油菜倒伏比较常见,且越是高产的田越易倒伏。倒伏的油菜茎杆折断或折弯,水、肥运输受阻,光合作用下降,田间通透性劣化;如遇连续阴雨或田间湿度较高,极易感染菌核病、纹枯病等,造成茎杆、叶片和角果霉烂,产量下降15%~20%,严重的50%以上。1.产生倒伏的原因植株纤细、纤维含量相对较低、根系 Rape lodging is more common, and the more productive the more prone to lodging the field. Lost rape stems break or bend, water, fertilizer transport obstruction, photosynthesis decline, field permeability deterioration; In case of continuous rainy or field humidity is high, vulnerable to sclerotiorum, sheath blight, etc., resulting stem Rods, leaves and horny mildew rotten output fell 15% to 20%, a serious 50%. 1. The reasons for the emergence of lodging Slender plants, fiber content is relatively low, root system