寡日照地区，由于光照不足，严重限制了单产水平的提高。作者采用弱光照与弱光照品种之间杂交，或弱光照徊不同生态型品种之间杂交，选育出对弱光利用率高的新品种取得匪显增产效果。再在这个基础上，采用亚种间穿交（二棱修校），选育成功超大粒二棱大麦穗重型新品种，使大麦 Due to insufficient light, the increase in yield levels has been severely restricted in the areas with low sunshine. The author adopted the hybridization between the weak light and the weak light, or the hybrid between the different ecological varieties under the weak light, and obtained the effect of increasing the production of the bandit for the new varieties with high light utilization rate. Then on this basis, the use of inter-subspecies crossing (two-sided repair school), breeding successful large grain two-barley spike heavy new varieties so that barley