不同水分亏缺对向日葵产量、水分利用效率及经济效益的影响

通过盆栽试验对向日葵进行不同水分亏缺处理,研究其产量、水分效应及经济效益的变化。结果表明,向日葵高水分处理的产量高于低水分处理,切不可在作物临界期进行水分亏缺,不可对作物3个生育期连续亏缺;适宜调亏灌溉可以提高向日葵水分利用效率;耗水量和产量有极大的相关性,随着耗水量的增多产量增大;在水资源充足的情况下,充分灌溉经济效益固然高,但在不能满足充分灌溉时,适宜水分亏缺可提高作物经济效益。

Effect of different water deficit on yield, water use efficiency and economic benefit of sunflower

Effect of different water deficit on yield,water effect and economic benefit was studied by sunflower pot experiments.The results showed that the yield of sunflower under high water treatment was higher than low water treatment,and water deficit could not be processed in crops critical period or in three continuous growth periods;suitable deficit irrigation could improve water use efficiency of sunflower;relative water consumption and relative yield had larger correlation;if water resource was rich,economic benefit would be high under the full irrigation condition;but appropriate water deficit could improve economic benefits when it could not meet the need of the full irrigation.