ITS BEHAVIOUR

作　　者：史建君[1] 王寿祥[1] 

机构地区：[1]浙江大学原子核农业科学研究所农业部核农学重点开放实验室,浙江杭州310029

出　　处：《核农学报》2003年第3期203-206,共4页Journal of Nuclear Agricultural Sciences

基　　金：浙江省"九五"重点项目 (96 110 30 84 )资助

摘　　要：采用同位素示踪技术研究了水稻对89Sr的吸收及在水稻田中撒洒少量硅藻土对其吸收89Sr的影响。结果表明 :田表水中的89Sr将向水稻转移 ,通过吸附和吸收作用在水稻各部位中积累 ,其稻根中的89Sr比活度高于其余各部位 ;在本试验硅藻土撒洒量的范围内 ,未能明显降低水稻对89Sr的吸收和累积 ;89Sr在水稻中的纵向分布均与土层深度呈单项指数负相关。The absorption of 89 Sr by rice and effect of application of kieselgur on the absorption behaviour were studied using isotope tracer techniques. The results showed that the 89 Sr was transferred and accumulated to rice in the ecosystem by absorption action when 89 Sr was entered the surface water.The specific activity of 89 Sr in root was the highest. The absorption and accumulation of 89 Sr in rice were not decreased significantly by application of kieselgur in the surface water. The specific activity of 89 Sr in soil follows a negative exponential relation with depth of soil profile.

关 键 词：水稻 放射性锶 硅藻土 吸收 积累 纵向分布 土层深度 同位素示踪技术 食物污染 

分 类 号：X173[环境科学与工程—环境科学]