氮素营养对甜菜的产量、质量关系最大,这是被国内外许多专家的试验所证明了的。目前,在甜菜施肥上主要以氮肥为主,而且 NH_4—N 较多,NO_3—N 较少,惯用种肥、追肥二种施肥方式,追肥有1—3次不等。而国外在甜菜施肥上 N、P、K 适当配比组成复合肥,播种前采用一次性施肥,其用意在于促进苗期迅速生长,提前进入叶丛繁茂期,为后期的块根肥 Nitrogen nutrition beet yield, the quality of the largest relationship, which is the test of many experts at home and abroad to prove. At present, mainly in the sugar beet fertilization on nitrogen-based, but more NH_4-N, NO_3-N less common fertilizer, top-dressing two kinds of fertilization, dressing 1-3 times. Abroad, sugar beet fertilization on the N, P, K appropriate ratio composed of compound fertilizer, sowing before the use of a one-time fertilization, its purpose is to promote the rapid growth of seedling stage, advance to leaf thickening period for the late root-block fertilizer