培肥对土壤酶活性影响的研究

进行了长期定位试验地中土壤有机质和酶活性的测定，结果表明：不同培肥方式对土壤酶活性影响明显，特别是水解酶类中的脲酶反映最显著，过氧化氢酶则较差，揭示出土壤脲酶活性可作为土壤肥力的重要指标；作物对土壤水解酶活性具有明显的增强作用；秸秆和化肥处理可提高土壤的总体酶活性，其中尤以厩肥的增幅为最大；随耕种年限的延长，除无肥处理外，其余培肥方式的酶活性持续增加；对土壤酶活性进行主成分分析，发现起主要作用的是土壤脲酶和尿酸酶。

Study on soil enzyme activities effected by fertilizing cultivation

The soil enzyme activities and organic matter content were assayed in long-term fertilizing soil samples, the results showed as follows:Soil enzyme activity remarkably varied with the fertilizers, especially soil urease. The peroxidase was less and soil urease activity could be as an index of fertility; Plant could enhance hydrolase activity; the maize and chemical fertilizer might improve total enzymatic activity level. The enzyme activities were increased except non-fertilizing treatment. The main factors with the most influence were urease and uratease activities by The Principal Component Analysis of soil enzymes.