不同播种密度对冬小麦灌浆特性及产量的影响

Effects of Different Planting Densities on Grain-filling Characteristics and Yield of Winter Wheat

通过田间试验研究了种植密度对冬小麦籽粒灌浆特性、粒重和产量的影响。结果表明:种植密度对灌浆持续期没有明显影响,但对粒重和灌浆速率影响较大,低密度处理粒重最大,最大灌浆速率也最高。茎秆、叶片对籽粒的贡献率不同处理不同品种均为茎秆大于叶片;随种植密度的增加,穗粒数和千粒重减小,而中密度处理产量最高。

The effects of different planting densities on the grain-filling characteristics,grain weight and yield of winter wheat were studied through field experiments.The results showed that planting density had not significant effect on grain-filling duration,while it had great impact on grain weight and grain-filling rate,winter wheat planted at low-density had the highest grain weight and maximum grain-filling rate.For different varieties in different treatments,the contribution rate of the stem to the grain was all greaterthan that of the leaf. Along with the increase of planting density, the number of grains per spike and 1000 - grain weight decreased, while winter wheat in the middle planting density treatment had the highest yield.