Abstract
The phosphate-solubilizing bacteria (PSB) were enumerated in 52 soil samples collected from agricultural areas at Baghdad. The results revealed that more than 90% of the samples were inhabited with indigenous PSB. The number varied and ranged from 0.012–28.4×104 cell g−1 soil. The correlations between PSB counts and electrical conductivity, available phosphorus, cation-exchange capacity, soil moisture, organic matter and pH were insignificant. Both abundance and numbers of PSB were more pronounced in descending order under vegetables, legumes, grasses, cereal and orchard trees.
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References
Alexander M 1977 Introduction to Soil Microbiology. 2nd edn. John Wiley, New York.
Al-Khateeb I K, Raihan M J and Asker S R 1986 Phase equilibria and kinetics of orthophosphate in some Iraqi soils. Soil Science 141, 31–37.
Chhonka P K and Taraedar J C 1984 Accumulation of phosphatases in soils. J. Indian Soc. Soil Sci. 32, 266–272.
Gupta R D, Bherdwaj K R, Morwan B C and Tripathi B R 1986 Occurrence of phosphate dissolving bacteria in soils of North-West Himalayas under varying biosequence and climosequence. J. Indian Soc. Soil Sci. 34, 498–504.
Louw H A and Webly D M 1959 A study of soil bacteria dissolving certin mineral phosphate fertilizers and related compounds. J. Appl. Bacteriol. 22, 227–233.
Marshall K C 1975 Clay mineralogy in relation to survival of soil bacteria Annu. Rev Phytopathol. 13, 357–373.
Olsen S R, Cde C V, Watanabe F S and Dean L A 1954 Estimation of available phosphorus in soils by extraction with sodium bicarbonate. Cire 939. USDA.
Stotzky G 1986 Influence of soil mineral colloids on metabolic processes, growth, adhesion, and ecology of microbes and viruses.In Interaction of Soil Minerals with Natural Organics and Microbes. Eds. P M Huang and M Schnitzer Soil Sci. Soc. America, Inc. Madison, Wisc. USA.
Subba-Rao N S 1982 Phosphate solubilization by soil microorganismsIn Advances in Agricultural Microbiology. Ed. N S Subba Rao. Butterworth Sci. London, Boston, Toronto.
USDA Salinity Laboratory Staff 1969 Diagnosis and Improvement of Saline and Alkali Soils. Handbook No. 60 USDA Washington.
Venkateswarlu B, Rao A V and Raina P 1984 Evaluation of phosphorus solubilisation by microoganisms isolated from Aridsoils. J. Indian Soc. Soil Sci. 32, 273–277.
Walkley A and Black I R 1934 An examination of Degtijareff method for determining soil organic matter and proposed modification of the chromic acid titration. Soil Science 37, 29–38.
Webly D M 1960 Evaluation of the plate technique in use for studying phosphate-dissolving microorganisms. 7th International Congress Soil Sci. Madison, Wisc., USA.
Yousef A N, Al-Nassiri A S, Al-Azawi S K and Abdel-Hussian N 1987 Abundance of Peanut rhizobia as affected by environmental conditions in Iraq. Soil Biol. Biochem. 19, 391–396.
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Yahya, A.I., Al-Azawi, S.K. Occurrence of phosphate-solubilizing bacteria in some Iraqi soils. Plant Soil 117, 135–141 (1989). https://doi.org/10.1007/BF02206266
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DOI: https://doi.org/10.1007/BF02206266