石佛寺人工湿地不同水生植物区域磷的沉积特征分析

为分析石佛寺人工湿地不同水生植物区域磷的沉积特征,研究了石佛寺水库人工湿地4种不同水生植物(荷花、蒲草、芦苇、沉水及浮叶植物的混合区域)和空白区域底泥中磷沉积变化规律及其成因。结果表明,水生植物可有效抑制底泥沉积物中磷元素的释放,且不同植物区域磷的沉积特征不同,其中芦苇区域底泥中磷含量最高,抑制底泥磷释放能力较强,蒲草区域底泥中磷的含量最低,抑制底泥中磷释放能力较弱,而无植物的空白区域对底泥中磷的沉积特性无明显影响;不同温度对底泥中磷的沉积有一定的影响,当温度较高时,底泥中磷含量会有所增高;当冬季水生植物开始死亡腐解后,有水生植物种植的区域底泥中磷含量会有明显提升。

Phosphorus Sedimentary Characteristics of Different Aquatic Plants Area in Shifosi Artificial Wetland

In order to analyze the phosphorus sedimentary characteristics of different aquatic plants in Shifosi artificial wetland, this paper studies the changes and causes of phosphorus deposition of four different aquatic plants(lotus, cattail, reed and a mixed area of submerged, floating foliage plants) in the artificial wetland of Shifosi Reservoir and sediment in blank area. The results show that the aquatic plants can effectively inhibit sediment phosphorus release, and phosphorus sedimentary characteristics of different plant area is somewhat different. The content of phosphorus in deposit is the highest and the ability of phosphorus release in deposit is stronger. The content of phosphorus in deposit of cattail area is the lowest and the ability of phosphorus release is the weakest. The area of non-aquatic plants has no obvious influence on the phosphorus deposition in the sediment. Different temperatures have certain impacts on phosphorus deposition in the deposit. The content of phosphorus in the deposit will increase at high temperatures. When aquatic plants begin to decay in winter, the content of phosphorus in the deposit of the 4 aquatic plants will increase.