植物投放密度对富营养化湖水修复效率的影响

目的]研究几种植物混种对富营养化水体的净化效果。方法]以小瓜子、缎带椒、中柳、皇冠和西瓜草5种植物为试材，以北京市延庆县妫水湖8月份富营养化程度最高的湖水为植物生长基质，设高、中、低3个投放密度试验组，研究植物投放密度对富营养化湖水的修复效率影响；通过测定水样中总磷酸盐（TP）、总氮（TN）、氨氮和硝态氮的浓度变化，确定植物修复的最佳效率。结果]所有植物试验组对富营养化水中氨氮的净化效果均比较显著。3个试验组中，以投放低密度试验组对氨氮吸收的处理效果比较好，对硝氮吸收的处理效果较为明显；投放中密度试验组对于总氮和磷酸盐吸收的处理效果较为明显。结论]适当控制植物的投放密度有利于去除富营养化物质。

Impact of Input Density of Aquatic Plants on the Remediation Efficiency of Eutrophic Lake Water

Objective] The purpose was to research the purifying efficiency of mixed planting of some plants on the eutrophic lake water.Method] With 5 plants including Lindernia rotundifolia,Cryptocoryne crispatula,Hygrophila stricta,Microrium sp.and Peperomia sandersii as the tested materials and the highest eutrophic lake water from Guishui Lake in Yanqing County in Beijing City as the matrix of plant growth,3 test groups with high,middle and low input density were set up to study the effect of input density of aq...