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于2007年在湖南省3个典型植烟生态区代表地(湘西北桑植县、湘中浏阳市、湘南永州市)分别同时进行大田本土栽培、客土与本土单独盆栽试验,检测烤烟K326收获期各处理中部烟叶杀青样品的烟碱含量,研究湖南不同烟区烤烟烟碱含量差异的主要生态原因.结果表明:湖南不同烟区大田本土正常栽培烤烟的平均烟碱含量存在显著差异,其中以桑植烟区所产烟叶烟碱含量最高,其次是浏阳烟区,永州烟区最低.盆栽试验结果表明,气候对湖南烟区烤烟烟碱含量有显著影响,土壤及其与气候的互作对湖南烟区烤烟烟碱含量的影响有限.气候、土壤及两者互作对湖南烟区烤烟烟碱含量变异的贡献率依次为60.0%、12.8%和27.2%.与湖南烟区烤烟烟碱含量关联度较大的主要亚生态因子依次为:成熟期的云量和伸根期的相对湿度、日照时数、昼夜温差、降雨量以及旺长期的平均气温.综合分析表明,气候是导致湖南烟区烤烟烟碱含量差异的主要生态因素.
In 2007, three typical tobacco planting eco-regions in Hunan Province (Sangzhi County in western and northern Hunan, Liuyang City in Hunan Province, Yongzhou City in southern Hunan) were simultaneously cultivated in the field, soil and potted soil test alone to test the harvest of flue-cured tobacco K326 The results showed that the average nicotine content of flue-cured tobacco grown in different fields in Hunan Province was significantly different, among which, Tobacco production in Sangzhi tobacco area had the highest nicotine content, followed by that in Liuyang tobacco area and Yongzhou tobacco area.The results of pot experiment showed that climate had a significant effect on the nicotine content of flue-cured tobacco in Hunan tobacco field, and soil and its interaction with climate on Hunan The nicotine content of flue-cured tobacco in tobacco-growing areas had a limited influence on the nicotine content in flue-cured tobacco in Hunan, with the contribution rates of 60.0%, 12.8% and 27.2%, respectively. The major sub-ecological factors are as follows: the cloudiness at maturity and the relative humidity at the rooting, the sunshine duration, the temperature difference between day and night, the rainfall and the mean temperature in the long term. Analysis shows that climate is the main ecological factor that causes the difference of nicotine content in flue-cured tobacco in Hunan tobacco area.