放射性锆在小麦生态系统中的迁移和消长动态  

ACCUMULATION AND TRANSFER OF ^(95)Zr IN WHEAT/SOIL ECOSYSTEM

作　　者：刘立丽[1] 华跃进[2] 赵希岳[3] 史建君[1] 

机构地区：[1]浙江理工大学生命科学院生物化学所,浙江杭州310018 [2]浙江大学原子核农业科学研究所,浙江杭州310029 [3]江苏工业学院生物工程实验室,江苏常州213164

出　　处：《核农学报》2008年第4期495-498,共4页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金(39970147)

摘　　要：采用同位素示踪技术,模拟降雨,研究了污染物95Zr在小麦-土壤系统中的迁移、消长和分配动态。结果显示:95Zr由小麦地上部进入系统后,随即在系统中发生迁移,茎叶、颖壳和根系中95Zr的比活度均较高,但麦粒中接近于本底水平。土壤中95Zr比活度随时间累积逐渐升高,主要滞留在表层(0~6cm),为总土壤含量的97%以上,表明95Zr被表层土壤吸附,不易随水流向下迁移。经分析表明非线性回归方程较好地反应了95Zr在小麦-土壤系统中的消长动态。In this study, isotope tracer technique was used to study the accumulation and transfer of ^95 Zr in a simulated wheat/ soil system. The results showed that^ 95 Zr was mainly accumulated in straw, husk and root. The concentration of^ 95 Zr in food stuff-kernel was relatively lower, which was only slightly higher than the level of background activity. ^95Zr in soil mainly deposited in surface layer soil （0 - 6cm） （97%）. The dynamics of ^95Zr concentration in wheat and soil was also confirmed by application of nonlinear regression method.

关 键 词：95Zr 小麦 消长动态 非线性回归 

分 类 号：X171.5[环境科学与工程—环境科学]