Abstract: In order to determine the effects of autochthonous propagation agent and phosphate- and potassium- solubilizing bacteria on the growth, yield and quality of tobacco, a field experiment were designed. The results showed that compared with CK （conventional fertilization）, there was no significant differences of agronomical traits, incidence of viral diseases and disease index treated with T1 （conventional fertilization+indigenous bacteria expanding agent + soil solubilizing phosphate and potassium releasing microbial inoculum） and T2 （conventional fertilization+indigenous bacteria multiplication agent） in the cluster stage. In the topping stage, for T1 and T2, the maximum leaf length increased by 11.06% and 10.83%, the maximum leaf width increased by 15.02% and 20.25%, and the maximum leaf area increased by 27.75% and 33.27%, respectively. While incidence of black tibia decreased by 55.6% and 44.4%, and the disease index decreased by 57.6% and 33.4%, respectively. In terms of economic characters, the yield of T1 and T2 treatment increased by 10.10% and 9.92%, the output value increased by 23.06% and 21.09%, respectively. In conclusion, the application of autochthonous propagation agent and phosphate- and potassium-solubilizing bacteria were beneficial to improve agronomic traits of tobacco plant in the topping stage, improve resistance to root black rot and improve economic traits of tobacco plant, and the application of autochthonous propagation agent and soil phosphate- and potassium- solubilizing bacteria was more effective.

Key words: flue-cured tobacco, autochthonous propagation agent, phosphate- and potassium-solubilizing bacteria, agronomic traits, yield and quality