开春后雨水增多,油菜田间荫蔽度加大,如果排水不良,湿度增高,会诱发菌核病的发生。因此要特别注意做好清沟排水工作,保证畦沟无积水,降低田间湿度,抑制病害发生。早春油菜适时适量施用春肥,有利于加快油菜生长发育,促进油菜春发。但不能偏施重施氮肥,应增施磷钾肥料,促使油菜茎秆坚硬,增强植株对病菌的抵抗能力。 After the spring increased rainfall, rape field shade increased, if the poor drainage, humidity, will induce sclerotinia. Therefore, special attention should be paid to clear the gully drainage work, to ensure that there is no water in the furrow, reducing the field humidity, inhibiting disease. Early spring rape timely application of spring fertilizer, is conducive to accelerating the growth and development of rapeseed, rape spring hair. However, we should not neglect the application of nitrogen fertilizers, phosphorus and potassium fertilizers should be increased to promote hard stalks of rapeseed and enhance plant resistance to germs.