摘要
分析了农田生态沟渠和自然沟渠水体中氨态氮、硝态氮、总氮、溶解性总磷和总磷浓度沿程变化以及生态沟渠对氮、磷的截留效应。设置盘培多花黑麦草的生态沟渠与自然沟渠相比,对水稻田面源污染物中的氨态氮、硝态氮、总氮和总磷都有着较强的降解能力。靠近水稻田排水口处的300m生态沟渠内,各种污染物指标的降解幅度较大,而远离水稻田排水口处的300m生态沟渠内,各种污染物指标的沿程降解变化相对较平缓。
The author analyzed the changes of the contents of ammonic nitrogen,nitrate,total nitrogen,dissolved total phosphorus and total phosphorus in the water body along natural ditch and ecological ditch which was mainly composed of Lolium multiflorum stripes,and studied the retention and removal effects of ecological ditch on nitrogen and phosphorus.The ecological ditch had stronger ability to degrade ammonic nitrogen,nitrate,total nitrogen and total phosphorus in non-point source pollutants in rice field than the natural ditch.In the ecological ditch with the length of 600 m,the velocity of degrading pollutants near the entrance of rice filed was greater than that far away from the entrance.
出处
《江西农业学报》
CAS
2010年第7期121-124,共4页
Acta Agriculturae Jiangxi
基金
浙江省水利厅科技专项资助项目(RCO910)
关键词
生态沟渠
农业面源污染
多花黑麦草
降解
水稻田
灌溉
Ecological ditch
Agricultural non-point source pollution
Lolium multiflorum
Degradation
Rice field
Irrigation
