Isolasi, Populasi Dan Karakterisasi Bakteri Pelarut Fosfat Pada Daerah Perakaran Dan Tanah Dari Bengkulu, Sumatra

Abstract

The research was conducted in order to know the isolation, population and characterizations of phosphate solubilizing bacteria on the soil from rhizosphere plants from Bengkulu, Sumatra. The purpose of the study to know the population of phosphate solubilizing bacteria from rhizosphere plants, and the get pure culture. The sample wastaken from 25 sample soil from rhizosphere of plants. Isolation was done with dilution methods in standard medium Pycosvkaya, the inculation at (27-280C) after 15 days, and the population with plate count methods. The population of phosphate solubilizing bacteria was in the range of 13-101 X 105 CFU/g soil, and the highest population wasfound from the sample soil from rhizoaphere with Semangka (Citrulus lanatus) plant. Seventy five gave of pure culture. The growth characteristic of pure culture was observed by using Pycosvkaya medium. Incubation at (27-280C) after 15 days. The clear zone surround the colonies indicate that the phosphate in the medium was hydrolyzed and the formed zone from two days until eight day