绿黄隆在麦茬土壤中的残留及其对后茬水稻的影响

Study on the Residue of Chlorsulfuron in Wheat Stubbe Soil and its Effect on the After Reap Rice

应用核素示踪技术，以１４Ｃ－绿黄隆进行麦茬土壤残留及其对后茬水稻影响的盆栽试验研究。结果表明，施于麦地的绿黄隆经过麦季（２０６ｄ）后有２５％～３０％残留于土壤；经过麦－稻两季（３２６ｄ）后仍有约１５％的绿黄隆残留在土壤中；麦茬土壤中残留的绿黄隆严重影响后茬水稻根系生长，进而影响植株的生长发育；水稻植株残留量和转移系数是根系＞＞茎叶＞稻谷，在各部位的分布是不均匀的。

The research on the persistent of 14C-chlorsulfuron and its effect on the after reap rice through technique of nuclear trace shows that one wheat season after its application,about 25% of the chlorsulfuron remained in the soil.The residue raised with the increment of the application amount of chlorsulfuron. After one rice season and one wheat season(326 days),the residue of chlorsulfuron accounted for about 15% of the privitive dose.The residue of springapplied chlorsulfuron was higher than the residue of autumn-applied chlorsulfuron.The residue of chlorsulfuron in wheat stubble soil had a marked effect on the growth of after reap rice.The residue in root is much higher than in the other parts of the plant,which explains clearly that the negative effect of chlorsulfuron on the growth of root is related to the high accumalation of chlorsulfuron in root.