旱地全膜覆盖种植模式对土壤酶活性的影响

Effects of Overall Film Mulching on Soil Enzyme Activities in Dryland

研究了旱地不同覆膜种植模式对土壤水解酶和氧化还原酶活性的影响。结果表明,与常规覆膜种植模式相比,2种全膜覆盖种植模式可明显提高土壤水解酶和氧化还原酶活性。水解酶活性基本呈随土层的增加而降低的变化趋势,而氧化还原酶活性则基本呈随土层的增加而增加的变化趋势。蔗糖酶活性与脲酶、碱性磷酸酶活性间在α=0.05水平上呈显著正相关,而碱性磷酸酶活性与硝酸还原酶活性间则在α=0.01水平上呈显著负相关。

Effects of film mulchings different in mode on activities of soil hydrolase and oxidoredutase were studied. Re- suits show that overall film mulching significantly increased the activities of soil hydrolase and oxidoredutase. The activity of soil hydrolase basically decreased with the increasing of soil depth, but that of soil oxidoreductase displayed a reverse trend. Sucrase was positively related to urease and alkaline phosphatase in activity （ α = 0.05） , while alkaline phospha- tase was negatively related to nitrate reductase in activity （ α = 0.01 ）.