银北灌区油葵节水灌溉制度研究

The Study on Water-saving Irrigation Schedule of Oil Sunflower in Yinbei Irrigation Area

通过田间试验研究了冬灌地油葵生育期灌水次数对产量和灌水生产率的影响。结果表明,增加灌水量和灌水次数对油葵的产量并无显著影响,说明在油葵全生育期不灌水的条件下,银北灌区通过冬灌土壤水能满足油葵生长发育的要求;从水资源高效利用的角度而言,通过前一年冬灌,油葵以全生育期不灌水为宜,其灌溉水生产效率高达3.078 9 kg/m3。

The effect of irrigation frequency on the yield of oil sunflower was studied though field experiment. The result shows that it is no significant effect on yield of oil sunflower to increase irrigation frequency and irrigation application. This result indicated that soil water can meet the water requirement of oil sunflower under no irrigation application within whole growing season of oil sunflower through winter irrigation in Yinbei irrigation area. From the point of view of effective use of water resources, it is optimum practice that there is no irrigation application within whole growing season of oil sunflower through winter irrigation of last year. The irrigation water productivity is 3. 078 9g/m^2 under no irrigation application within whole growing season of oil sunflower.