摘要
为研究沟渠拦截氮磷的效果,在不同时间对沟渠不同断面水体进行了监测。结果显示,河水自然净化和水生植物拦截净化作用,都会降低沟渠水中的氮磷含量,并且全氮、全磷含量的降低幅度一般要高于铵态氮、硝态氮以及可溶磷的变化幅度;相对河水自然净化而言,水生植物拦截净化能力明显更强,几种形态养分含量的降低幅度在5.7%～32.9%之间,明显高于降低幅度在0.30%～6.6%之间的河水自然净化。结果还显示,在降雨结束以后,沟渠水中全氮、铵态氮含量都呈现先增加后降低的变化趋势,全磷、可溶磷、硝态氮含量总体呈现波动渐增的变化趋势。
Ditch water of different sections was monitored at different times to study the ecological effectiveness of ditch.The results showed that ditch and aquatic plant had function of interception and purification water.Nitrogen and phosphorus concentration of water decreased when water flow through the ditch.Generally reduction range of total nitrogen and total phosphorus was higher than that of ammonium,nitrate and soluble phosphorus.The purification capacity of eco-ditch （with aquatic plant） was significantly stronger than that of natural ditch（without aquatic plant）.The declined ratio of nitrogen and phosphorus in eco-ditch was 5.7%～32.9%,while in natural ditch was only 0.30%～6.6%.The results also show that after rains the content of total nitrogen and ammonium nitrogen in ditch water had the trend of increasing firstly and then declining,while the content of total phosphorus,soluble phosphorus,and nitrate nitrogen had the trend of fluctuated incremental.
出处
《水土保持学报》
CSCD
北大核心
2010年第2期141-145,共5页
Journal of Soil and Water Conservation
基金
国家科技部科技支撑计划项目(2007BAD87B06)
安徽省第二批115创新团队项目(巢湖流域农业面源污染防治技术研发团队)
安徽农业大学稳定和引进人才科研资助项目(2009-2010年)
国家水污染控制与治理科技重大专项(2009ZX07103-002)
关键词
沟渠
生态拦截
氮磷
ditches
ecological interception
nitrogen and phosphorus
