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小麦后期主要是指抽穗以后的生长时期,含抽穗、开花、授精、灌浆、成熟过程。随着小麦植株最后一个节间(穗颈节间)的伸长,麦穗伸出剑叶叶鞘,麦穗抽出后2～5天开花,花粉粒落在柱头上经一天多时间授精完成,以后子房开始发育膨大,步入籽粒发育过程。约经10～15天,麦粒外形基本形成,开始积累淀粉,胚部的子叶、胚根、胚芽、胚芽鞘及第一片真叶原基等器官也分化完成,胚已具有发芽能力,继而进入籽粒灌浆和成熟过程。
The late wheat mainly refers to the growth period after heading, including heading, flowering, insemination, filling, maturation process. With the elongation of the last internode (panicle neck and internode) of wheat plants, the wheat ears protrude out of the sheath of the flag leaf, 2-5 days after the ears have been removed, and the pollen grains fall on the stigma and are fertilized for more than one day later Ovary began to expand the development, into the grain development process. After about 10 to 15 days, the grain shape basically formed, began to accumulate starch, embryo cotyledon, radicle, germ, coleoptile and the first true leaf primordia and other organs are also differentiated, the embryo has the ability to germinate, and then into the grain Grouting and maturation process.