【摘要】 为了提高民勤绿洲水资源利用率,在该地区棉田进行了滴灌、半固定式喷灌和渠道防渗灌溉3种不同灌溉模式的节水综合效益比较试验。结果表明,与大水漫灌相比,防渗渠灌节水40.4%,滴灌节水49%~55.6%,喷灌节水59.2%;防渗渠灌、滴灌和喷灌分别省工3.6%、16.2%和25.1%;滴灌、喷灌和防渗渠灌分别节电38.5%、31.1%和29.2%。滴灌和防渗渠灌收效明显,可在该地区推广应用。更多还原

【Abstract】 In order to improve water resources use efficiency in Minqing oasis,trial of irrigating cotton is done by three different ways,which is drip irrigation,semifixation spray irrigation and seepage-preventing ditch irrigation.By study of one growth season,it showed that seepage-preventing ditch irrigation economize 40.4% water,drip irrigation economize 49～55.6% water and spray irrigation economize 59.2% water;Seepage-preventing ditch irrigation,drip irrigation and spray irrigation save work respectively 3.6%,16.2% and 25.1%,economize electricity respectively 29.2%,38.5% and 31.1%.Furthermore,the result of water-saving irrigation of oasis cotton shows that drip irrigation and seepage-preventing ditch irrigation have obvious effect and can apply in this region.更多还原