The Effects of Different Ratios between Phosphate-solubilizing Bacteria and Potassium-solubilizing Bacteria Fertilizers on the Flue-cured Tobacco Growth and the Enzyme Activities in the Rhizospheric Soil

• Xiaoqian LIU, 
• Xingrong DU, 
• Yujiao TAN, 
• Qi LUO, 
• Na WANG