关键词: 烤烟；磷含量；分布特点；常规化学成分

Abstract:

This paper studied the distribution characteristics of phosphorus contents of 107 flue\|cured tobacco leaf samples from domestic main tobacco areas and Zimbabwe, and analyzed the relationships between phosphorus contents and routine chemical components. The results indicated that: ① the phosphorus content of domestic main tobacco areas ranged from 0.25% to 0.66% with the mean of (0.43±0.08)%, the phosphorus content of Zimbabwe ranged from 0.45% to 0.67% with the mean of (0.53±0.05)%; ② the order of the phosphorus contents in flue\|cured tobacco leaves among different areas was Zimbabwe (0.53%) > Southeast tobacco area (0.49%) > the upper and middle Yangtze River tobacco area (0.45%) > Southwest tobacco area (0.42%) > the Yellow and Huai River tobacco area (0.41%) > North tobacco area (0.39%), and the differences among these areas reached extremely significant level; ③ the phosphorus contents increased with the rise of stalk position, and there was no significant difference among different positions; ④ the phosphorus content in flue\|cured tobacco leaf had significant or extremely significant positive correlation with nicotine, potassium and chlorine contents, and had extremely negative correlation with total sugar, reducing sugar content and nitrogen/nicotine, sugar/nicotine, but had no significant correlation with total nitrogen and potassium/chlorine; ⑤ the clustering results based on the phosphorus contents and harmonic character evaluation of the chemical components at different phosphorus content levels showed that the flue\|cured tobacco leaves with medium and high phosphorus content clusters had proper chemical components, better harmony among indexes and high available value.

Key words: flue\, cured tobacco, phosphorus content, distribution characteristics, common chemical components