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采用人为改变结实率的方法，研究杂交小麦结实率对粒重及产量的影响，结果表明：（１）在不同肥力条件下，结实率与产量均呈极显著的正相关，与千粒重增值呈极显著的负相关。（２）在高肥水条件下，千粒重增值较大，结实率对产量的影响较小；在中肥水条件下，千粒重增值较小，结实率对产量的影响较大。（３）大粒型、库容弹性大的杂交种，粒重自调能力最强，产量受结实率的影响最小。在杂种优势利用时，高肥水杂交种结实率应高于８３％，中肥水杂交种结实率应高于８６％，并要注重大粒型、库容弹性大的杂交种的选配工作。
The results showed that: (1) Under different fertility conditions, the seed setting rate and yield were significantly and positively correlated with the grain weight increment value was extremely Significant negative correlation. (2) Under the condition of high fertilizer and water, the 1000-grain weight increment value is larger, and the seed setting rate has less influence on the yield. Under medium fertilizer and water condition, 1000-grain weight increment value is small, and the seed setting rate has greater influence on the yield. (3) Hybrids with large grain size and large storage elasticity had the strongest self-regulation of grain weight, and the yield was least affected by the seed setting rate. In the utilization of heterosis, high fertility of hybrids should be higher than 83% seed set, medium fertility hybrid seed setting rate should be higher than 86%, and should pay attention to the large grain size, flexibility of the hybrid seed matching work.