Studies on the dynamics of transportation

accumulation

disappearance and distribution of 60 Co in the wheat-soil system were accomplished. It was shown that 60 Co was transported rapidly in the system after it was put into the surface layer of soil. 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 to be arranged in order of root 》 straw 》 husk > seed. 60 Co is mainly detained in 5cm of soil surface

and specific activity of 60 Co in soil present an individual exponential declining with depth of soil. The wheat plant has some ability to accumulate 60 Co in soil.