绿黄隆、甲黄隆在江苏省农区5种土壤中残留活性的研究

Study on Residue Activity of Chlorsulfuron and Metsulfuron methyl in Soils of Five Agricultural Areas of Jiangsu Province.

采用改进的玉米主根长土培生测法，研究绿黄隆、甲黄隆在江苏省典型农区土壤中残留活性。结果表明，两种除草剂在５种土壤中剂量与玉米主根长抑制率之间皆达极显著相关，土壤ｐＨ和有机质含量是主要影响因素，碱性轻质土壤中活性较高，酸性重质土壤中活性较低，活性大小顺序为：黄潮土＞高沙土＞砂姜黑土＞滨海盐土＞太湖水稻土。

Corn was selected as the bioassay plant for the study of chlorsulfuron and metsulfuron methyl residue bioactivity in soils of typical agricultural areas of Jiangsu Province. The results of the study show that the inhibition rates of corn root growth is closely related to the application doses of the two herbicides. The ED 50 values reckoned from the dose response model show that ED 50 is negatively correlated with soil pH value and positively correlated with content of organic matter. The degradation and the residue levels of the two herbicides in soils with different conditions were studied and predicted.