烤烟叶片茄酮含量与土壤化学性状的关系

Relationships between Soil Chemical Properties and Contents of Solanone in Flue-cured Tobacco Leaves

通过分析河南许昌市5个烟区土壤与烟叶各45份成对样品的测试数据,运用偏相关分析、逐步回归分析和通径分析等方法,研究了土壤化学性状与烤烟叶片中茄酮含量的定量关系。结果表明:土壤有机质、全氮、全钾、有效氮、土壤阳离子交换量、全铝、全镁和全钠是影响河南许昌烤烟叶片茄酮含量的主要土壤化学性状指标,8项指标联合决定着烤烟叶片茄酮含量98.87%的变化。对烤烟叶片茄酮含量直接影响最大的是土壤有机质,其次为有效氮、土壤阳离子交换量、全氮、全铝、全钠、全镁和全钾。其中,土壤有机质对烤烟叶片茄酮含量产生明显的直接正面效应,而土壤有效氮、土壤阳离子交换量对烤烟叶片茄酮含量产生直接的负面效应。土壤有效氮是烤烟叶片茄酮含量最主要的决策因素,而土壤有机质是烤烟叶片茄酮含量最主要的限制因素。

Through the methods of stepwise regression analysis, partial correlation analysis and path analysis, 45 tested data of samples of soil and tobacco leaf from 5 tobacco-planting areas in Xuchang of Henan were used to study quantitative relationship between chemical properties of soil and contents of Solanone in flue-cured tobacco leaves. The results indicated that the soil chemical properties of soil organic matter content,total nitrogen content, total potassium content, available nitrogen content, CEC, total aluminum, total magnesium and total sodium were the main factors which affected the contents of solanone in flue-cured tobacco leaves.These factors together controlled about 98.87% of the changes of solanone content in flue-cured tobacco leaves. Soil organic content was the key factor with a positive effect. Both available nitrogen content and CEC in soil had negative effects on the contents of solanone. The available nitrogen content was the main factor promoting the content of solanone, while the soil organic matter content was the main factor limiting the contents of solanone in flue-cured tobacco leaves.