“春菜猛如虎”。这句话形象地说明了开春以后,随着气温的逐渐回升,油菜的生育进度迅速加快。从现蕾抽苔到开花,是油菜的营养生长和生殖生长双旺阶段,根系的吸收能力大大加强,地上部分增枝长叶,开花结角都先后进入盛期。因此,这时的需肥量最多,约占油菜总需肥量的50%左右。这一时期,油菜生长发育所需的养分来源,一部分来自腊肥和春肥,而大部分是靠苔肥来满 “Spring vegetables Mengru tiger.” This sentence vividly illustrates the beginning of spring, with the gradual rise in temperature, rape rapid progress of childbearing. From the bolting of bolting to flowering, is rape’s vegetative and reproductive growth Shuangwang stage, the absorption capacity of the root system has been greatly strengthened, the ground part of the growth of branches and leaves, flowering knot has entered the peak. Therefore, at this time the amount of fertilizer required, accounting for about 50% of the total required amount of rapeseed fertilizer. During this period, the nutrient sources required for the growth and development of rape were partly derived from wax and spring fertilizers, most of which were covered with moss