重庆市彭水烤烟化学成分及协调性时间变异特征分析

Analysis on Time Variance Characteristic for Chemical Composition and Coordination of Flue-cured Tobacco Leaf in Pengshui County of Chongqing City

[目的]获得重庆市彭水县烟叶品质质量的时间变异特征。[方法]对重庆市彭水县2007～2010年连续4年的烤烟上部叶(B2F)、中部叶(C3F)、下部叶(X2F)的化学成分及其协调性指标进行分析。[结果]在连续4年的烟叶生产中,彭水县烟叶氯含量的变异系数上部叶、中部叶和下部叶均大于30%,其他化学成分含量基本保持稳定,在表征化学成分协调性的各项指标中,钾氯比的变异系数上部叶、中部叶和下部叶均大于30%,两糖比、钾氯比、糖碱比基本稳定。[结论]重庆市彭水县烟叶除氯含量及钾氯比指标外,其他指标基本稳定,应通过肥水管理调整烟叶氯含量,使烟叶化学组分更为稳定和协调。

[ Objective ] The study aimed to obtain the time variation characteristics for the quality of tobacco leaf in Pengshui County. [ Meth- od] The chemical compositions and their coordination indicators for 3 groups of upper leaf（B2F） , middle leaf （C3F） and lower leaf （X2F） in the flue-cured tobacco in the successive 4 years from 2007 to 2010 in Pengshui County, Chongqing City were analyzed. [ Result] In the to- bacco leaf production for the successive 4 years, the coefficients of variation of the chlorine content in the upper, middle and lower leaves ot the .tobacco in Pengshui County were all more than 30%, and the contents of other chemical compositions kept stable basically. In the various indexes that characterized the chemical compositions coordination, the variation coefficients of the potassium -chlorine ratio in the upper, mid- dle and lower leaves were all more than 30% , and that of two sugar ratio and sugar-alkali ratio kept stable basically. [ Conclusion] In addition to the indicators of chlorine content and the potassium-chloride ratio in the tobacco in Pengshui County, other indicators were stable basically. So, it should adjust the chlorine content in the tobacco leaf through the fertilizer-water management to make the chemical compositions in the tobacco leaf more stable and harmonious.