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为了探讨不同土地利用方式对土壤酶活性的影响,以上海崇明不同年龄水杉林(16、25、35年生)、香樟林(20年生)和毁林地(曾为25年生柳杉林)为研究对象,并以附近的水稻田作为对照,分析不同土层(0~10、10~20和20~30 cm)的土壤脲酶、蔗糖酶、过氧化氢酶和碱性磷酸单酯酶活性,探讨不同土地利用方式对土壤酶活性的影响。结果表明:(1)各土壤酶活性在不同土地利用方式条件下差异均达到显著水平(P<0.05),农田向林地转化能提高土壤酶活性,促进土壤性状的改善,而毁林会使之降低。(2)不同土地利用类型中造林树种、造林年份也是影响土壤酶活性的重要因素,林龄与土壤酶活性呈显著的线性相关关系,且香樟林土壤酶活性强于水杉林,对土壤微生物学性质的改善能力最佳。(3)土壤酶活性随着土壤深度的增加而逐渐降低,具有很强的表聚性。(4)同一土地利用方式下土壤脲酶、蔗糖酶、磷酸单酯酶活性之间具有显著或极显著的相关性(P<0.05或P<0.01),而过氧化氢酶与其他酶活性的相关性相对较弱。
In order to investigate the effects of different land use types on soil enzyme activities, the effects of different ages of Quercus variabilis (16, 25, 35 years), camphor trees (20 years old) and deforestation (25 years old) The soil urease, invertase, catalase and alkaline phosphatase activity in different soil layers (0 ~ 10, 10 ~ 20 and 20 ~ 30 cm) Effect of Different Land Use on Soil Enzyme Activity. The results showed that: (1) The differences of soil enzyme activities reached significant levels (P <0.05) under different land use patterns. The conversion of farmland to forest land could improve the soil enzyme activity and promote the improvement of soil properties, reduce. (2) The afforestation species and afforestation year in different types of land use are also important factors affecting soil enzyme activity. There is a significant linear correlation between forest age and soil enzyme activity, and the soil enzyme activity of camphora is stronger than that of Metasequoia glyptostroboides, Learning ability to improve the best. (3) Soil enzyme activity decreased with the increase of soil depth, with strong surface aggregation. (4) There was a significant or extremely significant correlation between soil urease, invertase and phosphate monoester enzyme activities under the same land use pattern (P <0.05 or P <0.01), while catalase activity was correlated with other enzyme activities Sex is relatively weak.