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本文首先分析了国内外烟草低焦油育种进展缓慢的原因，进而探讨焦油产生量和烟叶无机养分含量之间的关系，认为在无机养分中，钾对烟叶焦油产生量的影响最大。根据作物矿质营养性状遗传改良原理，认为培育富钾烟草品种可提高我国烟叶含钾量，从而达到烟叶降焦的目的，并能提高烟株抗逆、抗病性，改善烟叶品质，一举多得，实为低焦油育种的一条新途径，值得重视和发展。
In this paper, the reasons for the slow progress of low tar tobacco breeding at home and abroad were analyzed. Then the relationship between tar yield and inorganic nutrient content in tobacco leaves was analyzed. It was found that potassium had the greatest effect on the tar yield of tobacco leaves in inorganic nutrients. According to the principle of genetic improvement of nutritional traits of crops, it is considered that cultivating potassium-enriched tobacco varieties can increase the potassium content of tobacco in our country so as to achieve the purpose of reducing the scorch of tobacco leaves and improve the resistance and disease resistance of tobacco plants and improve the quality of tobacco leaves. , In fact, a new way of low tar breeding, it is worth attention and development.