通过多年的小区高产栽培试验和高产攻关,研究了小麦返青开始期的早、晚对穗数影响。结果表明,小麦返青开始期早晚,年后幼苗阶段时间长短、积温多少,对春季分蘖生长,冬前分蘖素质和成穗数均有显著影响。因此,应根据不同年份,采取以促为主、促控结合、前控后促3种不同的田间管理技术,以获得穗足、不倒和高产。 Through years of high-yielding cultivation experiments and high-yielding research, the effect of early and late wheat rejuvenation on ear number was studied. The results showed that wheat regrowth began early and late, the seedling stage after the year and accumulated temperature had significant effects on the tiller growth, the tillering quality and the number of spikes per panicle. Therefore, according to different years, we should take the promotion as the mainstay, the combination of promotion and control, and the promotion of three different field management techniques after the pre-control so as to obtain the ear full, not fall and high yield.