浮床栽培绿叶蔬菜对富营养化水体的净化效果

用生菜和苋菜作为泡沫板浮床栽培材料,研究了其生长状况及对富营养化水体的净化效果。结果表明,生菜和苋菜在富营养化水体中可以正常生长。生菜28d内对富营养化水体中的TN、NH4＋-N、NO3--N、TP、PO43--P的去除率分别达到69.83%、85.41%、59.57%、76.58%和82.16%,苋菜28 d内对TN、NH4＋-N、NO3--N、TP、PO43--P的去除率分别为74.91%、89.58%、54.60%、78.53%和84.71%。生菜和苋菜能显著改善富营养化水体的水质,并且没有产生亚硝酸盐及重金属富集,符合食用标准。

Purification Effect of Cultivating Green Leaf Vegetable on Floating-beds on Eutrophic Water Body

With Lactuca and Amaranthus as the planting stuff on floating-beds,the studies on their growth status and the purification effect on the eutrophic water indicated that Lactuca and Amaranthus could grow in the eutrophic water normally.The removal rate of TN,NH4+-N,NO3——N,TP and PO43——P respectively reached 69.83 %,85.41 %,59.57 %,76.58 % and 82.16 % by lactuca during 28 d growth and the removal rate of TN,NH4+-N,NO3——N,TP and PO43——P respectively reached 74.91 %,89.58 %,54.60 %,78.53 % and 84.71 % by amaranthus during 28 d growth.It was proved that lactuca and amaranthus had a significant effect on improving the quality of the eutrophic water,without producing nutrition enrichment,so lactuca and amaranthus were edible according to food standard.