摘要
由于其污染的严重性和控制的难度,农田氮磷流失造成的农业面源污染问题已经引起全球的关注。与传统灌溉相比,节水灌溉在减少农田氮磷流失方面具有一定优势。对湖北省漳河灌区2007-2008年试验资料进行分析,结果显示与传统灌溉相比较,节水灌溉能够节灌25%以上;排水量水稻减少45.0%,玉米减少11.6%,渗漏量水稻减少31.7%;氮肥利用率增加3%～5%,说明该地区实行节水灌溉可以在节水的同时,提高化肥利用率,降低氮磷流失量,减少对水环境的污染。
The agricultural non-point sources water pollution caused by nitrogen and phosphorus losses from farmlands have attracted global attentions due to its serious pollution and difficulties in control.Compared with conventional irrigation,water-saving irrigation has superiority of lessening nitrogen and phosphorus losses from farmlands.According to the experiment conducted during wet seasons in 2007-2008 in the Zhanghe Irrigation District in Hubei Province,China,the results show that compared to conventional irrigation,water-saving irrigation can save 25% of irrigation water,reduce 45% of drainage water in paddy field and 11.6% in corn field.It also can decrease 31.7% of percolation loss,and increase the nitrogen use efficiency to 3%~5%.This study indicates that implementation of water-saving irrigation in this region can not only save water,but also enhance fertilizer utilization efficiency,lower nitrogen and phosphorus losses,and cut down water environment pollution.
出处
《节水灌溉》
北大核心
2011年第8期1-4,共4页
Water Saving Irrigation
基金
国家自然科学基金重点项目(50639040)
国家自然科学基金项目(50979073)
国家"863"计划项目(2006AA06Z342)
湖北省自然科学基金项目(2005ABA290)资助
关键词
节水灌溉
农田排水
渗漏
氮磷流失
污染
water-saving irrigation
farmland drainage
percolation
nitrogen and phosphorus losses
pollution
