滇中地区常绿阔叶林土壤酶活性与理化因子通径分析

发布时间：2018-10-19 10:27

【摘要】：为探究天然常绿阔叶林理化因子对土壤酶活性的影响,运用通径分析方法研究了云南省玉溪市磨盘山国家森林公园内的天然常绿阔叶林土壤理化因子与土壤酶活性之间的关系。结果表明:(1)土壤田间持水量、有机质、碱解氮、全磷、速效钾含量和土壤酶活性均表现出比较明显的表聚现象,土壤容重、全钾含量随着土层深度的加深而增加;(2)土壤脲酶、过氧化氢酶、转化酶活性与理化性质之间有着密切的相关关系;土壤碱解氮、全磷、速效钾强烈的直接作用是影响该区土壤脲酶和转化酶活性的主导因子,而土壤有机质、土壤容重强烈的直接作用是决定土壤过氧化氢酶活性的主导因子,其他因子的间接作用也是影响该区土壤酶的重要因子。
[Abstract]:In order to investigate the effect of physical and chemical factors on soil enzyme activity in natural evergreen broadleaved forest, the relationship between soil physical and chemical factors and soil enzyme activity in natural evergreen broadleaved forest in Moanshan National Forest Park of Yuxi City, Yunnan Province was studied by path analysis. The results showed that: (1) the soil water holding capacity, organic matter, alkali-hydrolyzed nitrogen, total phosphorus, available potassium content and soil enzyme activity all showed obvious superfluous phenomenon, soil bulk density and total potassium content increased with the deepening of soil depth; The activities of catalase, invertase and physicochemical properties are closely related to each other, and the strong direct effects of soil alkaline hydrolyzed nitrogen, total phosphorus and available potassium are the main factors affecting soil urease and invertase activities, while soil organic matter. The direct action of soil bulk density is the main factor that determines the activity of soil catalase, and the indirect action of other factors is also an important factor affecting soil enzyme in this area.
【作者单位】：西南林业大学环境科学与工程学院;
【基金】：国家林业公益性行业科研专项(20120401-10) 云南省高校优势特色重点学科(生态学)建设项目(05000511311)
【分类号】：S714

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