促甜菜块根肥大三法１．追施化肥。甜菜进入叶丛繁茂期，对养分的需要量急剧上升，这时要适量追肥。在封垄前结合中耕培土进行。每亩追施尿素１５－２０公斤。追肥不宜太晚，以免使甜菜茎叶徒长、影响块根增长。２．叶面喷肥液。甜菜进入生长中后期，经常会出现缺乏一些必... Promote beet root hypertrophy three law 1. Topdressing fertilizer. Beet into the thickening of the bushes, the sharp increase in nutrient requirements, then top-dressing. Cofounded in the ridge before farming and soil. Topdressing urea 15-20 kg per acre. Top dressing should not be too late, so as to avoid beet stems and leaves lengthened, affecting tuber growth. 2. Foliar spray liquid. Beet into the growing late, often there will be some lack of ...