冬小麦不同调亏量灌溉试验研究

Experimental Study on Different Regulated Deficit Irrigation in Winter Wheat

用轻度、中度、重度三种不同调亏灌溉量,在冬小麦浇灌冻水和拔节水时进行调亏处理,结果显示,重度调亏处理在比正常灌水量减少40%的情况下,产量、千粒质量和穗粒数均低于对照,分别比对照减少56.25 kg、6.2 g和5.7粒;中度调亏处理在比正常灌水量减少25%情况下,产量、穗粒数也呈下降趋势,但差异不明显;轻度调亏处理在比正常灌水量减少15%情况下,产量、千粒质量、穗粒数等项指标或高于对照或等同于对照。

Winter wheat irrigation amount was conducted by three treatments as low, middle and high-grade regulated deficit before over winter and at stem elongation stage. The results showed that the yield, one thousand grains quality and grains per ear of highgrade regulated deficit treatment （60% of normal irrigation amount） were lower than that of CK, and decreased by 56.25 kg, 6.2 g and 5.7 grains respectively. The yield and grains per ear of middle-grade regulated deficit treatment （75% of normal irrigation amount） were also lower than that of CK, but the difference was not significant. The yield, one thousand grains quality and grains per ear of low-grade regulated deficit treatment （85% of normal irrigation amount） were equal or higher than that of CK.