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淮北地区冬小麦穗形成过程按品种特性,大体可以划分为两种类型:“年前分化型”,穗分化开始于年前,分化持续期长;“年后分化型”,穗分化开始于年后,分化持续期短。麦穗各部位增粒潜力有差异,中下部较其他部位具更大的增粒潜力。不同生产条件及产量水平下,小穗数、小花数及其结实率在增粒作用上有差异,故对三者要求应有所侧重。
The process of spike formation of winter wheat in Huaibei area can be divided into two types according to the characteristics of cultivars: “year ago differentiated”, spike differentiation began years ago, differentiation continued for a long period; “year after differentiation”, spike differentiation began after years , Differentiation of short duration. Different parts of the wheat grain potential increase there are differences in the lower part of the larger parts of the grain with greater potential. Under different production conditions and yield levels, the number of spikelets, the number of florets and their seed setting rate are different in the role of granulation, so the three requirements should be focused.