摘要
试验通过土柱模拟试验,采用试验中水进行灌溉3种不同的土柱栽植绿地植物,收集土柱60 cm处渗透液来分析灌溉前后水质的变化,可以看出,中水灌溉前后,水质中pH值、余氯、总氮、总磷、细菌总数和粪大肠杆菌总数都有不同程度的增大,且差异达到了显著水平(P<0.05);氯化物、BOD5、CODcr、粪大肠杆菌总数在中水灌溉后也呈增大趋势,而在清水灌溉后呈减小趋势。由此表明,中水绿地灌溉后,虽经过土壤胶体的吸附及截留、植物根系的吸收利用,但还是会使一些离子冗余进入地下水中,其量的大小很大程度上决定于灌溉中水水质指标。
Through soil column simulation experiment,in which three kinds of soil column planting greenbelt plants were irrigated with reclaimed water,and collecting the penetrating fluid at 60cm depth of soil column,the variation of water quality before and after reclaimed water irrigation was analyzed.The results showed that after reclaimed water irrigation,the pH value,residual chlorine,total nitrogen,total phosphorus,bacteria and total fecal coliform in penetrating fluid all increased at different extent,and there were significant differences（P0.05）.The Chloride,BOD5,CODcr,total fecal coliform in penetrating fluid also had a increasing trend after reclaimed water irrigation,while had a decreasing trend after clean water irrigation.So,after reclaimed water irrigation,though through soil colloid intercepting,absorbing and utilizing by plant roots,some ion redundancy still entered into groundwater and the quantity was largely determined by the index of reclaimed water quality.
出处
《节水灌溉》
北大核心
2011年第7期7-10,共4页
Water Saving Irrigation
关键词
中水灌溉
地下水
土柱模拟
reclaimed water irrigation
groundwater
soil column simulation
