猫儿山不同海拔典型植被带土壤酶活性变化特征

Soil Enzyme Activities in Typical Vegetation Zones along an Altitude Gradient in Mao'er Mountain

为研究猫儿山不同海拔典型植被带土壤酶活性的变化规律,对该保护区内4个不同海拔植被带的5种土壤酶活性进行了分析测定。结果表明:随着海拔的上升,土壤磷酸酶、多酚氧化酶和过氧化氢酶活性随海拔上升呈递增趋势,而土壤脲酶和蔗糖酶活性呈递减趋势。不同海拔植被带土壤酶活性与土壤理化性质的相关性分析结果表明,除了全磷外,土壤过氧化氢酶活性与其它理化性质之间的相关性均达到显著或极显著水平。土壤过氧化氢酶活性与脲酶和蔗糖酶活性之间呈显著负相关关系。土壤过氧化氢酶活性与土壤理化性质及其它酶活性之间的相关性最为显著。猫儿山不同海拔典型植被带土壤酶活性呈现一定的变化规律,该结果揭示了不同海拔土壤酶活性的差异及空间分布特点,为猫儿山不同海拔森林土壤的利用和改良提供理论依据。

For the study of variation of soil enzyme activities in typical vegetation zones along an altitude gradient in Mao＇er Mountain, 5 soil enzyme activities were analyzed in 4 typical vegetation zones. The results showed that soil phosphatase, polyphenol oxidase and catalase activities increased along with the altitude gradient, but soil urease and sucrase activities decreased. The correlation analysis results showed that in addition to total phosphorus, soil catalase activity had the significant or extremely significant correlation with soil physicochemical properties. The correlations between catalase activity with urease and sucrase activities were significantly negative. Soil catalase activity was the most significant between soil enzyme activities and soil physicochemical properties. The variation of soil enzyme activities in typical vegetation zones along an altitude gradient in Mao＇er Mountain showed a particular property, this result revealed the difference of soil enzyme activities, and spatial distribution in different elevations, meanwhile provided a theoretical basis for utilization and improvements of forest soil in Mao＇er mountains.