摘要
在膜下滴灌条件下,采用灌溉量、滴灌频率、施肥量三水平三因素试验设计,对地膜洋葱产量和水分利用率的影响进行了分析研究,结果表明:洋葱生育期最优组合为灌溉量为4 500m3/hm2,每10d滴水1次、施N 270kg/hm2、P2O5210kg/hm2。随着灌溉量的增加,水分利用率和灌水效益降低。灌溉量为4 500m3/hm2处理水分利用率和灌水效益最高,分别为23.12kg/m3和15.0元/m3,较当地传统灌溉量节水50%以上。
Under the condition of drip irrigation under mulch,through experiment with three factors and three levels,the effects of irrigation water amount,frequency and fertilizer amount on the yield and water use efficiency of onion is studied in this paper.The result show that the most appropriate irrigation schedule is that the irrigation amount is about 4 500 m3 per hectare,the irrigation frequency is one time drip irrigation per ten days,the most appropriate amount of N fertilizer is about 270 kg per hectare,and the P2O5 fertilizer is 210 kg per hectare.The water use efficiency and irrigation efficiency will decrease with the increase of irrigation water amount.The treatment with the irrigation water amount of 4 500 m3 per hectare has the highest water use efficiency and irrigation benefit,which is 23.12 kg/m3 and 15.0 元/m3,respectively,and can save water above 50% compared to the traditional irrigation mode.
出处
《节水灌溉》
北大核心
2011年第8期36-39,42,共5页
Water Saving Irrigation
基金
甘肃省农业科技创新项目(21030106-技术推广)
关键词
滴灌
灌溉量
水肥耦合
洋葱
水分利用效率
drip irrigation
irrigation amount
coupling of water and fertilizer
onion
water use efficiency
