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BAI Wenjuan, HU Rongrong, ZHANG Jiaen, FENG Lifang, XU Huaqin. A Study on the Isolation, Screening and Phosphate Solubilizing Capacity of Phosphate Solubilizing Bacteria in the Rhizosphere of Corn[J]. Journal of South China Agricultural University, 2013, 34(2): 167-176. DOI: 10.7671/j.issn.1001-411X.2013.02.009
Citation: BAI Wenjuan, HU Rongrong, ZHANG Jiaen, FENG Lifang, XU Huaqin. A Study on the Isolation, Screening and Phosphate Solubilizing Capacity of Phosphate Solubilizing Bacteria in the Rhizosphere of Corn[J]. Journal of South China Agricultural University, 2013, 34(2): 167-176. DOI: 10.7671/j.issn.1001-411X.2013.02.009

A Study on the Isolation, Screening and Phosphate Solubilizing Capacity of Phosphate Solubilizing Bacteria in the Rhizosphere of Corn

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  • Received Date: February 20, 2012
  • Phosphate-solubilizing bacteria were isolated from the rhizosphere of corn, and 38 strains of inorganic phosphate-solubilizing bacteria and 35 strains of organic phosphate-solubilizing bacteria were screened by using traditional method of isolation and culture of microorganisms. The number of both total bacteria and phosphate-solubilizing bacteria in the rhizosphere soil was higher than that in the bulk soil. Major bacterial colony was milky or yellow, irregular or roughly round, smooth, thick, flat, non-transparent with ragged edge. Furhter study on phosphorus solubilizing capacity of the strains by Mo-Sb colorimetry method indicated that pH was significantly correlated with the content of available P of inorganic phosphate-solubilizing bacteria strains, but not correlated with that of organic phosphate-solubilizing bacteria strains. There were great differences between solubilizing calcium phosphate by inorganic phosphate-solubilizing bacteria and solubilizing lecithin by organic phosphate-solubilizing bacteria. Their phosphate-solubilizing capacity ranged from 8.88 to 108.31 and 0.51 to 3.53 mg/L, respectively. The strain SWJ1-4 and SWJ3-1 had a higher ability in solubilizing inorganic phosphate than other strains and strain RYJ1-6 had a higher capacity in solubilizing organic phosphate. The three strains had great potential in further development of microbiological fertilizer because of their stronger phosphate-solubilizing ability, faster growth rate and better growing state.
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