but 60% N treatment appeared another peak in nitrogen accumulation after transplanting 75 days, it does not accord with the requirement of high quality tobacco production.

• 饼肥氮占总氮20%25处理烟叶内氮的积累在烤烟移栽后60天达到高峰，60天之后氮积累量减少，符合烟叶氮吸收规律，饼肥氮占总氮60%25处理烟叶内氮的积累在烤烟移栽后75天后又出现积累增加的趋势，与烟叶对氮的需求规律相矛盾。