根据多年来小麦栽培的实践,作者认为影响小麦高产的限制因素主要是:基本苗起点过大,群体恶化苗质差;肥料运筹不科学,前重后轻,无效生长多;个体素质差,成穗率低;后期干物质积累不足,易退化和早衰,可孕花率低,充实度不高。故小麦不同穗形的形成,与群体的起点、肥料的运等等各种因素有关。小麦产量的高 According to the practice of wheat cultivation over the years, the authors believe that the limiting factors affecting wheat yield are mainly: the starting point of the basic seedlings is too large, poor quality of the population deterioration; fertilizer unscientific operation, before the weight of light, ineffective growth; poor individual quality, into Spike rate is low; lack of late accumulation of dry matter, easy to degenerate and premature aging, pregnancy rate can be low, the degree of enrichment is not high. Therefore, the formation of different spikes of wheat, and the starting point of the group, the transport of fertilizers and other factors. High wheat yield