【摘要】 研究了60Co 在菜豆-土壤系统中的迁移、消长与分配动态. 结果表明:(1)60Co 由表土进入系统后即在系统中发生迁移,菜豆主要经根吸收60Co,然后向其各部位转移和分配. 根中60Co 放射活度显著高于植株其它部位.(2)土壤中60Co 活度由表层至底层呈单项指数负相关.90% 以上集中表层6cm 之内. (3)60Co 在菜豆-土壤系统中活度的动态变化规律由多项指数描述更多还原

【Abstract】 Studies on the dynamic of transportation,accumulation,disapperance and distribution of 60 Co in the bean soil system were accomplished.The results are as follows:1. 60 Co was transported rapidly in the system after it was put into the surface layer.The uptake of 60 Co by bean was mainly via root,and redistribution in all parts of bean occurred consequently.The concentration in root was much higher than that of hers parts of bean plant.2.The negative correlation between the concentration of 60 Co in the soil and depth was detect,over 90 per cent of 60 Co was retamed with in 6 centimeters of the surface layer.3.The dynamic law can be discribed as multinomial exponential function of concentration in the bean soil system.更多还原