盐度、水位双重波动对芦苇去除水中氮磷的影响
EffectoffluctuationsofbothwaterlevelandsalinityonremovalofnitrogenandphosphorusbyReed
-
摘要: 芦苇广泛分布于我国西北干旱、半干旱区,具有净化水体氮磷的作用。目前盐度和水位双重波动作用影响芦苇的研究较少,因此本实验设置不同的盐度和水位波动组合,分析其对水体氮磷去除的联合影响。结果表明:低频盐度上升(3天0.1g/L)有利于水体中总氮、总磷和氨氮的去除,而高频盐度上升(3天0.2g/L)不利于其去除。水位下降利于水体中总氮和氨氮的去除,水位上升则起到抑制作用。水位和盐度单因素波动未对芦苇生长及氮磷吸收产生负面影响,高频水位上升及盐度下降更有利于芦苇生物量累积,水位与盐度下降有利于芦苇根系生长。水位和盐度双重波动直接影响芦苇生长,间接影响水体氮磷去除。本文结果可为我国西北干旱半干旱区河湖补水方案制定提供参考。Abstract: Reed widely grows in the arid and semi-arid regions in northwest China, which can purify nitrogen and phosphorus in water bodies. At present, there are few studies on the influence of both fluctuations of salinity and water level on the reed, so different combinations of salinity and water level fluctuations were set up to analyze their joint effects on nitrogen and phosphorus removal in water bodies. The results showed that low frequency increase of salinity (0.1g/L per 3 days) was beneficial to the removal of total nitrogen, total phosphorus and ammonia nitrogen, while high frequency increase of salinity (0.2g/L per 3 days) was unfavorable to them. The decline of water level is conducive to the removal of total nitrogen and ammonia nitrogen, the rise of water level plays a restraining role. The individual fluctuation of water level or salinity did not have a negative impact on the reed growth and its absorption of nitrogen and phosphorus. High frequent rise of water level and decline of salinity are more conducive to the accumulation of reed biomass, while both the decline of water level and salinity are conducive to the growth of reed roots. The dual fluctuations of water level and salinity directly affects the growth of reed, and indirectly affects the removal of nitrogen and phosphorus in water. The results may provide a reference for the formulation of water supplement schemes for rivers and lakes in arid and semi-arid regions in northwest China.
-
Key words:
- Reed /
- Salinity /
- Water level /
- Dual influence /
- Nitrogen and phosphorus removal
-

计量
- 文章访问数: 43
- HTML全文浏览量: 1
- PDF下载量: 6
- 被引次数: 0