打顶后供钾水平对烟草体内钾素积累分配的影响

摘要

Through sand or solution culture, we studied the influence of potassium rates on the potassium accumulation in tobacco after removal of the apical bud. The results showed that removal of apical buds promoted the growth of tobacco, increased biomass. Potassium could move actively in tobacco plant. In treatment without potassium added, the potassium transported largely from tobacco root to leaves;Potassium application significantly increased the potassium concentration in tobacco. Removal of the apical bud decreased the potassium concentration and content, but the potassium accumulation in leaves increased, especially the upper leaves increased significantly.%本试验采用砂培和营养液培养的方式，探索了打顶后供钾水平对烟草体内钾素积累分配的影响。结果表明，打顶能够促进烟株的生长，增加生物量。钾素在烟株体内移动活跃，无钾培养烟株的根部有大量钾素向叶片运输；提高供钾水平，烟株的钾浓度和钾含量显著提高。打顶后烟株的钾浓度和钾含量下降，但钾素在叶片的积累量增加，上部叶片的钾含量显著提高。