衡水湖常见挺水植物对氮、磷固定及腐烂影响因素研究

Study on the Effect of the Nitrogen and Phosphorus Fixation and the Factors of Decay of the Common Emergent Plants in Hengshui Lake

以衡水湖常见挺水植物芦苇(Phragmites australis)、香蒲(Typha orientalis Presl.)为对象,研究了其对氮、磷的固定,以及不同温度和不同腐烂时间对氮、磷释放的影响。结果表明:芦苇、香蒲对富营养化水体中的氮、磷具有很好的净化效果,且对氮的固定能力高于磷;芦苇、香蒲在腐烂前期释放氮、磷的强度最大,而后强度逐渐减小。温度较高时促进了芦苇、香蒲的腐烂分解以及对氮、磷的释放。因此,提出了为避免造成水体的二次污染,应在植物进入枯萎阶段前尽快收割。

Two common emerging plants which were called phragmites australis and typha orientalis presl. were used for research object. The study researched the fixation of nitrogen and phosphorus of phragmites australis and typha orientalis presl., and the effect of different temperature and different decay time on the release of nitrogen and phosphorus of phragmites australis and typha orientalis presl. The results showed that： phragmites australis and typha orientalis presl. had good purification effect on nitrogen and phosphorus in eutrophic water, and the fixed capacity of nitrogen was better than phosphorus; the release intensity of nitrogen and phosphorus of phragmites australis and typha orientalis presl. were maximum in the early stage of decay, and the intensity gradually decreased. High temperature promoted the decomposition of phragmites australis and typha orientalis presl. and the release of nitrogen and phosphorus. Therefore, in order to avoid secondary pollution of the water body, it should be harvested as soon as the plants enter the withering stage.