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核磁共振波谱法研究玉米植株残体培肥对土壤胡敏酸的影响

Keywords: 玉米植株残体,土壤胡敏酸,核磁共振波谱

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Abstract:

用核磁共振波谱法研究了施入玉米秸秆和根茬后土壤胡敏酸(HA)的变化。结果表明,玉米植株残体施用后,土壤HA的烷基链变短且多分支;土壤HA的芳香度降低,芳香碳减少,而烷基碳和烷氧碳增加,HA的脂肪族特性增强,氧化程度降低;发生变化最大的时期在施入玉米植株残体60d左右,且玉米秸秆对土壤胡敏酸的影响要大于根茬的影响。

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