氮肥对甜菜营养生长的影响

分析看出,施氮量与甜菜4个营养生长期的根、叶片、叶柄生长量均呈极显著正相关。苗期氮素主要用于促进叶片的生长,随生育进程根对氮素的依赖程度渐高;苗期、块根糖分增长期、糖分积累期不同氮素水平与T/R值呈显著正相关,与分配率呈显著负相关;叶丛快速生长期施氮量对T/P值、分配率无大影响;不同施氮量与叶面积、光合势呈显著正相关。

Effect of Nitrogen on the Vegetation Growth in Sugarbeet

The analysis results have shown that there was a significant positive correlation on nitrogen with increment of root,leaf blade,peticle during four stages of vegetation growth in sugarbeet. During seedling stags, nitrogen was mainly used to hastening growth of blades,the level of root depending on nitroge, raised step by step along with the growth course. There was a significant positive correlation between the nitrogen level and T/R during seedling stage sugar content increasing stage,sugar content accumulating stage and there was a significant negative correlation to partition ratio no big effect of nitrogen applied on T/R and partition ratio during lush growing stage of foliage and there was a significant positive correlation between leaf area and photosynthesis capacity with different amount of nitrogen applied.