Abstract:

In order to improve irrigation efficiency, and make use of water-saving irrigation techniques to sorghum, the tests were carried out. Use the method of randomized block experiment to study save-efficient of sorghum. It compared the alternate furrow irrigation at different amount to the traditional flood irrigation. The results showed that, using alternate furrow irrigation when the irrigation water reached 75 mm, the change of the photosynthetic parameters, such as the stomatal conductance, transpiration rate, net photosynthetic rate and other ones was not significant compare with the irrigation amount was 135 mm, and the yield considerable. But alternate furrow irrigation can increase water use efficiency 11.94%, reduce evaporation 32.49%, and saving irrigation water 44.44%. Use of alternate furrow irrigation had significant water saving effect in condition of considerable yield.