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作 者 ：祖艳群 林克惠

期 刊 ：西北植物学报 2000年 5期

关键词：烟叶；氮营养；钾营养；氮钾平衡；烤烟；

Keywords:tobacco leaves, N nutrients, K nutrients, balance of N and K,

摘 要 ：研究了滇中地区烤烟中部叶片旺长期（移栽后６０－６５ｄ）Ｎ、Ｋ营养及Ｎ、Ｋ平衡。结果表明：⑴烟叶一般Ｎ含量为２．５％－４％，Ｋ含量为１％－３％，Ｎ／Ｋ比为２．５－３．５。⑵烟叶Ｎ含量＞４％，就有Ｎ过剩的症状产生。⑶烟叶Ｎ含量＜２．５％，Ｋ含量＜１％，就表现出Ｎ、Ｋ缺乏症状。⑷烟叶Ｎ／Ｋ比失调，过高或过低，都会影响烟株正常生长。

Abstract:N and K concentrations and N and K balance in tobacco middle leaves were investigated in the center of Yunnan province at the vigorous growing stage.Results showed that:(1) Generally,ranges of N and K concentrations in tobacco leaves were \{2.5%\}~4% and

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