不同植被恢复模式下土壤微生物及酶活性的比较——以嘉陵江上游地区为例

研究了嘉陵江上游退耕还林区内5种植被恢复模式下土壤微生物、土壤酶活性以及理化性质。结果表明：①5种植被恢复模式土壤微生物数量、酶活性以及有机质、全氮含量等均明显高于无植被对照；②不同植被恢复模式土壤微生物总数：火烧迹地灌丛﹥刺槐林﹥湿地松×刺槐混交林﹥青冈林﹥湿地松﹥对照地；③不同植被恢复模式下土壤酶活性不同，表层土壤脲酶活性：火烧迹地灌丛﹥青冈林﹥刺槐林﹥湿地松﹥混交林﹥对照地，蔗糖酶（转化酶）：火烧迹地灌丛﹥湿地松﹥青冈林﹥刺槐林﹥混交林﹥对照地，过氧化氢酶活性各林分间变化不明显。

COMPARISON OF SOIL MICROORGANISM AND ENZYME ACTIVITY IN DIFFERENT PATTERNS OF VEGETATION REHABILITATION--AN EXAMPLE FROM UPPER REACHES OF JIALINGJIANG RIVER

The physical and chemical properties, soil microorganisms and enzyme activities in five patterns of vegetation rehabilitation were studied. The soil microorganisms, enzyme activities and the content of organic matter and total N of five patterns increased evidently than in control site. The amount of total microorganism rankedas burned shrub﹥Robinia pseudoacacia ﹥mixed stands of Pinus elliottii and Robinia pseudoacacia﹥Cyclobalanopsis glauca﹥Pinus elliottii﹥control site. The enzyme activity was different in five patterns. The content of urease in the surface layer soil ranged as burned shrub﹥Cyclobalanopsis glauca﹥Robinia pseudoacacia ﹥Pinus elliottii﹥mixed stands of Pinus elliottii and Robinia pseudoacacia﹥control site,and the invertase as burned shrub﹥Pinus elliottii﹥Cyclobalanopsis glauca﹥Robinia pseudoacacia ﹥mixed stands of Pinus elliottii and Robinia pseudoacacia﹥control site.The diversity of catalase is not significantly different in five patterns.