不同灌溉方式对晚造超级稻产量及水分利用效率的影响

Effects of Different Irrigation Methods on Late Super Rice Yield and Water Use Efficiency

以超级稻品种特优航1号、天丰优998为试验材料,于2008年、2009年晚造进行大田栽培,比较了其在3种不同灌溉方式下的农艺性状、产量及水分利用效率。结果表明:控水灌溉②超级稻品种的株高、剑叶面积、产量及水分利用效率最高;灌溉量最小。特优航1号,天丰优998在2008年和2009年分别节水33.25%、31.99%和33.43%、36.55%。控水灌溉②是桂南稻作区晚造超级稻较为适宜的灌溉方式。

Taking two super rice cultivators Teyouhangl and Tianfenyou998 as the experimental mate- rials, field cultivation experiment of late rice was conducted in 2008 and 2009. The agronomic characters , yield and water use efficiency under three different control irrigation treatments were studied. The results showed that plant height, flag leaf area yield and water use efficiency of Teyouhangl and Tianfenyou998 were the highest under the water-control irrigation treatment ]I ; and the irrigation rate was the low- est. Under the water-control irrigation treatment Ⅱ, Teyouhangl and Tianfenyou998 saved water by 33.25%, 31.99% and 33.43%, 36.55% respectively in 2008 and 2009.So the water-control irrigation treatment Ⅱ will be a relatively suitable irrigation mode for the late super rice planting in the south of Guangxi.