Plant Soil Environ., 2006, 52(3):130-137 | DOI: 10.17221/3356-PSE

Effect of co-inoculation with phosphate and potassium solubilizing bacteria on mineral uptáme and growth of pepper and cucumber

H.S. Han1, Supanjani2, Lee K.D.2
1 Department of Biology, Suncheon National University, Jeonnam, Korea
2 Department of Plant Science, McGill University, MacDonald Campus, Quebec, Canada

Biofertilizers have been used as sources to improve plant nutrients in sustainable agriculture. Experiments were conducted to evaluate the potential of phosphate solubilizing bacteria (PSB) Bacillus megaterium var. phosphaticum and potassium solubilizing bacteria (KSB) Bacillus mucilaginosus inoculated in nutrient limited soil planted with pepper and cucumber. Results showed that rock P and K applied either singly or in combination did not significantly enhance soil availability of P and K, indicating their unsuitability for direct application. PSB was a more potent P-solubilizer than KSB, and co-inoculation of PSB and KSB resulted in consistently higher P and K availability than in the control without bacterial inoculum and without rock material fertilizer. Integrated rock P with inoculation of PSB increased the availability of P and K in soil, the uptake of N, P and K by shoot and root, and the growth of pepper and cucumber. Similar but less pronounced results were obtained when rock K and KSB were added concomitantly. Combined together, rock materials and both bacterial strains consistently increased further mineral availability, uptake and plant growth of pepper and cucumber, suggesting its potential use as fertilizer.

Keywords: pepper; cucumber; phosphate solubilizing bacteria; potassium solubilizing bacteria

Published: March 31, 2006  Show citation

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Han HS, Supanjani, Lee KD. Effect of co-inoculation with phosphate and potassium solubilizing bacteria on mineral uptáme and growth of pepper and cucumber. Plant Soil Environ. 2006;52(3):130-137. doi: 10.17221/3356-PSE.
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