通过不同土壤水分处理对冬小麦开花后光合产物积累运转影响的研究表明：小麦开花后光合产物积累量随土壤水分增加而升高；土壤缺水使营养器官光合产物向外输出开始时间提早，输出值占籽粒重比增大，各器官输出占粒重比顺序为茎＞叶＞鞘＞穗；土壤水分亏缺使籽粒灌浆强度上升的早而快，高峰值提前，后期下降也早而快 The results showed that the accumulation of photosynthate after flowering of wheat increased with the increase of soil water content. The soil water deficit led to the earlier start of output of photosynthate from vegetative organs, and the output value Accounting for the grain weight ratio increased, the ratio of the output of each organ accounted for the weight ratio of the stem> leaf> sheath> ear; soil water deficit to grain filling strength increased early and fast, the peak early, the early decline sooner rather than later