Removal of the shoot apex and leaf wounding did not show any influences on nitrogen uptake by plant, but increased nicotine production per unit nitrogen.

• 切除顶芽和叶面损伤对烟株体内的氮浓度及吸氮量均无显著影响，但显著提高了烟株体内单位氮素产生烟碱的能力。