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铅污染水稻土的微生物活性

Keywords: 铅污染,土壤微生物生物量,土壤基础呼吸作用,脲酶,脱氢酶

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Abstract:

采用盆栽试验方法,研究了受外源铅污染(0 ̄1200mg.kg-1)种植水稻后的青紫泥的微生物量碳、基础呼吸作用、代谢商及土壤脲酶、脱氢酶的变化,分析了外源铅污染的水稻土微生物学特性。结果表明,随培养时间延长,水稻土生物量碳呈下降趋势,基础呼吸作用随铅浓度升高而加强;土壤代谢商随铅浓度升高变化趋势不同;土壤脲酶、脱氢酶活性随铅处理浓度升高明显受抑制;土壤有效铅与土壤微生物生物量碳及土壤脲酶呈显著负相关。

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