香蒲对水体的净化效应

Purifying Effect of Water Body by Typha angustifolia

为了研究香蒲对水体的净化效应,为衡水湖的治理提供科学的理论根据。于2005年不同时间对大量生长香蒲区和无香蒲区的水样进行NH4+-N、NO2--N、总磷和水硬度的测定,通过时空水质分析研究了香蒲对水体的净化效应。香蒲对NH4+-N有明显的吸收作用,且不同生长阶段对NH4+-N的影响不同,营养生长旺盛阶段对NH4+-N的影响最大,但在高温季节大量香蒲残体分解已使湖水严重污染;香蒲对NO2--N无吸收作用,对衡水湖的影响是间接的;香蒲对总磷有明显的吸收作用,对水硬度没有明显的影响。香蒲的生长对氮、磷有吸收作用,其营养生长旺盛时期效果更加明显。香蒲有利于富营养化水体的净化。

Two kinds of water samples respectively collected from areas growing bulrushes and without bulrushes in different hours were analysed to compare NH4^ ＋ nitrogen,NO2^- nitrogen,phosphorous and hardness, The result showed that bulrushes could absorb NH4^ ＋ nitrogen apparently, besides, the different stages of bulrushe growth had different influence on NH4^ ＋ . The bulrushes had the maximum influence on NH4^ ＋ nitrogen when they grew bloomingly with enough nutrition. However, in season with high temperature, the remains of bulrushe decomposition would cause the pollution of Hengshui lake. Aecording to the research, the bulrushes had much more good influence on Hengshui lake indirectly. The bulrushes had ,similar influence on Hengshi lake. And they had no influence on the hardness of water.