新型除草剂解毒剂减轻氯嘧磺隆残留对玉米的药害作用及机理

以垦玉6号玉米为试验材料,采用土培法研究新型除草剂解毒剂N-二氯乙酰基-2-甲基-1-氧杂-4-氮杂-螺4.4]壬烷减轻除草剂氯嘧磺隆残留对玉米产生的药害,初步探讨其机理。研究结果表明,随土壤中氯嘧磺隆残留浓度增加,玉米生长受到抑制。采用不同浓度解毒剂浸种处理后,均可在一定程度上减轻氯嘧磺隆残留对玉米产生的药害。当土壤中氯嘧磺隆的残留浓度为2μg/kg,解毒剂的浸种浓度为5 mg/kg时解毒效果最好,玉米株高和主根长的恢复率可达对照的109.71%和90.99%,幼苗中的谷胱甘肽(GSH)含量和乙酰乳酸合成酶活性(ALS)分别达到对照的106.8%和116.7%。

Effect and Mechanism of New Antidote in Protecting Maize from the Residual Injury of Chlorimuron

Maize Kenyu 6 was used as indicator plant to study the herbicide antidote N-dichloroacetyl-2-methyl-1-oxa-4-aza-spiro-4.4-nonane on protecting maize residual injury from chlorimuron by bioassay method.And discuss the mechanism of affection preliminarily.The results of experiment showed that,with the increase of chlorimuron concentration in soils,the growths of maize were inhibited.The harm of chlorimuron to maize,to some extent,reduced after soaking seeds in different concentration antidotes.The protection was the best when the residue of chlorimuron in soils was 2 μg/kg and the concentration of antidote was 5 mg/kg.The recovery rates of maize height and root length could reach 109.71% and 90.99%,the content of GSH and the activity of ALS also increased to 106.8% and 116.7%,respectively.