中文摘要：

在滇池草海的封闭水域东风坝和老干鱼塘开展修复富营养化水体的试验性工程示范。定期监测水葫芦（Eichhornia crassipes）生长规律，富集氮、磷能力，以及2个水域水葫芦种养后水质的周年动态变化。结果表明，2个水域水葫芦最大生长速率均出现在7月，生长速率分别为759.3和601.6 g·m-2·d-1，12月基本停止生长，东风坝和老干鱼塘水域新鲜水葫芦对氮、磷的富集量分别为1.95、0.17和1.74、0.14 kg·t-1，水体营养化程度直接影响水葫芦生长特征。规模化控养水葫芦明显提高水体透明度，降低水体溶解氧浓度和pH，但既未影响鱼类生长，又有利于水葫芦的生长与繁殖。在水葫芦种苗初始投放覆盖度〈10%、投苗量为22.5 t·hm-2条件下，水葫芦种养后（7—12月）东风坝水体TN、TP和NH4＋-N平均浓度比种养前分别下降7.79、0.67和0.91 mg·L-1，老干鱼塘水体TN、TP和NH4＋-N平均浓度比种养前分别下降1.03、0.08和0.09 mg·L-1；水葫芦被机械化打捞后，2处水域水体TN和TP浓度并未出现明显回升，水质变化较平稳，表明规模化控养水葫芦修复封闭的富营养化水域水质效果明显。

英文摘要：

An experimental engineering demonstration project of remedying eutrophicated waters through large scale confined growth of water hyacinth was carried out in Dongfeng Ba and Laogan Yutang, two tracts of relatively enclosed waters in Caohai of Lake Dianchi. In line with the project, growth and variation of nitrogen and phosphorus accumulation capacity of water hyacinth was monitored regularly and dynamic changes in water quality of the two tracts of waters were measured in the year after the water hyacinth was planted. Results show that growth rate of the water hyacinth in both tracts of waters peaked up to 759.3 and 601 g·m-2·d-1, in July and dropped almost to zero in December. The plants accumulated nitrogen and phosphorus from the water, reaching 1.95 and 0.17 kg·t-1, respectively, in Dongfeng Ba and 1.74 and 0.14 kg·t-1, respectively, in Laogan Yutang. Eutrophication degree of the water body was found to have a direct relationship with growth of the plants. Cultivation of water hyacinth in such a way obviously improved transparency of the water body, lowered the concentration of dissolved oxygen and pH in the water, which had no adverse effect on growth of the fish in the water, but beneficial effect on growth and propagation of water hyacinth. At the beginning of the project, waater hyacinth seedlings were released at a rate of 22.5 t·hm-2, and their coverage of water surface was less than 10%. After 6 months （July to December） of cultivation, water hyacinth lowered the mean concentration of TN, TP and NH4＋-N by 7.79, 0.67 and 0.91mg·L-1, respectively, in Dongfeng Ba and by 1.03, 0.08 and 0.09 mg·L-1, respectively. in Laogan Yutang. The concentrations of TN and TP in the two water bodies did not show any rising trend and water quality varied smoothly after water hyacinth was harvested mechanically, indicating that the effect of large scale confined growth of water hyacinth remedying eutrophicated water is very effective.