摘要
实验以白洋淀为研究对象,利用水生植物荷花和菱角削减白洋淀水体中的营养盐。研究表明:7月下旬,菱角外围区水体中TP的含量是0.04 mg/L,去除率是55.6%。8月下旬,荷花外围区NH4+-N含量是0.22 mg/L,去除率为37.1%。9月中旬,荷花种植区水体透明度最高,最高可达0.85 m。9月下旬,荷花外围区TN的含量下降非常明显,可降低到0.58 mg/L,去除率达到89.5%。10月中旬,荷花外围区和菱角外围区对于TP的去除率分别是93.0%、88.4%。菱角种植区对于KTN的去除率是45.2%。荷花、菱角的种植对于底泥中氮、磷的削减有一定的效果。
Aquatic plants（Lotus and water caltrop） were used to reduce nutrient in Baiyangdian Lake.The results showed that the content of TP is 0.04 mg/L and the removal rate was 55.6% in late July in water caltrop periphery area.The content of NH＋4-N was 0.22 mg/L and the removal rate was 37.1% in late August in water caltrop periphery area.The SD was the highest（0.85 m） in the middle of September in lotus center area.The content of TN reduces to 0.58 mg/L and the removal rate was 89.5% in late September in lotus periphery area.The removal rates of TP in lotus periphery area and water caltrop periphery area were 93.0% and 88.4%,respectively,in middle of October.The removal rate of KTN was 45.2% in middle of October in water caltrop center area.Lotus and water caltrop had certain effect in removing sediment of nitrogen and phosphorus.
出处
《节水灌溉》
北大核心
2011年第4期40-43,共4页
Water Saving Irrigation
基金
国家水体污染控制与治理科技重大专项(2008ZX07209-007)
关键词
荷花
菱角
氮磷
底泥
lotus
water caltrop
nitrogen and phosphorus
sediment
