在大面积生产上,三麦产量的高低与每亩穗数密切相关;而穗数多少,又以其分蘖为转移.一般播种适时、栽培管理较好的麦田,有1/3～1/2左右的有效穗是由分蘖构成的.因此,研究三麦分蘖与成穗的气象生态规律,是正确制定三麦管理措施、夺取大面积稳产高产的重要依据. In large-scale production, the level of three-crop yield is closely related to the number of spikes per acre, while the number of spikes is also shifted by its tillering.It is generally in the order of 1/3 to 1/2 Therefore, to study the meteorological and ecological rules of tillering and spike formation of three wheat is an important basis for correctly formulating management measures for three wheat and for seizing large area, stable yield and high yield.