不同土壤-南天竹系统的土壤酶活性分异

石灰岩退化生态系统的恢复离不开土壤基质的改善。采用盆栽法,研究了生长在黑色石灰土、紫色土、黄壤3种不同土壤类型中的南天竹土壤酶活性的情况。试验表明:淀粉酶、碱性磷酸酶、天门冬酰胺酶的活性均表现出黑色石灰土>紫色土>黄壤,三者之间差异显著(p<0.05)。而脲酶、多酚氧化酶和过氧化物酶活性则是紫色土>黑色石灰土>黄壤,三者之间差异也达到显著水平(p<0.05)。土壤理化性质与土壤酶活性的相关分析说明土壤pH和全磷(P)对土壤酶的活性影响不大,而不同土壤类型中的全氮(N)和土壤含水率与部分土壤酶活性呈显著相关。不同土壤类型的土壤酶相关性表现各异。

Differentiation of Soil Enzyme Activities in Different Soil-Heavenly Bamboo Systems

The restoration of limestone-degraded ecosystem may improve soil substrate.Heavenly bamboo was planted to pots in three different soil types(black limestone soil,yellow soil,purple soil) in order to do research on the soil enzyme activities.The results show the activities of amylase,alkaline phosphatase,and asparaginases in black limestone soil are higher than the other two soil types.But the activities of urease,peroxidase and polyphenol oxidase in purple soil are higher than that in the other two soil types.All the differences among them are significant(p<0.05).The correlation among soil enzyme(acti-)(vities),soil phosphorus and pH are not significant,while the correlation among some soil enzyme(acti-)(vities),soil nitrogen and moisture content in different soil types are significant(p<0.05).Different soil types show different correlation.Different soil enzymes show different correlation,too.The results can give some advices on the restoration of limestone-degraded ecosystem.