油菜在低温条件下,容易遭受冻害,尤其是秋发较好的油菜,由于叶绿、叶嫩,更容易遭受低温的冻害。因此,加强油菜冬前的栽培管理,巩固油菜秋发成果,抓好防冻措施是十分必要的。其具体措施如下:一、增施磷钾磷能促进油菜根系发育,增强油菜抗寒性;钾可提高油菜抗寒、抗病、抗倒伏的能力。因此,在追施肥料的过程中应适当控制或减少氮肥的施 Rape under low temperature conditions, susceptible to frost damage, especially the better autumn rape, due to leaf green, leaf tender, more susceptible to cold damage. Therefore, to strengthen the winter rape cultivation and management, to consolidate the rape autumn hair results, do a good job antifreeze measures is very necessary. The specific measures are as follows: First, the application of phosphorus and potassium phosphorus can promote root development of rape, rapeseed to enhance cold resistance; potassium rape can improve cold, disease resistance, lodging resistance. Therefore, in the process of topdressing fertilizer should be appropriate to control or reduce the nitrogen fertilizer application