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倒伏在玉米生产田中常有发生。玉米倒伏有三种情况,即茎倒状、根倒状、茎倒折。因此,要加强防治,减轻倒伏,减少损失。一、玉米倒伏的原因1、施肥不合理,氮、磷、钾配合不合理,尤其氮肥过多。植株长势繁茂,易造成徒长。2、灌水不合理,苗期受涝,拔节前后肥水供应多,使节间长茎杆弱,易倒伏。3、自然灾害,近年来大风、冰雹等自然灾害是造成倒伏的主要原因。4、植株密度过大,个体发育不良,植株高而细弱,节间长,机械组织不发达。
Lodging occurs frequently in maize fields. There are three cases of corn lodging, that stem down, root inverted, stems fold. Therefore, we must strengthen prevention and control, reduce lodging, and reduce losses. First, the reasons for corn lodging 1, unreasonable fertilization, nitrogen, phosphorus and potassium with unreasonable, especially excessive nitrogen. Plants grow lush, easy to cause leggy. Irrational irrigation, waterlogging by seedling stage, before and after jointing fertilizer supply, so that the stem of the internode weak, easy to lodging. 3, natural disasters, winds, hail and other natural disasters in recent years is the main reason for lodging. 4, Plant density is too large, individual development is poor, tall and weak plants, internodes, underdeveloped mechanical organization.