冬季天气寒冷,除传统的方法外,确保油菜安全越冬还有以下新法:1、增施磷钾肥。磷能促进油菜根系发育,增强抗性;钾能提高油菜抗寒、抗病、抗倒能力。2、松土增温。油菜田应进行中耕松土,破除土表板结,改善通透性,提高表土温度。其原则是:天干寒冷浅耕,土板潮湿深耕;地干雨前松, Cold weather in winter, in addition to the traditional methods, to ensure the safety of rape overwintering there are the following new law: 1, the increase of phosphorus and potassium fertilizer. Phosphorus can promote rape root development, enhance resistance; Potassium can improve cold hardiness, disease resistance, lodging resistance. 2, loose soil warming. Rape fields should be cultivated loose soil, break the soil surface knot, improve permeability, increase surface temperature. The principle is: dry days cold tillage, deep plowing soil plate; dry pine before the rain,