泉州湾河口湿地土壤脲酶和磷酸酶活性研究

本文对泉州湾河口湿地不同区域(上游、中游和下游)、不同红树植被下土壤脲酶和磷酸酶活性在不同季节的变化规律进行了研究。结果表明:土壤脲酶和磷酸酶活性存在极显著的相关性;两种酶在不同区域间均无显著差异,季节变化均表现为春季大于秋季;有红树植被的土壤脲酶和磷酸酶活性皆大于空地和裸地,土壤脲酶不同红树植被下无显著差异,磷酸酶则表现为百年生桐花树和互花米草显著高于其余植被,秋茄和白骨壤次之。随着土壤垂直深度的增加,脲酶和磷酸酶活性整体上表现为逐渐降低的趋势,湿地土壤脲酶和磷酸酶活性受植被类型和根系生长状况显著影响。以上结果为泉州湾河口湿地的生态修复与环境保护提供了一定的理论依据。

Soil Urease and Phosphatase Activities at Quanzhou Bay Estuarine Wetland

The seasonal urease and phosphatase activities in the soil under different mangrove plants and upon different plots (upstream,midstream and downstream)at Quanzhou Bay estuarine wetland were studied.The main results were as follows:There was significant correlation between the soil urease and phosphatase activities,which showed no significant difference upon different plots.The urease and phosphatase activities in the soil were higher in spring than autumn,which under mangrove plants were all higher than those in the New alluvial soil without plants and Bared land.Soil uresse activity exhibited no significant difference under different mangrove species.The phosphatase activity in the soil of Centenary Aegiceras corniculatum(CA) and Spartina alterniflor(Sa)was the highest,which was the higher in the soil of Kandelia candel(Kc)and Avicennia marine (Am).The two soil enzyme activities generally decreased with increasing soil depth,and those in the soil at Quanzhou Bay estuarine wetland were closed relation to the plant species and root distribution.of the mangrove forest.These findings offered a theoretical foundation for the environmental protection and ecological restoration of Quanzhou Bay estuarine wetland.