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研究中供试的21种农药均不同程度地抑制了土壤脲酶活性.其中,拌种双,福美双和退菌特等显示了较强的抑制作用,禾穗胺等少数农药的抑制作用微弱.温度能明显影响农药对酶的抑制作用,但不同温度下脲酶抑制率变化趋势主要取决于农药的性质.农药的浓度也会影响脲酶活性,因此尿素水解速率也有差异.高剂量农药处理,尿素水解高峰期推迟时间长;低剂量时推迟时间短.
The 21 pesticides tested in the study all inhibited the soil urease activity to varying degrees, of which, the seed dressing double, the United States and the United States and the United States back to the United States and other special top showed a strong inhibitory effect, Which could significantly affect the inhibitory effect of pesticides on the enzyme, but the tendency of the inhibition rate of urease under different temperatures mainly depends on the nature of the pesticides. The concentration of pesticides also affects the urease activity, so the rate of urea hydrolysis is also different. High-dose pesticide treatment, urea hydrolysis peak Period delayed a long time; low dose delayed time short.