【摘要】 对云南五种植烟土壤上烤烟三个品种、六个生育期烟叶中钾、磷、硫、钙、镁、铁、锰、锌、铜、硼浓度和烟株根区土壤中ＡＢ／Ｄ联合提取的养分含量及土壤ｐＨ、有机质和碱解氮的测试数据，用主组分分析（ＰＣＡ）方法，讨论土壤─烤烟系统矿质营养元素的相互关系及交互作用。结果显示：①烟叶矿质营养元素浓度随烤烟生育期有规律的变化，受根区土壤化学性质影响的变异大于品种间的差异；②烟叶钾、磷、铜、硼表现明显的稀释效应，钙、镁表现积累效应；③烤烟钾、磷、铜、硼营养存在相互协同作用，钙对钾、磷、铜、硼营养有明显的拮抗作用。④增加土壤有机质，利用钾、磷、铜、硼的协同作用，减轻钙对钾、磷、硼的拮抗是改善烤烟营养，提高烤烟产量品质的关键之一。更多还原

【Abstract】 This paper deals with the interrelations and interactions of mineral nutritive elements in the soils and flue-cured tobacco system. Samples come from five typical tobacco- growing soils-plateau red soil, red calcareous soil, alluvial red soil, yellow soil and purple soil, and three varieties of tobacco-K326, Hongda and Nc82, at six growing stages. The concetrations of K, P, S, Ca, Mg, Fe, Mn, Zn, Cu and B in the leaves and the nutrient contents extracted by AB/D multiple-elements extraction procedure, and PH, content of organic matter and hydrolyzable nitrogen within the root zone soil were investigated. Principal component analysis was performed using Sirius chemometrics software. The results indicated that: i) the change in concentration of nutrients in the leaves follows a regular pattern, and the variations in chemical properties of the root zone soil are more than that between the different varieties. ii) The nutrient concentrations in the leaves are dilution effect for K, P, B, Cu, and accumulation effect for Ca. iii) there is a mutual synergism among K, P, Cu and B, and an antagonism of Ca to the others in the flue-cured tobacco nutrition. iv) The key to improvement of nutrition, yield and quality of flue-cured tobacco lies in increasing organic matter content in soil and making use of the synergism of K, P,Cu and B to counteract antagonism of Ca to K, P, Cu and B.更多还原