Populasi, Kompatibilitas, Dan Aktivitas Enzim Bakteri Pelarut Fosfat Yang Diisolasi Dari Beberapa Tipe Ekosistem Di Bali

The research activities of isolation, population, compatibility test, salinity test, and Phosphomonoesterase of phosphate solubilizing bacteria isolated from several ecosystem types have been carried out. The research aimed to investigate the potential role of PSB as a plant growth promoter in coastal ecosystem, low temperature, and extreme environmental conditions. The treatments were arranged in Randomized Complete Design (RCD) with 3 replications for: The population of PSB, the salinity test of PSB, the compatibility between BPF and Rhizobium, the qualitative ability test of PSB, the quantitative ability test of PSB, the pH analysis of PSB in liquid inoculants, and the PME ase acid and base activity of PSB in liquid inoculants. The result showed that phosphate solubilizing bacteria isolated from dry and wet ecosystems are potential organisms to enhance the organic farming in the highly saline areas. The highest bacterial population (1,5x107CFUg-1), tolerant to grow at 3 persen NaCl, and compatible with Rhizobium were encountered in the rhizosphere of Salacca zalacca. Several important PSB strains were found in this rhizosphere that are able to solubilize calcium phosphate up to 473,920 mg.l-1 with pH 3,65 after 8 days incubation. Phosphate solubilizing capacity was the highest in Ca-P medium. Strain No. 1 has the highest Phosphomonoesterase acid and base activities about 1,21 µgNP.g-1.h-1 and 0,206 µg.g-1.h-1. Berkala Penelitian Hayati (Journal of Biological Researches). Edisi khusus No. 4C. 2011. P: 43-50.