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针对川南烟区烤烟生产存在的问题,通过烟区的生产调查和取样(土壤和烟叶)分析,并在代表性土壤——山地黄壤上设置烤烟中微肥肥效试验,研究中微量元素(镁、硼、钼)对烟叶产量、质量及其化学成分的影响.结果表明:配施镁肥,产量增加4.2％ ～5.5％,上等烟增加2.67～3.52个百分点,产值增加13.30％～15.95％;配施硼肥,上等烟提高5.69个百分点,配施钼肥,产值提高5.68％;镁、硼肥混施有相互抑制的作用,中微肥(镁、硼、钼)施用对烟叶化学成分有一定的影响,川南烟区山地黄壤生产优质烤烟最可行的模式是在氮、磷、钾肥施用的基础上,配施镁肥(钙镁磷肥代替镁肥更佳).硼肥和钼肥应视土壤情况施用.“,”The effect of the middle-micro-element (Mg、B、Mo) fertilizer on the yield,quality,and chemistry composition of the tobacco leaf were studied.The results indicated that the yield could be increased by 4.2％ to 5.5 ％,the ratio of high-grade tobacco leaf could be increased by 2.67 to 3.65 percent points and the output value could be increased 13.30％ to 15.95％ by adding Mg.The ratio of high-grade tobacco leaf could be increased 5.68％ by adding Mo.The effect of this kind of fertilizations was somehow discounted by usingthe mixture fertilizer of Mg and B.The chemical composition of tobacco was influenced in a certain range by using the middle-micro-element fertilizer.The best model of using fertilizer for getting high-grade tobacco leaf was suggested.