贵州烟区烤烟钾、氯元素含量的变异分析

Variance Analysis on Contents of Potassium,Chlorine of Flue-cured Tobacco Leaves in Guizhou Tobacco-growing Areas

本文分析了2009～2012年贵州省不同产区、品种、年份、部位烤烟样品中钾、氯含量的变异特点及原因。结果表明贵州烤烟平均钾含量1.87%、氯含量0.21%,均略偏低,但钾氯比值达到12.56,表明燃烧性较好;钾、氯含量及钾氯比值存在广泛的变异,其变异系数分别为27.9%、60.6%和、138.5%,整体变异程度较大;影响贵州烤烟钾含量差异大小的因素依次为部位〉年份〉品种〉产区,影响氯含量差异大小的因素依次为部位〉产区〉年份〉品种,且各因素对钾、氯含量间的差异均达到极显著水平,说明贵州烟区各区域间因土壤条件不尽相同、烟叶品种各异、在气候条件如日照数及降雨量变化较大的情况下,不同地区应采用不同施肥管理方法。

The contents of potassium and chlorine, as well as the causes of their variations of flue - cured tobacco leaves sampled from different tobacco - growing areas, different varieties, different years and different stalk positions of Guizhou Province during 2009 - 2012, were analyzed in the present study. The results indi- cated that the average contents of potassium and chlorine were 1.87% and 0. 21% , respectively, and the ratio of potassium to chloride was 12.56, reflecting good flammability. The variations of contents of potassium and chlorine, as well as ratio of potassium to chlorine were obvious, and the coefficients of variation were 27.9% , 60. 6% , and 138.5% ,respectively. The order of factors affecting potassium contents was stalk posi- tion 〉 years 〉 varieties 〉 areas, and that affecting chlorine content was stalk position 〉 areas 〉 years 〉 then varieties. Further, all the tested factors caused the extremely significant differences in the contents of potassium and chlorine, which might be ascribed to the differences in the soil conditions, varieties, as well as climate factors including sunshine and precipitation. It indicated that fertilizer application system should be suitable for specialized tobacco- growing area.