论文部分内容阅读
对陇东黄土高原半湿润半干旱气候区冬小麦生长量、灌浆速度等指标与气象要素、水分因子、生长势、产量以及产量构成要素进行了相关分析,结果显示春季营养生长阶段,发育期降水对生长量正效应显著,光照、积温等光、热要素对生长量负效应显著。进入生殖生长阶段以后,发育期降水对生长量、产量和灌浆速度的影响逐步减弱,光、热要素由前期的负效应转变为正效应,光照对陇东冬小麦后期生长和产量形成尤为重要。而进入生殖生长期以后,由于降水对光照的影响,前期土壤水库蓄水成为冬小麦有效耗水的主要来源。
The correlation analysis was made between the index of winter wheat growth and grain filling rate and the meteorological factors, water factors, growth potential, yield and yield components in semi-humid and semi-arid climate zone of Longdong Loess Plateau. The results showed that in spring vegetative growth stage, Positive growth effect is significant, light, accumulated temperature and other light and heat elements on the growth of significant negative effects. After entering the stage of reproductive growth, the effects of precipitation on growth, yield and grain filling rate gradually weakened. The light and heat elements changed from the negative effects of the earlier period to the positive ones. The light was particularly important for the late winter wheat growth and yield formation. After entering the reproductive growth period, due to the impact of precipitation on the light, the pre-soil water storage has become the main source of effective water consumption of winter wheat.