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首页> 外文期刊>Environmental Science and Pollution Research >Effects of the novel cis-nitromethylene neonicotinoid insecticide Paichongding on enzyme activities and microorganisms in yellow loam and Huangshi soils
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Effects of the novel cis-nitromethylene neonicotinoid insecticide Paichongding on enzyme activities and microorganisms in yellow loam and Huangshi soils

机译：新型顺-硝基亚甲基新烟碱类农药冲虫顶对黄壤土和黄石土壤酶活性和微生物的影响

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摘要

Soil enzyme activity and microbial population play important roles in maintaining soil fertility and ensure crop yield. Paichongding (IPP) is a novel cis-nitromethylene neonicotinoid insecticide, which was recently developed in China. In this study, in order to better understand IPP ecological toxicity, the impact of IPP on soil enzyme activity and microbial population in soils was investigated. The results showed that, urease activity was inhibited by IPP before 75 days incubation, after that this inhibiting effect gradually weakened. IPP had different stimulating effects on the activities of dehydrogenase, protease, and catalase. They were consistently stimulated from the initial time in soils. The results of microbial population indicated that the number of bacteria increased after IPP application compared with the control, fungal number increased before 45 days incubation and then decreased. While actinomycete number decreased during degradation period. DT50 (half-life value), k (degradation rate constant) of IPP in S1 (yellow loam soil), and S2 (Huangshi soil) were found 90 days and 173 days, 0.0077 day(-1), and 0.0040 day(-1), respectively.
机译：土壤酶活性和微生物种群在维持土壤肥力和确保农作物产量方面起着重要作用。 Paichongding（IPP）是一种新型的顺-硝基亚甲基新烟碱类杀虫剂，最近在中国开发。在这项研究中，为了更好地了解IPP的生态毒性，研究了IPP对土壤酶活性和土壤微生物种群的影响。结果表明，孵育75天前IPP抑制了脲酶活性，此后抑制作用逐渐减弱。 IPP对脱氢酶，蛋白酶和过氧化氢酶的活性具有不同的刺激作用。从土壤开始就一直刺激它们。微生物种群的结果表明，与对照相比，IPP施用后细菌数量增加，孵育45天前真菌数量增加，然后减少。降解期间放线菌数减少。发现S1（黄壤土）和S2（黄石土壤）中IPP的DT50（半衰期值），k（降解速率常数）分别为90天和173天，0.0077天（-1）和0.0040天（- 1）。

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