【摘要】 为富营养化水体的治理提供理论依据,采用室内静态试验,研究菹草(Potamogeton crispus)、苦草(Vallisneria spiralis)和轮叶黑藻(Hydrilla vertillata)3种沉水植物夏秋两季对水体中氮磷的去除效果及动态规律。结果表明:1)3种沉水植物对水体中总氮的去除效果秋季好于夏季,菹草的去除效果最好。2)3种沉水植物对水体中总磷的去除效果夏季好于秋季,轮叶黑藻的去除效果最好。3)植物正常生长能增加水体溶解氧浓度,植物腐败死亡会导致水中溶解氧迅速降低。4)植物的腐败死亡对水体中总氮含量影响不大,对总磷含量的影响大。5)总磷的去除率与水温显著相关。更多还原

【Abstract】 An indoor static test was conducted to investigate the effect of nitrogen and phosphorus removed by three species of submerged hydrophytes in different seasons.The results revealed that: 1) The total nitrogen removal efficiency of submerged hydrophytes in summer was better than in autumn.Potamogeton crispus showed the best effect for nitrogen removal.2) The total phosphorus removal efficiency of submerged hydrophytes in summer was better than in autumn,Hydrilla vertillata showed the best effect for total phosphorus removal.3) The concentration of DO would increase if the submerged hydrophytes grew well,but the death and decomposing of plant would cause it reduced quickly in water.4) The death and decomposing of plant could significantly affect the total phosphorus concentration in water,but indistinctively affect total nitrogen concentration.5) There was significant correlation between the total phosphorus removal rate and water temperature.更多还原