African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5169

Full Length Research Paper

Influence of phosphorus-solubilizing microorganisms and phosphate amendments on pearl millet growth and nutrient use efficiency in different soils types

Flávia Cristina dos Santos
  • Flávia Cristina dos Santos
  • Embrapa Corn and Sorghum Brazilian Agricultural Research Corporation, Sete Lagoas, MG, Brazil.
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Denise Pacheco dos Reis
  • Denise Pacheco dos Reis
  • Federal University of São João del-Rei, Sete Lagoas, MG, Brazil.
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Eliane Aparecida Gomes
  • Eliane Aparecida Gomes
  • Embrapa Corn and Sorghum Brazilian Agricultural Research Corporation, Sete Lagoas, MG, Brazil.
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Daniela de Azevedo Ladeira
  • Daniela de Azevedo Ladeira
  • Federal University of São João del-Rei, Sete Lagoas, MG, Brazil.
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Antônio Carlos de Oliveira
  • Antônio Carlos de Oliveira
  • Embrapa Corn and Sorghum Brazilian Agricultural Research Corporation, Sete Lagoas, MG, Brazil.
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Izabelle Gonçalves Melo
  • Izabelle Gonçalves Melo
  • Federal University of São João del-Rei, Sete Lagoas, MG, Brazil.
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Fabiane Ferreira de Souza
  • Fabiane Ferreira de Souza
  • Embrapa Corn and Sorghum Brazilian Agricultural Research Corporation, Sete Lagoas, MG, Brazil.
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Bianca Braz Mattos
  • Bianca Braz Mattos
  • Embrapa Soil, Rio de Janeiro, RJ, Brazil.
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Cleide Nascimento Campos
  • Cleide Nascimento Campos
  • Embrapa Corn and Sorghum Brazilian Agricultural Research Corporation, Sete Lagoas, MG, Brazil.
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Christiane Abreu de Oliveira-Paiva
  • Christiane Abreu de Oliveira-Paiva
  • Embrapa Corn and Sorghum Brazilian Agricultural Research Corporation, Sete Lagoas, MG, Brazil.
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  •  Received: 17 November 2021
  •  Accepted: 31 January 2022
  •  Published: 31 March 2022

Abstract

Two greenhouse growth trials were performed to assess inoculation with phosphorus (P)-solubilizing microorganisms (PSM) in combination with alternative sources of phosphate in pearl millet (Pennisetum glaucum) cultivation: One using sandy soil and the other using clayey soil. The treatments comprised five P sources, with or without inoculation with PSM B119 (Bacillus megaterium) and B2084 (Bacillus subtilis) strains. Amendment of alternative sources (granulated, branned organomineral, and Bayovar rock) of P along with PSM inoculation produced more plant dry mass on sandy soil, which was not observed on clayey soil. Phosphorus use efficiency (PUE) did not differ between inoculated and non-inoculated treatments, and it was higher with the alternative P sources, compared to triple superphosphate (TSP) treatments. Available P content in the soil was higher with TSP, in sandy soil, and with PSM inoculation. Overall, acid and alkaline phosphatases and β-glucosidase activity was higher in clayey soil, compared to sandy soil, which contains little organic matter; it was also higher with alternative P sources, compared to TSP, and in inoculation treatments, showing the potential of using PSM inoculation and alternative P sources to achieve higher sustainability and productivity in agriculture.

 

Key words:  Pennisetum  glaucum, alternative  phosphorus  sources,  fertilization, organominerals.