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通过实验室培养试验,研究了不同浓度的氯嘧磺隆对6种土壤酶活性的影响,结果表明:低浓度处理(5、10μg/kg干土)能在短期内激活土壤脲酶、过氧化氢酶、酸性磷酸酶的活性,抑制蔗糖酶和脱氢酶的活性,但这种激活或抑制作用很快可以恢复;高浓度处理(20、50μg/kg干土)短期内抑制脱氢酶的活性,之后表现为强烈的激活作用,对其他5种酶都表现为抑制作用,这些激活和抑制作用的程度与氯嘧磺隆的浓度呈正相关。低浓度氯嘧磺隆对各种酶的影响小,试验后期基本能恢复到对照水平,高浓度处理后土壤酶活性则不太容易恢复。
The effects of different concentrations of chlorimuron-ethyl on the activities of six soil enzymes were studied in laboratory culture experiments. The results showed that low concentrations of soil urease, hydrogen peroxide Enzyme activity and acid phosphatase activity, inhibit sucrase and dehydrogenase activity, but this activation or inhibition can be quickly restored; high concentration treatment (20,50μg / kg dry soil) in the short term inhibition of dehydrogenase activity , Followed by a strong activation of the other five kinds of enzymes showed inhibition, the degree of activation and inhibition and the concentration of chlorpromazine was positively correlated. The low concentration of chlorimuron-ethyl had little effect on various enzymes, and basically recovered to the control level at the later stage of the experiment. However, the activity of soil enzyme after high-concentration treatment was not easy to recover.