三角帆蚌对北京富营养化河湖水体的滤水效率和放养方式研究

2009年9月,在北京市水利科学研究所实验基地采用室内实验方式,研究了三角帆蚌在北京富营养化水体中的滤水效率,对比水体上层和底层2种放养方式对水体净化效果差异。结果表明:三角帆蚌平均滤水率为(31.63±6.67)mL/(min.kg);上层放养方式对水体透明度改善效果显著,叶绿素a在48 h即显著降低,且维持在较低水平。三角帆蚌有利于富营养化水体净化,实际应用中应采用水体上层放养方式。

Study on Hyriopsis cumingii＇s filtration rates and stocking mode in eutrophic water of Beijing

Hyriopsis cumingii’s filtration rates in eutrophic water were studied,and the difference of purifying effect was compared between upper and bottom stocking by laboratory experiments in Beijing Hydraulic Research Institute Experimental Center in September 2009.The results show that: Hyriopsis cumingii’s average filtration rates are(31.63±6.67)mL/(min·kg).The upper stocking has a great effect on the transparency of water column,and the content of chlorophyll-a reduced markedly after 48h,and then maintains at a lower level.The study suggests that Hyriopsis cumingii is beneficial to purify eutrophic water,and the upper stocking mode is recommended.