关键词: 外源有机酸, 生理, 速效钾, 烟草

Abstract: In order to improve the potassium content and quality of tobacco plants, this paper applied walic acid and citric acid on pot cultured tobacco varieties to analyze their effects on leaves potassium content, soil available potassium content, and flue-tobacco physiological characters. The results showed that the leaves potassium content, chlorophyll content, root system activity and soil available potassium content treated with organic acids were all higher than contrast, but the catalase activity of tobacco plant was lower than that of the contrast. Malic acid could increase the soil available potassium content, leave potassium content, chlorophyll content, leave catalase activity, leave peroxidase activity, MDA content, root system catalase activity, and root peroxidase activity; while the root system activity, leave and root superoxide dismutase activity, and root MDA content treated with citric acid were higher than those treated with malic acid. These results provided reference for field tobacco leaf production.

Key words: exogenous organic acids, physiology, available potassium, tobacco