小麦从低产向中产发展,主要的栽培措施是增加每亩成苗数与增加施肥量。从光能利用角度看,这些措施的作用都是增加叶面积。但中产向高产发展,如果仍采用这些措施,叶面积增加过多,结果不但不能得到高产,而且增加不必要的投资,还将造成严重倒伏。因此,小麦生产从中产水平向高产稳产高效益的方向发展,从光能利用角度看,需 The development of wheat from low to middle production, the main cultivation measures is to increase the number of seedlings per acre and increase the amount of fertilizer. From the perspective of light energy utilization, the effect of these measures is to increase the leaf area. However, if these measures are still used, the increase in middle-yield to high-yielding will lead to too much increase in leaf area. As a result, not only will high-yielding be avoided, but unnecessary investments will also result in serious lodging. Therefore, wheat production from the middle level to the direction of high and stable yield and high efficiency, from light energy use point of view, the need