己酸二乙氨基乙醇酯缓解氯磺隆对玉米药害的研究

Studies on the Action of DA-6 Reducing the Phytotoxicity of Chlorsulfuron on corn

采用室内土培法分别测定了不同浓度己酸二乙氨基乙醇酯(简称DA-6)和不同浓度氯磺隆对玉米生长的影响,不同浓度氯磺隆处理土壤DA-6浸种对玉米根生长的影响。结果表明DA-6浓度在0.5～20mg/L范围内,玉米根长、根鲜重和株高、株鲜重高于对照,其中以5mg/L最好;氯磺隆处理浓度自0.25μg/kg起,明显抑制玉米幼苗的生长,且对主根长和根鲜重的抑制作用较株高和株鲜重更为严重;当用5 mg/L的DA-6浸种可不同程度地缓解0.25～8μg/kg的氯磺隆对玉米的伤害。

The paper presented the effect of DA-6 and chlorsulfuron on the growth of corn seedlings at the different concentrations in soil using bioassay methods in the room.The results showed that the growth of corn was strongly inhibited when soil chlorsulfuron was over 0.25μg/ kg,and the percent of inhibition of main root length and root fresh weight were higher than that of corn height and corn fresh weight.The treatment seedlings with 0.5～20 mg/L DA-6 gave an increment in the main root length and root fresh weight compared with check,with 5mg/L being the optimum.The 5mg/L DA-6 could alleviate harmful effect to the corn when chlorsulfuron was 0.25～8μg/kg in soil.