African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6691

Full Length Research Paper

Nitrate reductase activity and corn hybrid yields intercropped with Brachiaria brizantha in three sowing arrangements

Orismário Lúcio Rodrigues
  • Orismário Lúcio Rodrigues
  • Departamento de Agronomia, Faculdade Univértix , Matipó, Brasil.
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João Carlos Cardoso Galvão
  • João Carlos Cardoso Galvão
  • Departamento de Fitotecnia, Universidade Federal de Viçosa, Viçosa, Brasil.
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Evander Alves Ferreira
  • Evander Alves Ferreira
  • Departamento de Fitotecnia, Universidade Federal de Viçosa, Viçosa, Brasil.
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Daniel Valadão Silva
  • Daniel Valadão Silva
  • Departamento de Fitotecnia, Universidade Federal de Viçosa, Viçosa, Brasil.
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Márcia Vitória dos Santos
  • Márcia Vitória dos Santos
  • Departamento de Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brasil.
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Lino Roberto Ferreira
  • Lino Roberto Ferreira
  • Departamento de Agronomia, Faculdade Univértix , Matipó, Brasil.
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Rosana Cristina Pereira
  • Rosana Cristina Pereira
  • Departamento de Fitotecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brasil.
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Rafael da Silva Felipe
  • Rafael da Silva Felipe
  • Departamento de Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brasil.
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  •  Received: 15 October 2013
  •  Accepted: 10 October 2014
  •  Published: 20 November 2014

Abstract

Crop-livestock systems consists in the cultivation of agricultural and foraging species in the same area, in consortium, rotation or crops succession. Among several used crops, corn and brachiaria intercropping stands out, for its importance, cultivation tradition and adaptation of species to intercropping cultivation. This study aimed to evaluate the influence of Brachiaria brizantha (brachiaria) sowing arrangements on yield and nitrate reductase activity in different corn hybrids. A randomized block design was used with four replications, in a 4×3 factorial scheme. Treatments constituted of four corn hybrids DKB 747, BM2202, AGN30A00 and AG2060 and three forage sowing arrangements: a) corn crop at 0.9 m spacing, two rows of B. brizantha in the inter-row at 0.3 m from the corn row; b), corn crop at 0.9 m spacing, one brachiaria row in the corn sowing row, mixed with starter fertilizer, and another one in the inter-row center; c) corn crop at 0.45 m spacing, with brachiaria in the corn sowing row, mixed with starter fertilizer. The spacing reduction between corn rows promoted yield increase and reduced brachiaria growth. Lower nitrate reductase activity in corn plants was found in the corn crop at 0.9 m spacing, with two B. brizantha rows located in the corn interrow at 0.3 m.

 

Key words: Brachiaria, competition crop-livestock systems, Zea mays