小麦单位面积产量构成因素由穗数、穗粒数和千粒重组成。穗粒数、千粒重受遗传基因所控制,一般因品种而异。在无特殊自然灾害情况下,其变化幅度不大。在我省小麦主穗数仍是提高产量的基础。因此,在目 Yield per unit area of ​​wheat production factors from the spikes, grains per spike and thousand grain weight. The number of grains per spike, thousand grain weight is controlled by the gene, generally varies by breed. In the absence of special natural disasters, the change is small. The main ears of wheat in our province are still the basis for raising production. So in the head