甜菜作为制糖工业的原料,不仅要求产量高,而且要求糖分高。氮素是影响甜菜产量和含糖率最活跃的因素之一,要求以正常的氮代谢促进甜菜糖分的合成和积累。本文着重讨论甜菜氮代谢及其与糖代谢的关系,以及讨论过量氮素引起甜菜含糖率下降的机理,从而为合理施用氮肥——获得最佳产糖量提供依据。 Beet as a sugar industry raw materials, not only requires high yield, but also requires high sugar. Nitrogen is one of the most influential factors affecting the yield and sugar content of beet, and it is required to promote the synthesis and accumulation of sugar beet with normal nitrogen metabolism. This article focuses on the nitrogen metabolism of sugar beet and its relationship with sugar metabolism, as well as to discuss the mechanism of sugar content decline caused by excess nitrogen, so as to provide the basis for the rational application of nitrogen fertilizer - to obtain the optimum sugar yield.