二氯丙烯胺和解草酯对油菜施用乙草胺后的解毒效果研究

Study of the Detoxification Effect of Dichlormid and Cloquintocet-mexyl on Phytotoxicity of Acetochlor on Rape

采用培养皿法，以油菜（Brassica napus L.）的根长、芽长为测试指标，探讨了二氯丙烯胺和解草酯分别与乙草胺混用对油菜施用乙草胺后的解毒效果。结果表明，50～400mg／L 的乙草胺对油菜根、芽生长有较强的抑制作用，抑制作用与除草剂用量呈正相关；分别加入不同浓度的安全剂二氯丙烯胺和解草酯后，均能在一定程度上减轻乙草胺对油菜生长的药害。其中20mg／L 的二氯丙烯胺对200mg／L 的乙草胺的解毒效果最明显，对油菜根的解毒效果为10.16％，对芽的解毒效果为31.32％；100mg／L 的解草酯对乙草胺的解毒效果比其他浓度的解毒效果好。2种安全剂分别与乙草胺混用均能在一定程度上缓解乙草胺对油菜根芽生长的抑制作用，并且在对根和芽的解毒效果之间有明显的差异。

The rape foots and shoots as the text indexes,the detoxifications of dichlormid and cloquintocet-mexyl to acetochlor were assayed with rape in culture dish. The results showed that there was a strong inhibitory effect of acetochlor herbicide to rape roots and shoots with its concentration during 50 ~ 400 mg / L,and the inhibition effect and dosage of herbicide were positively correlated. After adding certain concentration of safener,it can ease the injury of acetochlor herbicide on rape growth to a certain degree. The detoxification of 20 mg / L( a. i.) dichlormid amended acetochlor 200 mg / L( a. i.) to rape roots and shoots was the best,it was10. 16% and 31. 32% respectively. The detoxification of 100 mg / L( a. i.) Cloquintocet-mexyl was better than other concentrations to the injury of acetochlor on rape. It's turned out that both two safeners can reduce the inhibitory effect of acetochlor to the growth of rape's roots and shoots to some extent,and the detoxification effect was obviously different between rape's roots and shoots.