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施用氮肥可显著促进甜菜叶丛生长，施氮量与产量和产糖量之间均呈二次曲线相关，与块根含糖率呈极显著的负相关，过量施用氮肥不利于甜菜干物质的合理分配，造成产量降低，产糖量减少。甜菜植株含氮量与施氮量呈显著正相关，地上部钾含量随施氮量增加而减少，而地下部钾含量随施氮量增加显著增加。本试验中甜菜的合理施氮量为120kg／hm2。
Nitrogen fertilizer application significantly promoted the growth of sugar beet leaves. Nitrogen application rate was positively correlated with the yield and yield of sugar. It was significantly negatively correlated with the sugar content of root tubers. Excessive application of nitrogen fertilizer was not suitable for sugar beet dry matter Distribution, resulting in lower production, reducing sugar production. There was a significant positive correlation between nitrogen content and nitrogen application rate in sugar beet plants. Potassium content in aboveground part decreased with the increase of nitrogen application rate, but potassium content in underground part increased significantly with increasing nitrogen application rate. In this experiment, the reasonable nitrogen rate of sugar beet is 120kg / hm2.