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珙桐林土壤有机质与酶活性的通径分析

CHINESE JOURNAL OF APPLIED & ENVIRONMENTAL BIOLOGY(2010)

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Abstract
为正确评价珙桐林土壤酶活性对土壤有机质的影响程度,运用通径分析的方法研究了绵竹白云山原始珙桐林土壤有机质与酶活性的关系.结果表明,脲酶活性对土壤有机质的直接通径系数和决定系数值均较大,成为5种土壤酶中影响土壤有机质的最主要因素,过氧化氢酶、酸性磷酸酶和蛋白酶对土壤有机质的显著相关性主要是通过脲酶活性的间接影响.因此,珙桐林土壤脲酶活性可以表征土壤有机质的含量状况,可作为评价土壤肥力的一个重要指标.
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Key words
Davidia involucrate,soil organic matter,soil enzyme activity,urease,soil fertility,path analysis
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