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

Authors
  • SANTOS, F. C. dos
  • REIS, D. P. dos
  • GOMES, E. A.
  • LADEIRA, D. de A.
  • OLIVEIRA, A. C. de
  • MELO, I. G.
  • SOUZA, F. F. de
  • MATTOS, B. B.
  • CAMPOS, C. N.
  • OLIVEIRA-PAIVA, C. A.
Publication Date
Nov 08, 2022
Source
Repository Open Access to Scientific Information from Embrapa
Keywords
Language
English
License
Unknown
External links

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 ?-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.

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