放射性钴在模拟水稻田中的迁移模型  

A transference model of radioactive cobalt in simulated paddy

作　　者：孙志明[1] 陈传群[1] 王寿祥[1] 王继延[2] 

机构地区：[1]浙江大学原子核农业科学研究所,杭州310029 [2]华东师范大学数学系,上海200062

出　　处：《生态学报》2001年第6期938-941,共4页Acta Ecologica Sinica

基　　金：国家自然科学基金!( 3 9570 1 4 9)

摘　　要：研究了放射性钴 ( 6 0 Co)在模拟水稻田中的迁移、消长的动力学模型。结果表明 ,水稻田表水中 6 0 Co浓度随时间延长单调降低 ;水稻植株中 6 0 Co浓度在经历一最大值后下降 ,其各部位中 6 0 Co浓度大小顺序是 :稻根 >稻草 稻壳 >糙米 ;各处理土壤中 6 0 Co浓度随距表层深度按单项指数衰减 ,不同处理的土壤中 6 0 Co的平均浓度则与时间负相关。6 0 Co在田表水、土壤、水稻植株中浓度的大小顺序是 :水稻植株 >土壤 >田表水。The dynamic model of transference,accumulation and disappearance of active cobalt in the simulated paddy were studied.The results showed that concentration of 60 Co in paddy water was decreased monotonously with time.The concentration of 60 Co in rice plant was increased to peak a period and then declined,and the magnitude of concetration was:root>strawhusk>brown rice.The concentration of 60 Co in the soil for idendical treatments presents an individual exponential declining with depth of soil;The average concentration of 60 Co in the soil for differint treatments presents declining with time.The magnitude of concentration of 60 Co in the each parts was:rice>soil>water.

关 键 词：钴-60 水稻田 浓集系数 迁移模型 土壤 

分 类 号：X591[环境科学与工程—环境工程]