【摘要】 湿地水环境恶化,有研究表明水生植物能够有效吸收水中的有机质、氮等营养物质。本文是以水生植物对底泥中有机质、氮含量的变化影响进行分析,为改善湿地水环境提供依据。以石佛寺湿地作为研究对象,将石佛寺湿地分为5个研究区(芦苇区、荷花区、蒲草区、沉水植物与浮叶植物的混合区、空白对照区),在5个研究区选取5个采样点,对5个采样点的底泥进行1年的采样(除去1,2月),测得有机质(OM)、氮(TN)的含量,通过OM、TN含量的变化,分析水生植物对底泥中OM、TN含量的影响。温度、降雨量、微生物、水流方向等因素都对底泥中OM、TN含量的变化产生影响,结果表明OM、TN含量的变化大多是由水生植物的生长消耗与微生物对植物死体的分解影响,5个研究区中芦苇区、荷花区的有机质、氮含量较高,蒲草区、混合区相对较少,高于空白区,不同的水生植物对有机质、氮含量有不同的影响。更多还原

【Abstract】 The wetland water environment has been deteriorating. Some studies have shown that aquatic plants can effectively absorb organic matter,nitrogen and other nutrients in water. This paper analyzes the effects of aquatic plants on the changes of organic matter and nitrogen in sediments,and provides the basis for improving wetland water environment. In this paper,Shifu Temple wetland is divided into five research areas( Reed area,lotus area,Pucao area,mixed area of submerged macrophytes and chlorophyll plant,blank control area),and the sediment of the 5 sampling points are sampled for 1 year( excluding 1,2 months). Then,the contents of organic matter( OM) and nitrogen( TN) are measured. The effects of aquatic plants on OM and TN contents in sediment are analyzed from the changes of OM and TN contents. Temperature,rainfall,microbial,flow direction and other factors also have impact on OM,TN content changes in the sediment.The results show that the changes of OM and TN contents are mostly affected by the growth and consumption of aquatic plants and microbial decomposition of plant dead bodies. Among the five study areas,the organic matter and nitrogen content in the reed area and lotus area are the highest,followed by Pucao area,mixed area,the blank area in sequence. Different aquatic plants have different effects on organic matter and nitrogen content.更多还原