不同施氮量对甜菜的产质量效应研究

Study on the effect of yield and quality in sugarbeet with different nitrogen amount applied

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。

：The growth of sugarbeet tops was significantly promoted by nitrogen fertilizer applied there are conic correlations among nitrogen application amounts root yield and sugar yield．There is a significantly negative correlation between nitrogen application amounts and sugar content in root excessive nitrogen application made against dry matter distribution in reason and reducing root and sugar yield．There is a positive correlation between nitrogen application amounts and nitrogen content in sugar beet plant with nitrogen application amounts increasing K contet of tops significantly decreased and K content of root increased the optimum nitrogen amount is 120kg／ha in this study．