首页 | 本学科首页   官方微博 | 高级检索  
     

~(60)Co在小麦-土壤系统中的消长动态
引用本文:赵希岳,蔡志强,潘剑波,王寿祥. ~(60)Co在小麦-土壤系统中的消长动态[J]. 核农学报, 2008, 22(5): 693
作者姓名:赵希岳  蔡志强  潘剑波  王寿祥
作者单位:1. 江苏工业学院化学工程系,江苏,常州,213016
2. 浙江大学原子核农业科学研究所,浙江,杭州,310029
基金项目:国家自然科学基金,江苏省环境保护局科研项目 
摘    要:采用模拟污染物的核素示踪技术研究了60Co在小麦-土壤系统中的迁移、消长和分配动态,并建立了其行为规律的数学模型。结果表明:(1)60Co由表土进入系统后即在系统中发生迁移,小麦主要经根部吸收60Co,然后向其他各部位转移和分配。小麦植株中60Co比活度起初随时间迅速增高,达到某一最大值后开始下降。根中60Co比活度显著高于植株其他部位,小麦各部位中60Co比活度的大小顺序为:麦根>麦秸>麦壳>麦粒;(2)土壤中60Co主要滞留于表层6cm内,其比活度与距土表深度呈单项指数负相关;(3)60Co在小麦-土壤系统中比活度的动态变化规律由多项指数描述;(4)小麦对土壤中的60Co具有一定的富集能力。

关 键 词:60Co    小麦    迁移与分布    分室模型    放射生态学
收稿时间:2009-12-31
修稿时间:2009-12-31

DYNAMICS OF ACCUMULATION AND DISAPPEARANCE OF COBALT-60 IN WHEAT-SOIL SYSTEM
ZHAO Xi-yue,CAI Zhi-qiang,PAN Jian-bo,WANG Shou-xiang. DYNAMICS OF ACCUMULATION AND DISAPPEARANCE OF COBALT-60 IN WHEAT-SOIL SYSTEM[J]. Acta Agriculturae Nucleatae Sinica, 2008, 22(5): 693
Authors:ZHAO Xi-yue  CAI Zhi-qiang  PAN Jian-bo  WANG Shou-xiang
Abstract:The dynamics of transportation,accumulation,disappearance and distribution of ~(60)Co in the wheat-soil system was studied by using isotope-tracer techniques for simulated pollutants,and the mathematical model of the behavior was established.Rescilts showed that(1) ~(60)Co was transported rapidly in the system after the application on soil surface layer.The uptake of ~(60)Co by wheat was mainly via root,and redistribution in all parts of wheat occurred consequently.The concentration in root was much higher than that in other parts of wheat plant.The specific activity of ~(60)Co in wheat plant rapidly increased to a maximum value,then decreased.The specific activity of ~(60)Co in each part of wheat plant was found in the order of root > straw > husk > seed.(2) ~(60)Co is mainly detained with in 6cm of soil surface,and specific activity of ~(60)Co in soil present a simple exponential declining with depth of soil.(3)The dynamic law can be described as multinomial exponential function of concentration in the wheat-soil system.(4)The wheat plant has certain ability to accumulate ~(60)Co from soil.
Keywords:~(60)Co  wheat  migration and distribution  compartment model  radioecology
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《核农学报》浏览原始摘要信息
点击此处可从《核农学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号