Phosphate Solubilizing Bacteria Adaptive to Vinasse


  • Kahar Muzakhar Biology Dept., Faculty of Mathematic and Natural Sciences, The University of Jember, Jl. Kalimantan 37, Jember 68121
  • Sutoyo Sutoyo Biology Dept., Faculty of Mathematic and Natural Sciences, The University of Jember, Jl. Kalimantan 37, Jember 68121
  • Ahmad Bukhari Saragih Biology Dept., Faculty of Mathematic and Natural Sciences, The University of Jember, Jl. Kalimantan 37, Jember 68121



bacillus, biofertilizer, Gram negative, PSB, vinasse.


Microorganisms identified as phosphate solubilizing bacteria (PSB) adaptive to vinasse were successfully screened from sugarcane soil from an agriculatural estate in Jatiroto. By conducting a screening on Pikovskaya's agar medium (PAM), we found that five different isolates were detected as PSB (pvk-5a, pvk-5b, pvk-6b, pvk-7a, and pvk-8a). Of the five isolates only three could be grown and were found to be adaptive to vinasse based medium without any nutrients added (pvk-5a, pvk-5b and pvk-7a). The three isolates were characterized as coccus and Gram negative with no endospores detected. We suggest that these three isolates can be used as biofertilizer agent to support organic farming.


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