福建主要烟区土壤、烟叶Ｍｇ、Ｂ含量测定的结果表明，植烟土壤的交换性Ｍｇ含量主要分布在０．２～０．５ｃｍｏｌｋｇ－１，烟叶含Ｍｇ量平均为０．１８％，土壤有效Ｂ含量平均为０．２２ｍｇｋｇ－１，烟叶有效Ｂ含量平均为１１．０５ｍｇｋｇ－１．绝大多数土壤，烟叶都存在着不同程度的缺Ｍｇ、缺Ｂ状况．按每公顷施ＭｇＳＯ４２２５ｋｇ，喷施０．１％硼砂溶液１１２５ｋｇ，可以提高烟叶Ｍｇ、Ｂ含量，增加中上部叶片的单叶重，提高烟叶的产量和品质 The results of determination of Mg and B contents in main tobacco growing areas in Fujian Province showed that the exchangeable Mg content of tobacco planting soil mainly distributed in 0.2-0.5cmolkg-1, the average content of Mg in tobacco leaf was 0.18%, and the soil was effective The content of B was 0.22mgkg-1 on average, and the average effective B content of tobacco was 11.05mgkg-1. Most of the soil, tobacco leaves there is varying degrees of lack of Mg, lack of B status. Applying MgSO44225kg per hectare and spraying 1125kg of 0.1% borax solution can increase the content of Mg and B in the leaves, increase the single leaf weight of middle and upper leaves, and increase the yield and quality of tobacco leaves