关键词: 小麦, 小麦, 抗旱, 分子标记, 基因工程

Abstract: Abstract: Field experiment was carried out in Yangling area to study the effect of border irrigation on soil water and growth of summer maize under the condition of optimal soil water lower limit, Meanwhile, for purpose of rational utilization of water resources, exploring optimum methods and technical routes of low irrigation quota and forming limited irrigation system of crop high efficient use of water. The results shows that the variation of average soil water content was small but of soil water distribution in border check of different border dimensions was big. The optimization inflow rate of unit width，border wide and border length in field experiments are in the rang of 3～6l/m/s,2～3m and around 50m could ensure high irrigation quality with Application Efficiency(Ea>80%) and Distribution Uniformity (DU>80%). The variation of physiological characters of maize was small with different border dimensions but big with different irrigation quota in jointing-heading stage of mazie. Under the condition of border irrigation of different irrigation quota had a big effect on summer maize yield and water use efficiency.