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作 者 ：于建军,邵惠芳,刘艳芳,庞天河,陈红丽,代惠娟,马新明*

期 刊 ：生态学报 2009年 29卷 4期 页码：1668~1674

关键词：烤烟；巨豆三烯酮；生态因子；偏相关分析；通径分析；凉山；

Keywords:Flue-cured tobacco, megastigmatrienones, ecosystem factors, partial correlation analysis, path analysis, Liangshan,

摘 要 ：基于四川省凉山州9个烟叶主产区土壤与烟叶各81个样品的实验室测试数据，应用逐步回归分析、偏相关分析和通径分析方法，研究了生态因子与烤烟叶片中巨豆三烯酮含量的数量关系，结果表明，月平均气温、月平均降雨量、≥20℃积温、土壤有机质、土壤水解氮、土壤速效钾和土壤pH值是影响烤烟烟叶巨豆三烯酮含量的主要生态因子，彼此互相关联，共同决定了烤烟叶片巨豆三烯酮含量变化的98.02%。对烤烟叶片巨豆三烯酮含量直接影响最大的是月平均降雨量，其次是土壤有机质、月平均气温、≥20℃积温、土壤速效钾、土壤pH值和土壤水解氮，其中月平均降雨量对烤烟叶片巨豆三烯酮含量产生直接的负面效应，而土壤有机质、月平均气温则对烤烟叶片巨豆三烯酮含量产生直接的正面效应。土壤有机质是烤烟叶片巨豆三烯酮含量最主要的促进因素，而≥20℃积温是烤烟叶片巨豆三烯酮含量最主要的限制因素。

Abstract:The quantitative relationships between the ecosystem factors and the contents of megastigmatrienones were studied by partial correlation analysis, path analysis and stepwise regression analysis methods. The experiments were conducted in 9 tobacco-growing areas distributed at Yanbian, Xichang, Dechang, Huili, Huidong, Ningnan, Puge, Mianning and Yuexi counties (cities) of Liangshan region, and the soil samples were taken from the representative land pieces of each county (city) before fertilizing the lands and before transplanting tobacco in order to avoid the raining season. The meteorological data used, such as temperature, rainfall and sunlight illumination were from the Sichuan Meteorological Administration. Eighty-one tobacco samples, including three grades of official tobacco standard GB2635-92, lugs(X2F)、cutters(C3F) and leaf (B2F) from the main strains (Honghua Dajinyuan and Yunyan 87) of each county (city), were taken with each sample weighing 5.0 kg. The standard methods in literatures were used to measure pH values, organic contents, contents of hydrolytic nitrogen, contents of all phosphorus elements, contents of quick-acting phosphorus, contents of quick-acting potassium, contents of all potassium elements in soils and contents of megastigmatrienones in flue-cured tobacco leaves. The results indicated that the ecosystem factors of the monthly mean temperature, the monthly mean amount of rainfall, the Accumulated temperature (≥20℃), the soil organic content, hydrolytic nitrogen content, quick-acting potassium content and the pH value, played determinant rules in the contents of megastigmatrienones in flue-cured tobacco leaves. These factors were not independent in their effects, and controlled about 98.02% of the changes of megastigmatrienones content in flue-cured tobacco leaves. The key ecosystem factor controlling the contents of megastigmatrienones in flue-cured tobacco leaves was the monthly mean amount of rainfall, and its effect was negative. Both the organic content in soil and the monthly mean temperature had positive effects on the contents of megastigmatrienones. The organic content was the main factor promoting the content of megastigmatrienones while the accumulated temperature (≥20℃) was the main factor limiting the contents of megastigmatrienones in flue-cured tobacco leaves.

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