3种植物对人工模拟三峡库区富营养化水体的净化研究

Study on Purification the Simulated Eutrophied Water of Three Gorges Reservoir with Three Aquatic Plants

根据三峡库区水体氮、磷的富营养化情况,人工模拟三峡库区水生生态系统,栽植鸢尾、菖蒲和石菖蒲3种水生植物,开展利用水生植物净化三峡库区水质的研究.结果表明:(1)水生植物的存在对调节水体的pH值有一定作用;(2)人工种植适合于库区湿地生态系统生长的植物,对库区污染水体中的氮、磷有很好的去除效果,但不同植物的去除率有所不同;(3)3种水生植物对氮、磷的去除能力不同.对TN和NO3--N的去除率高低排序为菖蒲,鸢尾,石菖蒲;对NH4+-N和TP的去除率高低排序为菖蒲,石菖蒲,鸢尾.初步认为三峡库区以种植菖蒲较好.

Based on the eutrophication situation of nitrogen and phosphorus in the Three-Gorges Reservoir area,Iris tectorum Maxim.,Acorus calamus L.and A.graminneus L.were planted in a simulated aquatic ecosystem of this area to study the feasibility of purification of the water of the Three-Gorges Reservoir with the above-mentioned 3 aquatic plants.The presence of aquatic plants was shown to have a certain effect of regulating the pH of the water bodies.Planting appropriate hydrophytes in the wetland system of Three Gorges Reservoir area had a satisfactory removal effect for the nitrogen and phosphorus in the polluted reservoir water body,though the removal rates of nitrogen or phosphorus varied with different hydrophytes.The capacity of removal of nitrogen or phosphorus differed with different aquatic plants.The removal rate of TN and NO-3-N was in the order of A.calamus L. I.tectorum Maxim. A.graminneus L.,while the removal rate of NH＋4＋-N and TP followed the order of A.calamus L. A.graminneus L. I.tectorum Maxim.Our preliminary conclusion is that planting A.calamus L.in Three-Gorges Reservoir area is the first choice for polluted water purification.