关键词: 解钾菌TK35, 烟草, 生长, 钾素吸收, 产质量, 经济性状

Abstract: A tobacco-affinity potassium-solubilizing bacterial strain TK35, obtained from tobacco rhizosphere in the early research, was applied to estimate its effects on growth, potassium uptake, yield and quality of tobacco leaves through pot and field experiments. The results of the pot experiment showed that, compared with the control without bacteria application, the fresh weight, dry weight, potassium content of leaves and available potassium content in the rhizosphere soil of tobacco plants treated with TK35 bacterial liquid increased by 13.89%, 11.97%, 11.46% and 4.92%, respectively. The results of the field experiment showed that the application of TK35 and 80% potash fertilizer treatment had the best effects. Compared with the treatment without bacterial solution and applying total fertilizer (CK2), the potassium content of middle leaves and upper leaves under this treatment increased by 14.64% and 35.97%, and the proportion of middle tobacco leaves, the proportion of superior tobacco leaves, yield and output value under this treatment increased by 8.33%, 3.20%, 3.83% and 5.35%, respectively. Potassium-solubilizing bacterium TK35 could increase the available potassium content of tobacco rhizosphere soil, improve the potassium content of tobacco leaves, promote the growth of tobacco plants, effectively enhance the yield and quality of tobacco leaves, and increase the economic value of tobacco. Strain TK35 had the potential for development and application.

Key words: potassium-solubilizing bacteria TK35, tobacco, growth, potassium uptake, yield and quality, economic character