1引起玉米植株抗倒性下降的主要原因1.1种植品种不当有的品种本身抗倒性差,一般情况下,株高较矮、穗位较低、根系发达、茎秆粗壮且坚韧的品种抗倒能力较强,反之则抗倒能力较弱。不抗病虫害或抗病虫害能力差的品种,发生病虫害时,也易引起倒伏。1.2种植密度不合理在玉米播种时,不能做到因地制宜、因品种而定适宜的种植密度,造成密度过大,群体内光照弱、透光不 1 The main reason for the decline of lodging resistance in maize plants 1.1 Improper planting varieties Some varieties are themselves poor in lodging resistance, and in general, the plant height is short, the ear is low, the root system is developed, and the stalks with stalks are strong and tough. Strong, otherwise the ability to defeat the weaker. Not resistant to diseases and insect pests or pests and diseases of poor varieties, pests and diseases, but also easy to cause lodging. 1.2 Planting density is unreasonable In sowing corn, can not be done according to local conditions, due to the variety of suitable planting density, resulting in density is too large, weak light within the group, the light is not