关键词: 烟草;钾素平衡;钾含量;吸收;分配

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