烤烟矿质营养分布的因子分析

为了研究烤烟的B营养及B K交互作用 ,进行了烤烟生长期间不同施K、施B肥的盆栽试验。在两个生育期测定根、叶不同部位 1 0种矿质营养元素含量 ,并对试验结果作了因子分析和方差分析。分析结果表明 ,一个四因子模型解释了试验数据总方差的 92.1% ,10种矿质元素划分为有确切意义的公因子微量元素营养因子、常量元素营养因子、磷因子和硼因子。矿质营养分布方式主要受植株部位、施K量及两者交互效应的显著影响。根部有较高的微量元素浓度分布 ,叶部有较高的常量元素浓度分布。多施K肥可适当提高烟叶含K量 ,也可抑制叶片中的Ca、Mg、S含量 ,减小P营养。K充足时 ,多施B肥有可能增加根部微量元素营养。高B、高K会影响植株对P、B的吸收。

Factor analysis of mineral elements distribution of flue-cured tobacco

A pot experiment was carried out for flue cured tobacco in growth period at different levels of K and B fertilizers to study B nutrition and B K interaction Factor analysis was used to exploit the correlation structure present in the experimental data set containing 10 mineral nutrient elements in roots and leaves of flue cured tobacco in two growth periods The results showed: 1)A four factor model accounts for 92.1% of the total variation in the data The 10 elements are grouped in significant factors, that is, trace element factor, ordinary element factor, phosphorus factor and boron factor 2)The mineral nutrients distribution changes followed as locations, amounts of potassium fertilizer and their double effect There is a higher concentration distribution for Fe, Cu, Zn, Mn and B in roots ,while a higher concentration distribution for K, Ca, Mg, S and P in leaves 3)Adding amount of K fertilizer can increase proper K in leaf, inhibit Ca, Mg and S, and decrease P in leaves Adding amount of B fertilizer under a higher K level could increase the trace element nutrients in roots, however, the absorption of both P and B nutrients of tobacco would be affected by the higher K and B fertilizer levels