Factors determining rock phosphate solubilization by microorganisms isolated from soil

✍ Scribed by E. Nahas

• Book ID: 104723692
• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 435 KB
• Volume: 12
• Category: Article
• ISSN: 1573-0972
• DOI: 10.1007/bf00327716

✦ Synopsis

Forty two soil isolates (31 bacteria and 11 fungi) were studied for their ability to solubilize rock phosphate and calcium phosphate in culture medium. Eight bacteria and 8 fungi possessed solubilizing ability. Pseudomonas cepacia and Penicillium purpurogenum showed the highest activity. There was a correlation between final pH value and titratable acidity (r=-0.29 to -0.87) and between titratable acidity and soluble phosphate (r=0.22 to 0.99). Correlation values were functions of insoluble phosphate and of the group of microorganisms considered. A high correlation was observed between final pH and soluble phosphate only for the rock phosphates inoculated with the highest concentration of solubilizing bacteria (r=-0.73 to -0.98).