^（110m）Ag在农作物和土壤中的转移、积累与分布

TRANSLOCATION,ACCUMULATION AND DISTRIBUTION OF (110m)￣Ag IN CROPS AND SOILS

盆栽春小麦、油菜、菜豆、莴苣、西红柿、元白菜，苗期随灌水施入比活度分别为３．７３Ｂｑ／ｇ土、３７Ｂｑ／ｇ土、３７０Ｂｑ／ｇ 土的放射性核素（１１０ｍ）￣Ａｇ，常规管理，成熟期一次性收获，取根、茎、叶、果实等不同器官及不同层次土红测定放射性。结果表明，由土壤进入作物中的（１１０ｍ）￣Ａｇ量随土壤中（１１０ｍ）￣Ａｇ比活度的增大而增多．其中粮增加幅度最大，（１１０ｍ）￣Ａｇ的含量最高；地上部主要积累在茎和叶中；某些果实内也有较高积累．栽培作物的土壤中，约８０％的（１１０ｍ）￣Ａｇ滞留在表层２ｃｍ土壤内，越往深处（１１０ｍ）￣Ａｇ分布越少。

Amount of (110m)￣Ag absorbed by crops increased with the specific activity of (110m)￣Ag in soil,and amount of(110m)￣Ag in roots was the greatest among the crop' s organs.In above-groundparts(110m)￣Ag was mainly distributed in stems and leaves.There was a high accumulation infruits. The(110m)￣Ag content in stems and leaves reduced gradually from botom to top. The be-havlour of (110m)￣Ag in soils showed that more than 80% of (110m)￣Ag was distributed in the upperlayer of 0～2cm in crop-growrt solil.