除草剂解毒剂ND2144减轻乙草胺残留对玉米的药害作用

Herbicide Antidote ND2144 Protect Maize from the Residual Injury of Acetochlor

采用室内生物测定方法,研究了除草剂解毒剂ND2144(N-二氯乙酰基-2-甲基-1-氧杂-4-氮杂-螺[4.4]壬烷)减轻除草剂乙草胺残留对玉米产生的药害,初步探讨其解毒机理。结果表明:随土壤中乙草胺残留浓度的增加,玉米的生长受到抑制。采用不同浓度ND2144浸种处理后,均可在一定程度上减轻乙草胺残留对玉米产生的药害。当土壤中乙草胺的残留浓度为10～20mg·kg-1,ND2144的浸种浓度为8mg·kg-1时解毒效果最好,玉米株高、株鲜重的恢复率可达对照的102.56%和97.19%,幼苗中的谷胱甘肽(glutathione,GSH)含量和乙酰乳酸合成酶(acetolactate synthase,ALS)活性分别达到对照的108.1%和142.9%。

Using bioassay method, how herbicide antidote ND2144 alleviates the injury from the acetochlor on maize was studied in details, the mechanism was also discussed primarily. The results showed that, with the increasing of acetochlor concentration in soils, the growths of maize were inhibited. The injury of acetocblor to maize could be, to some extent, reduced after the seeds were soaked in different concentration antidotes. The optimal protection condition was that the residue concentration of acetochlor in soils was 10-20 mg·kg^-1 and antidote concentration was 8 mg·kg^-1. The recovery rates of maize height, piant fresh weight could reach 102.56% and 97.19%, the content of GSH and the activity orALS also increased to 108.1% and 142.9%, respectively.