在旱地大田条件下对鲁麦 2 1与D2 7两品种生育后期旗叶与群体光合速率、籽粒灌浆速率及产量变化进行了研究 ,认为旱地小麦要获得高产必须保持开花后高的旗叶与群体光合速率 ,以有利于籽粒灌浆速率维持 ,形成高产 Under the condition of dry land and field, the photosynthetic rate, grain filling rate and yield of flag leaf and population of two cultivars of Lumai 2 1 and D2 7 in late growth stage were studied, and it was considered that the high yield of dry land wheat must maintain the high flag leaf and population Photosynthetic rate, in order to facilitate the maintenance of grain filling rate, the formation of high yield