14C－PP333在土壤及作物中的残留

RESIDUES OF 14 C PP 333 IN SOIL AND CROP

研究了１４ＣＰＰ３３３在小麦、水稻、芹菜中的残留。结果表明，１４ＣＰＰ３３３在作物中的残留水平随土壤中滞留水平的提高而提高。小麦籽粒残留水平为１３１～０７５ｐｐｍ，水稻籽粒为０２２ｐｐｍ，芹菜为００１３～００３２ｐｐｍ。１４ＣＰＰ３３３在水稻植株中残留的水平由高到低为穗梗＞叶＞茎＞谷壳＞根＞米；小麦为叶＞籽粒＞穗其余部分＞根＞茎；芹菜为叶＞根＞茎。施入１４ＣＰＰ３３３１３个月后，盆土表层０～１５ｃｍ能测出高于本底的放射性。

Residues of 14 C PP 333 in wheat,rice and celery plant has been studied. The results showed that the residue level of 14 C PP 333 in crop increased with increasing level of 14 C PP 333 in soil. The content of 14 C PP 333 in the grain of wheat and rice were 1 31～0 75ppm and 0 22ppm respectivtly. The content of 14 C PP 333 in celery stem was 0 013～0 032ppm. The level of residue in rice plant was in the order of ear stem>leaf >stem>grain shell>root>grain of rice, and in wheat plant was in the order of leaf>root>stem. The radioactivity in pot soil of 0～15cm surface layer was detected after 13 months of 14 C PP 333 application.