干旱胁迫下不同抗旱性小麦品种产量形成与水分利用特征
Characteristics of yield formation and water use in different drought tolerance cultivars of winter wheat under drought stress

在移动防雨棚条件下,以晋麦47(抗旱性强)、偃展4110(抗旱性弱)和矮抗58(抗旱性中等)为材料,在足墒播种、安全越冬基础上,设置拔节~成熟期持续干旱(W1)、开花~成熟期干旱(W2)、拔节~成熟期供水适宜(W3)3种水分处理,研究了干旱胁迫对不同抗旱性冬小麦品种产量形成和水分利用的影响。结果表明:供水适宜时3个品种的产量和水分利用效率皆无显著差异,干旱胁迫显著降低了各品种产量,降幅表现为晋麦47
To investigate the effect of drought stress on the yield formation and water use in different drought tolerance cultivars of winter wheat,three cultivars,JM47 (strong drought resistance),YZ4110 (weak drought resistance) and AK58 (moderate drought resistance),were planted under rain-proof shelter conditions in 2012-2013 and 2013-2014.In the trial,three moisture treatments,including persistent drought from jointing to maturity (W1),drought from anthesis to maturity (W2) and suitable water supply from jointing to maturity (W3) were conducted on the basis of seeding at sufficient soil moisture for overwintering security.The results indicated that there were no significant differences in the grain yield and water use efficiency among different cultivars when the water supply was suitable.However,its grain yield was decreased significantly under drought stress conditions,and the order of decreasing level was JM47