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冬、春性小麦品种早播（９ 月３０ 日）、适播（１０ 月３０ 日）的总小花数、可孕小花数及结实粒数均极显著高于晚播（３ 月２ 日）。晚播对春性品种小花分化发育与结实的不利影响小于冬性品种。穗粒数的多少与可孕小花数及其结实率密切相关，而与总小花数及其结实率无明显联系；同时大穗多粒基因型也以较高的可孕小花结实率为生理基础。孕穗期小花数均与叶面积、叶片重、叶鞘重和总干物重呈显著或极显著正相关，而与茎高的相关不显著。此外，冬、春性品种的结实粒数均与成熟期茎叶重、总单茎重、结实小穗数、穗长和穗粒重之间呈极显著正相关，表明良好、协调的营养生长与生殖生长的关系是改善小花发育质量、提高穗粒数的根本保证。
Winter wheat and spring wheat varieties were significantly sowed for early sowing (September 30) and suitable sowing (October 30), and the numbers of fertile florets and grains were significantly higher than that of late sowing (March 2). Late sowing of spring sex flower floret development and fruiting is less adverse effects than winter varieties. The number of spikelets was closely related to the number of fertile florets and their seed setting rate, but not to the total number of florets and their seed setting rate. At the same time, the large spike and multiple grain genotype also had the physiological basis of high fertility rate . The number of floret at booting stage was significantly or very significantly positively correlated with leaf area, leaf weight, leaf sheath weight and total dry weight, but not with stem height. In addition, the grain number of winter and spring varieties were significantly and positively correlated with the weight of stems and leaves, total stem weight, number of spikelets, spike length and grain weight at maturity, which indicated that good and coordinated vegetative growth The relationship with reproductive growth is to improve the quality of floret development and improve the number of grains per spike.