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

PurposeIn order to solve the inadequate supply problem of phosphorus and potassium in tobacco planting soil, the effect of increasing application of different ratios between phosphate-solubilizing bacteria and potassium-solubilizing bacteria fertilizer on the growth and development of flue-cured tobacco, and the enzyme activity in the rhizospheric soil were studied.

MethodFour treatments including application of phosphate-solubilizing bacteria fertilizer (T1), application of potassium-solubilizing bacteria fertilizer (T2), mix application of phosphate-solubilizing bacteria and potassium-solubilizing bacteria fertilizer (T3), and no application of bio-fertilizer (CK) were applied in Shilin County to test their effects on the yield and quality of flue-cured tobacco, and the enzyme activity in the rhizospheric soil at mature stag of flue-cured tobacco.

Results(1) The application of biological bacterial fertilizer, especially the mixed application of phosphate-dissolving bacteria and potassium-dissolving bacteria, increased the yield and output value by 6.1% and 15.1%, respectively, which promoted the growth and development of tobacco plants and significantly improved the economic benefits. (2) Biological bacterial fertilizer could improve the chemical composition of tobacco leaves, and the content of reducing sugar and potassium in tobacco leaves increased by 35.8% and 53.7%, respectively. (3) The combined application of potassium-dissolving bacteria and phosphate-dissolving bacteria increased the activities of soil hydroxase, urease, invertase and acid phosphatase by 40.2%, 95.6%, 119.4% and 29.0%, respectively.

ConclusionIt is one of the effective ways to improve the nutrition of tobacco plant, promote growth and development, and increase the supply of phosphorus and potassium.