African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6842

Full Length Research Paper

Agronomic efficiency of Bradyrhizobium in peanut under different environments in Brazilian Northeast

Ciro Igor Torres Sizenando
  • Ciro Igor Torres Sizenando
  • Pós-graduação em Ciências Agrárias, Universidade Estadual da Paraíba, Rua das Baraúnas, 351 - Bairro Universitário 58429-500, Campina Grande, Paraíba, Brazil.
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Jean Pierre Cordeiro Ramos
  • Jean Pierre Cordeiro Ramos
  • Centro de Ciências Agrárias, Universidade Federal da Paraíba, Campus II, Rodovia PB 079 - Km 12, 58.397-000, Areia, Paraíba, Brazil.
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Paulo Ivan Fernandes-Junior
  • Paulo Ivan Fernandes-Junior
  • Embrapa Semiárido, Rodovia BR 428 KM 152, 56302-970, Petrolina, Pernambuco, Brazil.
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Liziane Maria de Lima
  • Liziane Maria de Lima
  • Embrapa Algodão, Rua Oswaldo Cruz, n° 1.143, Bairro Centenário, 58428-095, Campina Grande, Paraíba, Brazil.
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Rosa Maria Mendes Freire
  • Rosa Maria Mendes Freire
  • Embrapa Algodão, Rua Oswaldo Cruz, n° 1.143, Bairro Centenário, 58428-095, Campina Grande, Paraíba, Brazil.
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Roseane Cavalcanti dos Santos
  • Roseane Cavalcanti dos Santos
  • Embrapa Algodão, Rua Oswaldo Cruz, n° 1.143, Bairro Centenário, 58428-095, Campina Grande, Paraíba, Brazil.
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  •  Received: 03 June 2016
  •  Accepted: 01 August 2016
  •  Published: 15 September 2016

Abstract

Several legumes have natural ability to associate with nitrogen-fixing bacteria known as rhizobia. The efficiency of this association depends on the plant and bacterial genotype and the edaphoclimatic conditions. Peanut is a tropical legume able to associate with a wide range of rhizobia and the selection of efficient bacteria is important to increase the nitrogen fixation in this crop. In order to investigate the agronomic efficiency of two Bradyrhizobium strains, two peanut genotypes were used in field trails carried out in three environments located at Brazilian Northeast. The genotypes (BR1 and L7 Bege) were submitted to rhizobial inoculation (SEMIA 6144 or ESA 123, both Bradyrhizobium strains), and chemical nitrogen fertilization in randomized block design experiments. The following traits were analyzed: flowering (F), main axis height (MAH), number of nodules/plant (NN), number of pods/plant (NP) and weight of pods (WP). Differential responses were found in all to treatments to NN, NP and WP, in the three environments studied. Overall, ESA 123 showed good agronomic performance inducing higher pod production. The results support the evaluation of the Bradyrhizobium in further experiments aiming at its recommendation to commercial inoculants in Brazilian Northeast region.

 

Key words: Biological nitrogen fixation, inoculant, fertilization, symbiosis, rhizobia.