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小麦生长后期(抽穗、开花、灌浆到成熟)是决定粒数和粒重,形成产量的时期。据测定,小麦开花后输送到麦粒的有机营养物质,有80—90％都靠抽穗后地上部叶、茎、穗等绿色器官制造的产物,其中顶叶、穗部和穗下茎制造得最多。因此,这一时期应围绕养根、护叶、争粒重的麦田管理。一、叶面喷肥。小麦后期,根据苗情进行叶面喷肥,补充一定的氮磷钾肥料,能延长上部叶片功能期,以利于制造光合产物。对生长一般,尤以浓绿的苗架在抽穗至扬花期亩用磷酸二氢钾
Late growth stage of wheat (heading, flowering, filling to maturity) is to determine the grain number and grain weight, the formation of the period of production. It has been determined that 80-90% of organic nutrients delivered to wheat kernels after flowering are produced by the production of green organs such as leaves, stems and spikes of the upper leaves after heading, in which the parietal lobe, ear, and spike stems are made most. Therefore, this period should focus on raising, protecting leaves, striving for the management of wheat fields. First, foliar fertilizer. Wheat late, according to the seedling situation foliar spray, add some nitrogen, phosphorus and potassium fertilizers, can extend the upper leaves of the functional period, in order to facilitate the manufacture of photosynthetic products. On the general growth, especially dark green seedlings in the heading to flowering acres of potassium dihydrogen phosphate