造纸废水灌溉对黄河三角洲盐碱地土壤酶活性的影响

造纸废水含有大量有机营养物质，经生物塘处理后灌溉退化滨海盐碱地可以有效改善土壤化学性质。分析了不同灌溉方式对土壤脲酶、磷酸酶、脱氢酶活性的影响。结果表明：在废水灌溉、清污轮灌和清水灌溉3种处理下，棉田土壤的脲酶、磷酸酶和脱氢酶活性均有显著提高；同样，清污轮灌模式下，轻度、中度及重度盐碱化土壤的脲酶、磷酸酶和脱氢酶活性也均有较显著的提高。较之棉田土壤和轻度盐碱化土壤，中度和重度盐碱化土壤酶活性的提高更为显著，具体表现为，与对照相比，中度盐碱化土壤的脲酶、磷酸酶以及脱氢酶活性分别提高了44.7%、15.6%、12.4%， 重度盐碱化土壤分别提高了823%、551%、320%。研究证明造纸废水灌溉不但可以提升退化盐碱地的土壤肥力，还可以显著提高退化盐碱地的土壤酶活性。

The influence of irrigation with paper mill effluent on enzyme activity in the saline-alkaline lands of Yellow River Delta

Paper mill effluent contains a lot of organic matter,which can be used to improve the chemical properties of degraded coastal saline-alkaline lands after biological pond treatment.At the same time,the increase of soil organic matter after irrigation provided a lot of carbon source for microbes,the microbes have grewed with using these carbon souce,which increase the enzyme activity.The soil enzyme activity and soil fertility also has certain correlation.The urease activity is related to the amount of substr...