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三唑磷的土壤微生物生态效应研究

Keywords: 三唑磷,土壤微生物,土壤呼吸,土壤酶

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Abstract:

在实验室控制条件下,研究了三唑磷浓度分别为0、10、50、100、200mg·kg-1时对土壤微生物数量、土壤基础呼吸及土壤酶活性的影响。结果表明,三唑磷对细菌、真菌及放线菌在培养初期均有不同程度的抑制作用,且抑制效应的持续时间与浓度均呈极显著正相关,对土壤基础呼吸表现出微弱抑制作用;100、200mg·kg-1浓度的三唑磷对土壤中的细菌先抑制后促进,对土壤中的真菌一直具有抑制效应,对土壤中的脲酶及过氧化氢酶活性都有先抑制后激活再恢复的作用,而低浓度三唑磷对这几种酶活性影响不大。

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