【摘要】 田间小区试验结果表明,土壤温度对乙草胺药效和药害影响没有明显规律,降水量及除草剂用量对乙草胺的药效和药害均有一定的影响。乙草胺的药效和药害并不是随着土壤温度的升高呈现逐步增高的趋势,而是随着乙草胺用药量的增加及施药前降水量的增高而提高。如果施药前7d没有降水会显著降低乙草胺的除草效果和对大豆的药害程度。乙草胺药害可使大豆苗期株高、鲜重和叶片数有所降低,成株期株荚数、株粒数减少,导致大豆减产0%～50.6%。药害严重时可使大豆晚熟。更多还原

【Abstract】 The plot experiment results showed that rainfall and herbicide dosage are factors which influence obviously the effect and injury of acetochlor. The effect and injury of acetochlor weren’t influenced obviously by soil temperature. The control effect and injury of acetochlor increased with acetochlor dosage raising and rainfall increasing before 7d using acetochlor. Soybean growth was inhibited lightly, the plant height, fresh weight, leaves, pods and grains were reduced and the rate of yield loss was 0%～50.6% due to the injury of acetochlor. Ripeming date could be delayed when the injury was serious.更多还原