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自1972～2004年度历时32年,对小麦的生育期进行了观察。结果表明,同一品种在适期播种条件下,同一生育期有的年份间出现的时间存在很大差异。从而影响小麦三个生育阶段的时间长短及群体大小,穗数多少和穗粒重的高低。因此,只有掌握各生育期的准确时间,采取相应的栽培技术措施,使不同生育期的群体指标合理,才能协调好茎数、穗数和穗、粒、重之间的关系,获得高产。
Since 1972-2004 took 32 years, the growth period of wheat was observed. The results showed that the same variety sowing conditions in the same period of the same growth period of time there is a big difference. Thus affecting the duration of the three stages of wheat growth and population size, spike number and the level of grain weight. Therefore, only by grasping the exact time of each growth period and adopting the corresponding cultivation techniques and measures to make the indicators of population at different growth stages reasonable, can the coordination between the number of stems, the number of spikes and the relationship between spike, grain and weight be achieved with high yield.