绿磺隆对水稻的残留危害剂量

Injured dose of Chlorsulturon on rice.

用田间模拟试验法，研究了土壤中绿磺隆不同添加量与水稻危害剂量的关系。结果表明：稻田绿磺隆添加量超过０．３７５ｇ（ＡＩ）／ｈｍ￣２时，就可能对水用产生危害，在此用量水平下，绿磺隆在耕层土壤中的平均残留浓度为０．１７μｇ／ｋｇ，按此推算，麦田按正常用量的２倍量（３０ｇ／ｈｍ￣２）施用，在种麦期间绿磺隆在麦田土壤中的半衰期超过３２．１ｄ．即会对水稻产生危害。

This paper studied the paddy injured doseadding Chlorsulfuron to soil by simulated field application.The results showed that the rice was injured if the dose ofChlorsulfuron adding to paddy soil was more than 0.375 g(AI)/hm￣2,This mneans that residue concentration ofChlorsulfuron in plough soil was 0.17 μg/kg, It could be reck-oned that if the double recommendatory dose of Chlorsulfuron(30g /hm￣2)was used and the halflife of it in wheat soil wasmore than 32.1 days, the rice would be injured.