Result suggested that the different N treatment may cause flavonoid, phenol, soluble sugar, free amino acid content difference at topping, and the brown spot severity difference after topping.

• 这表明不同施氮量烟株成熟期赤星病发生的差异在一定程度上与发病初期烟叶中的类黄酮、总酚、可溶性糖和游离性氨基酸含量以及氮累积量的差异有关；