摘要
根据2006-2010年在浙江永康灌溉试验站开展的不同水肥处理田间对比试验,从节水、增产、提高水肥利用率及减少稻田氮磷和COD排放等4个方面的具体指标,分析了不同水肥处理的效果,提出了适合浙江省低山丘陵区单季稻的最优水肥综合调控模式,即间歇灌溉配合3次施氮肥方式,施氮肥量根据当地土壤肥力确定。与农民习惯模式相比,采用该最优水肥综合调控模式下的水稻灌水量减少26.5%,稻田总氮、总磷、COD排放分别减少50.1%、36.6%、45.2%,增产率9.4%,灌溉水分生产率提高47.8%,氮肥利用率提高36.7%。
According to the field contrast experiments unue um kang City during the period from 2006 to 2010, the effects of different water and nitrogen supply were analyzed from four specific in- dexes, water-saving, yield-increasing, improving water- nitrogen use efficiency and decreasing emissions of nitrogen, phosphorus and COD. Then the best water-nitrogen comprehensive regulation mode for single cropping rice in low mountains and hills of Zhejiang Province was put forward, that is intermittent irrigation with three fertilization way, nitrogen rate is determined according to local soil fertility. Compared with mode of farmers＂ habits, irrigation water is reduced by 26.5%, emissions of total nitrogen, total phos- phorus and chemical oxygen demand are reduced by 50. 1%, 36. 6%, 45.2%, yield-increasing rate is 9. 4%, the irrigation water productivity is increased by 47.8%, and nitrogen use efficiency is increased by 36.7 % under the best water-nitrogen comprehensive regulation mode.
出处
《中国农村水利水电》
北大核心
2012年第12期12-16,共5页
China Rural Water and Hydropower
基金
水利部"948"项目(201229)部分内容
关键词
水稻
节水
增产
减污
水肥综合调控
, rice
water-saving
yield-increasing
pollution-decreasing
water-nitrogen comprehensive regulation
