Abstract:

Potassium is an important mineral nutrient in tobacco plant, which is closely related to the quality of tobacco leaves. Compared with the high grade tobacco in international market, the quality of tobacco made in China is lower, and one of the important reasons is the lower potassium content in tobacco leaves. Therefore, studies on tobacco potassium nutrition become one of the major concerns in agricultural science and technology. This paper expounds the actuality of studies on tobacco potassium nutrition in China from the aspects of potassium balance in tobacco production, spatial and temporal variation characteristics in potassium contents of tobacco leaves, factors influencing potassium content in tobacco leaves, and potassium uptake and distribution in tobacco plants, etc.. The paper also briefly analyzes  the reasons for the uneven effects of improvement measures, and discusses the inadequacy and theoretical gaps in current studies on tobacco potassium nutrition.

Key words: tobacco, potassium balance, potassium content, uptake, distribution

摘要：

钾是烟草体内最重要的矿质营养，与烟叶品质密切相关。烟叶钾含量偏低是我国烟叶与国际优质烟叶品质差异的重要原因之一。烟草钾素营养研究成为农业科技重要的关注点之一。从烟草生产的钾素平衡状况、烟叶钾含量的时空变化特征、烟叶钾含量的影响因素、烟草体内钾的吸收与分配等方面对我国目前烟草钾素营养研究进行了综述，并对目前烟草钾含量的改进措施效果不理想的原因进行了简要分析，对烟草钾素营养研究中存在的不足之处和理论空白进行了讨论。

关键词: 烟草;钾素平衡;钾含量;吸收;分配