摘要
为了研究不同灌溉模式下稻田水分利用及氮磷流失规律,以合理集成节水灌溉与减污技术,实现高产、节水、减污三者相统一,在平湖市农业排灌技术示范基地开展小区实验。试验设定常规灌溉、薄露灌溉、改进蓄雨薄露灌溉和沟畦适雨灌溉4种灌溉模式,测定田间灌排水量及排水与渗漏水中TN、TP、NH4+-N、NO3--N和COD等指标。结果表明:薄露灌溉、改进蓄雨薄露灌溉和沟畦适雨灌溉的灌水量分别比常规灌溉减少38.6%、73.4%、91.4%,沟畦适雨灌溉节水效果最好。相对于常规灌溉TN、NO3--N、NH4+-N、TP和COD的负荷量,薄露灌溉降低25.1%、6.2%、64.3%、-29.7%、7.5%,改进蓄雨薄露灌溉降低72.5%、72.4%、77.2%、69.9%、69.4%,沟畦适雨灌溉降低79.9%、74.6%、89.9%、81.8%、81.1%。综合来看,沟畦适雨灌溉的节水减污效果最好。
In order to study the rule of water utilization and nitrogen and phosphorus loss in paddy fields under different irrigation modes,and to integrate water-saving irrigation and pollution reduction technology reasonably,to realize the unity of high yield,water saving and pollution reduction,a plot experiment was carried out in agricultural drainage and irrigation technology demonstration base in Pinghu City.Four irrigation modes were set up in the experiment,namely conventional irrigation,thin dew irrigation,improved rain storage thin dew irrigation,and trench and furrow irrigation suitable for rain irrigation.The irrigation and drainage quantity in the field and the indexes of TN,TP,NH4+-N,NO3--N,and COD in drainage and seepage water were measured.The results showed that the irrigation quantity of thin dew irrigation improved thin dew irrigation,and furrow and furrow irrigation with rain reduced by 38.6%,73.4%,and 91.4%compared with conventional irrigation,respectively.Compared with conventional irrigation,thin dew irrigation reduces the load of TN,NO3--N,NH4+-N,TP,and COD by 25.1%,6.2%,64.3%,-29.7%,and 7.5%,while improved rain thin dew irrigation reduces 72.5%,72.4%,77.2%,69.9%,and 69.4%.Rain irrigation in furrow and furrow decreased by 79.9%,74.6%,89.9%,81.8%,and 81.1%.In general,furrow and furrow suitable for rain irrigation has the best effect on water saving and pollution reduction.
作者
周庭全
李圆圆
肖梦华
李彦彬
ZHOU Ting-quan;LI Yuan-yuan;XIAO Meng-hua;LI Yan-bin(College of Water Resources,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Zhejiang Institute of Water Conservancy and Estuarine(Zhejiang Institute of Marine Planning and Design),Hangzhou)
出处
《节水灌溉》
北大核心
2023年第9期88-93,99,共7页
Water Saving Irrigation
关键词
灌溉模式
节水
减污
irrigation mode
water saving
pollution reduction
