【摘要】 利用黑麦草水培技术,研究粪污滤液低、中、高、超高4种施用量和1次、4次两种施用次数对黑麦草产量及黑麦草水培净化系统(RHS)N、P净化效率的影响.结果表明,黑麦草生物量以中施用量处理最高,RHS的N、P去除量则随施用量的增加而增加,但在超高施用量处理下,水质下降.黑麦草N、P吸收量在中、高和超高处理下差异不显著(黑麦草N、P最大吸收量分别为13.6g.m-2和3.17g.m-2).随施用量增加,通过黑麦草吸收去除的N、P比例下降.总负荷相同的情况下,施用次数增加有利于提高黑麦草产量和RHS的N、P净化效率.粪污滤液施用量与施用次数对黑麦草产量和RHS的N、P净化效率具有显著影响.选择适宜的施用量和施用次数是提高RHS净化效率和生产效率的关键.更多还原

【Abstract】 With hydroponic method,this paper studied the ryegrass Lolium multiflorum growth and its N and P removal under the application of septage filtrate.The results showed that a medium application rate of septage filtrate gave the highest yield of L.multiflorum.The N and P removal in the ryegrass hydroponic system was increased with increasing application rate of septage filtrate,but the water quality was declined when super high volume of septage filtrate was added.The N and P uptake by L.multiflorum had no significant difference under medium,high,and super high application rate of septage filtrate,with the maximum uptake of N and P being 13.6 g·m-2 and 3.17 g·m-2,respectively.The removed proportion of N and P through ryegrass uptake declined with increasing septage filtrate application rate.Under the same total load,increasing the application frequency of septage filtrate could improve ryegrass yield,water quality,and nutrients removal.To select an appropriate application rate and frequency of septage filtrate was the key in improving the nutrients removal efficiency of ryegrass hydroponic system.更多还原