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小麦产量构成的主要因素是:单位面积收获穗数、穗粒数和千粒重。但是在最近几年春小麦大田生产论验和自治区春小麦区试总结材料中,出现春小麦收获穗数低于基本苗。例如《新疆农垦科学》1998—1期“小麦和棉花专家系统的开发应用初报”
The main factors that make up of wheat yield are: the number of ears harvested per unit area, the number of grains per spike and the weight of 1000 seeds. However, in recent years, field trials of spring wheat production and regional spring wheat summary materials, the emergence of spring wheat spike is lower than the basic seedlings. For example, “Xinjiang Agricultural Reclamation Science” 1998-1 “wheat and cotton expert system development and application of”