Effect of macrophytes on nitrogen and phosphorus in Luoma Lake
大型水生植物对骆马湖氮、磷元素的影响

The nitrogen and phosphorus contents in the water and sediment with and without macrophytes in Luoma Lake were analyzed.The results indicate that the concentrations of TN and TP in water without macrophytes are higher than that with macrophytes.TN in the surface layer of sediment with macrophytes changes significantly with time,while without macrophytes is opposite.The change of TP with and without macrophytes with time does not have significant difference.TN is basically higher with macrophytes than that without macrophytes,while TP is lower.Alkaline phosphatase activity in the surface layer of sediment changes between 58.41~315.07 mg/(kg·h),and is lower with macrophytes than that without macrophytes.Plant macrophytes in lakes can indeed reduce pollution,and achieve the purpose of purifying water quality.