水分对冬小麦产量及水分利用效率的影响

EFFECT OF WATER SUPPLY ON THE YIELD AND WATER-USE EFFICIENCY IN WINTER WHEAT

通过对冬小麦生育期不同阶段进行水分控制试验,研究了不同控水处理对冬小麦的产量的影响,同时对不同水分条件下不同冬小麦品种的产量、水分利用效率和耗水量之间的关系以及产量构成因素对产量的贡献进行了探索。结果表明,各种灌水方案中,以拔节—抽穗期的2次灌水效果最好。随灌水量的增加,产量表现出抛物线型变化,而水分利用效率呈现对数关系。参试品种中,以品种6365的抗旱性能和产量潜力最好。

In a controlled irrigation experiment, winter wheat was grown with different water treatments to study their effect on the yield, water use efficiency and water consumption and on the contribution of various yield - forming characters to grain yield of the crop. Of all the treatments adopted, the treatment of double irrigation （ made at the stem -elongation and heading stages） gave the best result. Irrigation was in a parabolic relation with yield and in a logarithmic relation with water use efficiency. Of the wheat varieties studied, the variety 6365 performed best, with outstanding drought tolerance and high yield potential.