Effect of co-inoculation with phosphate and potassium solubilizing bacteria on mineral uptake and growth of pepper and cucumber
Han, H.S.(Suncheon National Univ., Jeonnam (Korea Republic)) | Supanjani(McGill Univ., Ste-Anne-de-Bellevue (Canada). Dept. of Plant Science) | Lee, K.D.(McGill Univ., Ste-Anne-de-Bellevue (Canada). Dept. of Plant Science)E-mail:[email protected]
The effect of phosphate solubilizing bacteria (PSB) Bacillus megaterium var. phosphaticum and potassium solubilizing bacteria (KSB) Bacillus mucilaginosus in nutrient limited soil planted with pepper and cucumber was evaluated. Rock P and K applied either singly or in combination did not significantly enhance soil availability of P and K. 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. Rock P with inoculation of PSB increased the availability of P and K, the uptake of N, P and K by shoots and roots, and the growth of both 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, suggesting their potential use as fertilizer.
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