高山栎天然林土壤酶活性与土壤理化性质和微生物数量的关系1）

摘要

With Quercus aquifolioides forest soil in the Mill Mountain National Forest Park in Yuxi City , Yunnan Province , by path analysis , we studied the relationships between the soil enzyme activity , physical chemical properties and microorgan-ism quantity.The soil urease, catalase, and invertase activities were gradually decreased with the increasing of soil depth . There were close relationships between soil urease , catalase, invertase activity, soil physical-chemical properties, and mi-crobial quantity .Urease and catalase activity were largely affected by the organic matter .The most important influencing factors on invertase activities were organic matter , available K and alkali-hydrolyzale N .%以云南省玉溪市磨盘山国家森林公园内的高山栎天然林土壤为研究对象，运用通径分析方法，对土壤酶活性与土壤理化因子、微生物数量之间的关系进行了分析。结果表明：土壤脲酶、过氧化氢酶、转化酶活性都是随着土壤深度的加深而逐渐减小；土壤脲酶、过氧化氢酶、转化酶活性均与土壤理化性质、微生物数量之间有着密切的相关关系；影响脲酶和过氧化氢酶活性程度最大的是有机质；影响转化酶活性最重要的因子是土壤有机质、速效钾和碱解氮。