木本植物作为人工湿地植物的可行性试验

景观水体的一个主要问题是水体富营养化将导致水华的暴发,并导致水体透明度下降,溶解氧降低,水生植物和鱼类大量死亡。为了防止水华爆发,人工湿地技术常被应用于景观水体水质维护之中,但其存在运行操作费用不足而导致的传统湿地植物到了秋季无人收割,和植物吸收营养盐总量较小等问题。因此,该课题通过中试研究,进行某良种柳树(S.matsudana Koidz)和黄花鸢尾(Iris wilsonii)的对比试验,并结合前人的研究成果,得出的结论为:该柳树的茎叶部一年中可去除氮的总量为10.8 g/m2,去除磷的总量为1.89 g/m2,在去除总量上比传统湿地植物具有明显优势,并且收割下来的柳树可作为生物质能源或造纸原料,能部分弥补湿地的运行费用,是一种很有潜力的湿地植物。未来,从保障湿地的运行效果和解决运行费用的角度来讲,具有经济价值的木本植物是湿地研究的一个方向。

Feasibility Experiments in Application of Woody Plants as Constructed Wetland Plants

Water-bloom is easy to break out in scenic water which utilizes reclaimed water as source water. Constructed wetland is a common bioremediation technology for reclaimed water reuse in landscape. There were some disadvantages in constructed wetland, such as plants weren＇t harvested caused by insufficient operating cost, and amount of nutrients absorbed by plants was small. Pilot test was carried out in the hybrid willow （S.matsudana Koidz） and yellow iris （Iris wilsonii） in R＆D center in Beijing Drainage Group. Combined with previous researches, the results show that： hybrid willow （S.matsudana Koidz） grew well in constructed wetland; re- moved total of nitrogen is 10.8 g/m2, of phosphorus is 1.89 g/m2. This effect is better than traditional wetland plants. Therefore, hybrid willow is an excellent wetland plant. In the future, aim to upgrading wetlands effectiveness and reducing operating costs, woody plants with economic value is a research direction in constructed wetland.