大型水生植物对骆马湖氮、磷元素的影响

Effect of macrophytes on nitrogen and phosphorus in Luoma Lake

对骆马湖有草区和无草区水体和沉积物中氮、磷元素含量分析,结果表明:无草区水体中总氮、总磷含量高于有草区;有草区表层沉积物总氮含量随时间变化明显,而无草区表层沉积物总氮含量随时间的变化很小;有草区与无草区表层沉积物中总磷含量的时间变化并无明显差异;有草区表层沉积物总氮含量基本上均高于无草区,而有草区表层沉积物总磷含量均要低于无草区。骆马湖有草区与无草区采样点沉积物碱性磷酸酶活性大小在58.41～315.07 mg/(kg.h)范围内变化,有草区的碱性磷酸酶的活性普遍低于无草区的碱性磷酸酶活性。在湖泊中种植大型水生植物确实可以减少水体污染,达到净化水质的目的。

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.