The Effects of Salicylic Acid and Microbial Agents on the Growth of Flue-cured Tobacco in Continuous Cropping Obstacle Fields
To explore effective methods for solving continuous cropping obstacles in tobacco,salicylic acid and three microbial agents were selected to conduct field group experiments in continuous cropping obstacle fields.The results showed that the application of salicylic acid resulted in the highest plant height,stem circumference,maximum waist leaf length,maximum waist leaf width,and maximum waist leaf area.The application of Streptomyces spectacularis 69-1 resulted in the highest number of leaves,while stem circumference,maximum waist leaf width,and maximum waist leaf area were second only to salicylic acid.The application of salicylic acid resulted in the highest weight,yield per unit area,and output value per unit area of the louver,while the application of Streptomyces spectacularis 69-1 resulted in the highest proportion and average price of high-grade tobacco.The combination of salicylic acid and three microbial agents did not show a synergistic effect on promoting growth and improving yield and quality.Salicylic acid and Streptomyces spectacularis 69-1 can significantly promote tobacco growth and improve tobacco yield and quality.It is recommended to further expand the application area in tobacco areas with continuous cropping obstacles.
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