浮床水蕹菜对养殖水体中营养物的去除效果研究

摘要

为研究浮床水蕹菜对池塘养殖水质的改善效果,于2007年6月至11月,在6个2000m2的标准养殖池塘进行了中试研究.3个池塘放养常规鱼类和部分名优鱼类,并利用浮床技术在水面上种植200m2的水蕹菜(Ipomoea aquatica),另外3个池塘放养相同重量的常规鱼类作为对照塘.实验结果显示,种植塘的渔产量为1467kg,显著高于对照塘1203kg的渔产量(p<0.05).对照塘中TN去除率为25.17%,TP为15.27%;种植塘中TN去除率为30.02%,TP为21.68%;种植塘收获水蕹菜鲜重(4000±350)kg,TN去除率为8.41%,TP为4.85%.在养殖实验的中后期,种植塘水体的TN、TP、COD和Chla都显著低于对照塘,而透明度显著高于对照塘,溶解氧保持在5mg·L-1以上.这种综合养殖模式不仅能有效改善水质,减少养殖废水对环境的污染,还可提高养殖的经济效益.

To investigate the nutrient removal in an aquaponic system,pilot scale tests were carried out in six earthen ponds of area 2000 m2 from June to November in 2007.The aquatic vegetable Ipomoea aquatica(200 m2 area) was planted on floating beds in three ponds.The other three ponds without the vegetable were considered controls.The same fish weight was stocked in the planted and control ponds,but with different fish species.At the end of experiment,the fish production in planted ponds(1467 kg) was significantly...

关键词

浮床; 水蕹菜; 养殖废水; 营养去除

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浮床水蕹菜对养殖水体中营养物的去除效果研究.pdf