不同烤烟基因型大田期矿质元素含量的因子分析*

 对延边烟区6个烤烟基因型不同时期、不同部位烟叶的P，K，Ca，Mg，Zn，Fe，B，Mn 8种矿质元素进行测试，并对测试结果做因子分析。结果表明：（1）8种矿质元素建立的一个4因子模型解释了数据总方差的85.715%，并被划分为4个有确切意义的公因子——常量元素营养因子、大量元素营养因子、B因子、Zn因子。（2）常量元素、大量元素和B元素的分配方式受移栽后天数、部位、基因型的显著影响。移栽后50d各基因型中部和上部叶有较高的大量元素分布,移栽后70d各基因型下部叶有较高的常量元素分布,各基因型B因子的浓度在移栽后50～90d逐渐上升。移栽后50～90d内烤烟9407和吉烟9号叶片中P，K，Ca，Fe，Mg，Mn，B含量较高，NC89，中烟98，中烟100 P,K的含量较低。

Factor Analysis on Mineral Nutrition Contents of Different Flue-cured Tobacco Genotypes at the Growth Stage

Using the factor analysis method, 8 mineral nutrient elements（P, K, Ca, Mg, Zn, Fe, B, Mn） in the flue cured tobacco leaves with 6 genotypes were tested at different growth stage and position in Yanbian area. The results showed that (1) a 4-factor model established by 8 kind of mineral substances explained 8572% of the total variation, and the 8 elements were divided into 4 significant factors, including ordinary element factor, major element factor, boron factor and zinc factor. (2) The distribution mode of the ordinary element factor, the major element factor and the boron factor was remarkably affected by locations, days after planting and genotypes. There were many major elements accumulated in the middle and upper leaves after transplanting for 50 days, and the ordinary elements highly concentrated in lower leaves after transplanting for 70 days, the concentration of the boron factor in different genotypes gradually increased from the 50th day to the 90th day after transplanting, meanwhile, the contents of mineral nutrient elements (P, K, Ca, Fe, Mg, Mn,B）were higher, and the contents of P and K in NC89, Zhongyan98 and Zhongyan100 were lower.