[J].HEILONGJIANG AGRICULTURAL SCIENCES,2020,(12):49-53.[doi:10.11942/j.issn1002-2767.2020.12.0049]
长期施肥对黑土脲酶活性和动力学特性的影响
- 文献标志码:
- A
- 摘要:
- 为揭示土壤脲酶活性对长期施肥的响应特征,本文以长期施肥的黑土为供试对象,对土壤脲酶的活性和动力学特性进行研究。结果表明:不同施肥处理和剖面土层变化对土壤脲酶活性变化具有交互作用。与对照相比,有机肥、有机肥配施化肥处理的土壤脲酶活性显著增强,在土壤剖面中,脲酶活性具有随土层加深逐渐递减的趋势。同时,土壤脲酶的酶促反应符合一级反应动力学模型。与不施肥处理相比较,施肥处理的Km值减小,有机肥处理的Vmax和Vmax/Km比值都高于单施化肥处理和对照,长期施用有机肥土壤脲酶催化能力增强。
参考文献/References:
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备注/Memo
收稿日期:2020-10-21