江苏农业学报2025，Vol.41Issue(3)：526-536,11.DOI:10.3969/j.issn.1000-4440.2025.03.012
不同强化处理措施生态沟渠的净化效果对比分析
Comparative analysis of purification effect of ecological ditches with differ-ent enhanced treatment measures
摘要
Abstract
The purpose of this research was to study the purification effect of different enhanced ecological ditches on the main pollutants in farmland drainage water under rainfall condition.Three ditches with the same specifications in the experimental base of Jiangsu Academy of Agricultural Sciences were used to plant aquatic plants Acorus gramineus and Val-lisneria natans along the way,and ecological filling boxes and ecological filter dams were added to construct ecological ditches.According to the different strengthening treatment measures,the ecological ditches were set as fol-lows:D1,one packing box and one filter dam;D2,two packing boxes and two filter dams;D3,three packing bo-xes and three dams.Corresponding to different rainfall in-tensities,three kinds of channel inflow rates namely mod-erate rain,heavy rain and rainstorm were set up.Under the condition of dynamic continuous water inflow,the purification effects of different enhanced ecological ditches on total ni-trogen,total phosphorus,chemical oxygen demand and NH+4-N in farmland drainage water were analyzed.The results showed that under the same experimental conditions,the purification effect of ecological ditch under low flow rate(0.7 m3/h)was the best.Comprehensive evaluation and analysis of relevant indicators showed that D3 had the best purification effect.In this experiment,the interception and purification effect of the ecological ditch was relatively better when the rain-fall intensity was moderate.When the rainfall intensity was heavy to stormy,the enhanced treatment D3 could be selected,and high-efficiency adsorbent fillers could be added to the filter dam of the ecological ditch,or enhanced purification facili-ties could be added to the pond which received the ditch outflow.In this study,the biomass of the experimental plant Acorus gramineus and its absorption of nitrogen and phosphorus were both significantly higher than those of Vallisneria natans.关键词
生态沟渠/农田退水/削减率/氮/磷Key words
ecological ditch/drainage of farmland/reduction rate/nitrogen/phosphorous分类
资源环境引用本文复制引用
李敏,张迎颖,王岩,张志勇,苏国东,刘海琴,宋雪飞,姜智绘..不同强化处理措施生态沟渠的净化效果对比分析[J].江苏农业学报,2025,41(3):526-536,11.基金项目
江苏省重点研发计划项目(D21YFD17008) （D21YFD17008）
国家重点研发计划项目(2021YFD1700805-02) （2021YFD1700805-02）
江苏省农业科技自主创新基金项目[CX(22)3200] （22）
国家重大科技专项水体污染控制与治理专项(2017ZX07202004-07) （2017ZX07202004-07）
