| 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. |