Abstract: The effects of improving quality and efficiency of flue-cured tobacco were studied by adding different kinds of soil amendments （sepiolite, bentonite, diatomite, white marble） and lue-cured tobacco planted without soil modifiers. The results showed that the four soil modifiers had no significant effect on the growth period of tobacco leaves in field. In terms of agronomic characters, the growth of flue-cured tobacco treated with sepiolite was generally better than that of other treatments. The main diseases were climate spot weather fleck disease,brown spot disease and tobacco mosaic disease,and the incidence rate was close. The output value and yield of each treatment were different. The output value of diatomite treatment was higher than that of the control group by 9 832.65 yuan per hectare. The highest proportion of superior tobacco leaves was the treatment with sepiolite. The contents of chemical components treated with white marble and sepiolite were closer to that of high-quality tobacco leaves, and the tobacco quality was the best. Therefore, the application of sepiolite of 2 kg/m² in the tobacco planting soil can effectively improve the botanical characters of tobacco plants and the chemical quality of tobacco leaves, and the output value is also higher than that of the control group.

Key words: solid amendment, flue-cured tobacco, improve quality and efficiency