Relationships between Climatic Factors and Chemical Components of Flue-cured Tobacco Leaves in Liangshan
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摘要: 运用简单和典型相关分析方法,对凉山烟区主要气象因子与烟叶化学成分含量的关系进行了研究。结果表明,几个主要气象因子对烟叶化学成分含量的影响为:日均温>空气相对湿度>日照时数>降水量>气温日较差;旺长期的气象因子对化学成分含量影响最大;气象因子对还原糖、总糖、总植物碱和钾含量影响最大;烟叶总糖、还原糖、总植物碱的含量与伸根期气温、成熟期气温、旺长期日照时数、成熟期空气相对湿度呈正相关,与旺长期气温、旺长期空气相对湿度呈负相关;糖碱比与成熟期降水量呈正相关。统计还发现,在一定范围内,旺长期的温度和空气相对湿度降低,旺长期日照时数和成熟期降水增多能明显提高烟叶的含钾量。Abstract: The relationships between major climatic factors in different growth periods of Liangshan tobacco-growing areas and chemical compositions of tobacco were investigated by using simple correlation and canonical correlation analysis. The result indicated that the effect of climatic factors on leaf chemical composition, from high to low were as follow: daily average temperature >relative air humidity>sunshine hours>precipitation>daily range of temperature. During field growth phase, the weather in the fast-growing stage had the greatest impact on the chemical composition. Meteorological factors were most influential on the reducing sugar, total sugar, total alkaloids and potassium content of flue-cured tobacco leaves. The contents of leaf total sugar, reducing sugar and total alkaloids showed a positive correlation with temperature of the root extending stage, maturity temperature, and maturity relative air humidity, and showed a negative correlation with temperature and relative air humidity of the fast-growing stage. Sugar and alkali showed a positive correlation with maturity rain fall. Within certain range, fast-growing stage temperature and relative air humidity reduction, as well as the increase of fast-growing stage sunshine hours and maturity rainfall was obviously in favor of the increase of leaf potassium.
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Keywords:
- Liangshan /
- climatic factors /
- flue-cured tobacco /
- chemical component /
- simple correlation /
- canonical correlation
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