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研究不同生长年限紫花苜蓿(Medicago sativa)对土壤养分和酶活性的影响,探讨土壤酶活性作为土壤肥力指标的可能性。结果表明,不同生长年限苜蓿地不同土层土壤养分含量和酶活性与对照存在显著差异(P<0.05)。土壤脲酶、过氧化氢酶、过氧化物酶活性与土壤养分有一定的相关性,可以用来表示土壤肥力的高低,也可以作为敏感的土壤生物学指标。但土壤多酚氧化酶活性与土壤养分相关性较差。
The effects of alfalfa (Medicago sativa) on soil nutrients and enzyme activities were studied to investigate the possibility of soil enzyme activity as an indicator of soil fertility. The results showed that there were significant differences in soil nutrient contents and enzyme activities in alfalfa land under different growing seasons compared with the control (P <0.05). Soil urease, catalase, peroxidase activity and soil nutrients have some relevance, can be used to indicate the level of soil fertility, but also can be used as sensitive soil biological indicators. However, the correlation between soil polyphenol oxidase activity and soil nutrient was poor.