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小麦中期是拔节到抽穗开花这段时期。这段时期由于幼穗体积不断增大,叶面积迅速扩展,植株急剧长高,是小麦一生中发育最旺盛,需肥需水最多,营养生长和生殖生长矛盾突出的时期。如果这一时期缺肥缺水,幼穗发育不良,叶面积不够扩展,则会引起穗小粒少。如果肥、水过多,群体过大,不通风透光,则又引起
The middle stage of wheat is the period from jointing to heading and flowering. During this period, due to the ever-increasing panicle size, the rapid expansion of leaf area and the rapid growth of the plant, wheat is the period in which wheat has the most vigorous development, needs fertilizer and water demand, and has a prominent contradiction between vegetative and reproductive growth. If the lack of water and lack of water during this period, young panicle dysplasia, leaf area expansion is not enough, it will cause less spikelets. If fat, too much water, groups are too large, not ventilated, it is caused