小麦倒伏减产的主要原因是:①植株相互遮盖,光照不足,光合效率降低,灌浆受到影响;②小麦自身呼吸加强,有机物的消耗多,积累少;③通风透光差,地面湿度 The main reasons for wheat lodging and yield reduction are as follows: ①the plants cover each other, the illumination is insufficient, the photosynthetic efficiency is reduced, and the grouting is affected; ② the wheat itself has stronger respiration, less organic matter and less accumulation;