African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6848

Full Length Research Paper

Use of Bacillus spp. as growth promoter in carrot crop

Junia Maria Clemente*
  • Junia Maria Clemente*
  • Pós-Doutora - Faculdade do Noroeste de Minas, FINOM, Brazil.
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Carine Rezende Cardoso
  • Carine Rezende Cardoso
  • Laboratório de Biocontrole Farroupilha, Brazil.
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Bruno Sérgio Vieira
  • Bruno Sérgio Vieira
  • Universidade Federal de Uberlândia - Campus de Monte Carmelo, Instituto de Ciências Agrárias, Brazil.
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Iara da Mata Flor
  • Iara da Mata Flor
  • Laboratório de Biocontrole Farroupilha, Brazil.
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Robson Luz Costa
  • Robson Luz Costa
  • Laboratório de Biocontrole Farroupilha, Brazil.
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  •  Received: 12 June 2016
  •  Accepted: 12 August 2016
  •  Published: 01 September 2016


Growth promoting rhizobacteria may increase the yield of some crops. Several microbial products that stimulate plant growth have been marketed. Therefore, the objective of this study was to evaluate the effect of bacteria from Bacillus genera on the production of commercial carrot roots (Daucus carota L.) in field conditions. The following isolates: SF 264 (Bacillus spp.), SF 268 (Bacillus spp.) and commercial formulations based on SF 202 (Rizos®, B. subtilis), SF 266 (Quartz®, B. methylotrophicus) and SF 267 (Onix®, B. methylotrophicus) were evaluated in four experiments conducted in commercial fields of carrot production in the municipality of Rio Paranaíba, Minas Gerais - Brazil. Each plot was 6 m long and 1.75 m wide (10.5 m2) including four double rows. An additional treatment containing only water was the control treatment. The experiment was designed as randomized blocks with five replications. The products Rizos®, Quartz® and Onix® containing Bacillus spp. increased the production of commercial carrots roots of all cultivars and sites. The SF 268 and SF 264 isolates were efficient only in two and three experiments, respectively.

Key words: Daucus carota, rhizobacteria, plant growth, Bacillus.