据观察试验表明,小麦倒伏后,靠自然恢复的减产最小。这是什么原因呢?原来植物的茎叶有强烈的向光性和向上性,能够靠阳光的晒向上弯曲生长,使倒伏的麦株又能直立或半直立起来,并能保持叶片进行光合作用。倒伏后,如用人工扶起来捆把或搭架,茎叶捆在一起,不能自展散开,通风透光不良,容易发黄霉烂,失去光合作用的能力,再加上人为踩踏,折茎断 According to observational experiments show that after lodging of wheat, natural yield reduction by the smallest. What is the reason? The original plant stems and leaves have a strong light and upward, can rely on the sun bending upward growth, so lodging upright or semi-erect wheat plants upright, and can keep the leaves for photosynthesis . After lodging, such as hand-bounded to bundle or frame, stems and leaves tied together, not self-spreading, poor ventilation poor, easy to yellow rotten, loss of photosynthesis ability, coupled with man-made stampede, Off