alexa Brief In Vitro Analysis on Improvement of Available Pho
ISSN: 1948-5948

Journal of Microbial & Biochemical Technology
Open Access

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Research Article

Brief In Vitro Analysis on Improvement of Available Phosphorous In Low Soluble Eppawala Rock Phosphate

Hettiarchchi RHAN* and Walpola BC


Department of Soil Science, University of Ruhuna, Sri Lanka

*Corresponding Author:
Rhan H
Department of Soil Science
University of Ruhuna, Sri Lanka
Tel: 041-2222681/2222682
Fax: 041-2227001
E-mail: [email protected]

Received date: May 16, 2017; Accepted date: May 31, 2017; Published date: June 07, 2017

Citation: Hettiarchchi RHAN, Walpola BC (2017) Brief In Vitro Analysis on Improvement of Available Phosphorous In Low Soluble Eppawala Rock Phosphate. J Microb Biochem Technol 9:105-108. doi:10.4172/1948-5948.1000351

Copyright: © 2017 Rhan H, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Rock Phosphate (RP) is any naturally occurring geological material that contains one or more phosphate minerals suitable for commercial use. There is a major RP deposit in Eppawala, Sri Lanka and this RP identify as Eppawala Rock Phosphate (ERP). Large proportion of soluble inorganic phosphate added to soil is rapidly fixed as insoluble forms soon after application. Development of an economical and environmentally friendly alternative for successful soil P management is major concern in crop production and Phosphate Solubilizing Microorganism (PSM) attracted attention in this regard. This study was conducted to identify the Phosphorus solubilizing bacteria. Soil samples were collected from different Agricultural crop lands. Soil were Spread cultured in NBRIP medium after a serial dilution. The bacterial colonies that produced clear zone of activity were considered as potential phosphate solubilizes. They were sub-cultured for the further purification. The experiment has been carried out adding 28% P2O5 containing Eppawala Rock Phosphate with NBRIP medium. Bacterial growth in 660 wave length by using shimadzu UV spectrophotometer, P solubilization, and pH were measured respectively 1, 3, 5 and 7 days after inoculation. Clear zone producing bacteria in phosphate enriched medium has been selected as P solubilizing bacteria with time period all bacterial strains has shown improvement of solubilized P in the culture media. Among them PSB-7 strain has shown a vigorous growth and maximum P Solubilization 237.61 ppm in vitro during experiment. Despite of environment unfriendly chemical solubilization methods of naturally existing Rock Phosphate this biological solubilization generate maximum amount of plant available phosphorous.


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