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油菜倒伏原因品种选择不当:选用的油菜品种茎杆细软、根茎比例不协调、弹性不好、不耐肥、地上部分生长过旺。氮肥施用过多:油菜氮肥施用过量易造成徒长、田间阴蔽、茎杆的木质化程度低、茎杆细软而易倒伏。后期贪青晚熟、易遭病虫危害,也易倒伏。管理不及时:高脚苗、曲根苗是发生倒伏的一个重要因素。油菜苗期不及时
Rape lodging reasons for improper selection of varieties: Selection of varieties of rape stems thin soft, inconsistent proportion of rhizomes, flexibility is not good, not fat, over-growth of the ground part. Excessive use of nitrogen fertilizer: excessive use of nitrogenous fertilizer rape can cause leggy, field shade, low degree of lignification of stalks, stem soft and easy to lodging. Late greed green late, vulnerable to pests, but also easy to lodging. Management is not timely: high seedlings, Qugen Miao is an important factor in the occurrence of lodging. Rape seedling is not timely