African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Forage yield and nutritive value of naturally growing Brachiaria decumbens as undergrowth to an aroeira tree stand in a silvopasture system

Carla Renata Silva Baleroni Guerra
  • Carla Renata Silva Baleroni Guerra
  • Fundação Educacional de Andradina (FEA), R. Amazonas, 571, Andradina, SP, Brazil.
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Mario Luiz Teixeira de Moraes
  • Mario Luiz Teixeira de Moraes
  • UNESP – Campus Ilha Solteira, SP, Brazil.
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Camila Regina Silva Baleroni Recco
  • Camila Regina Silva Baleroni Recco
  • Fundação Educacional de Andradina (FEA), R. Amazonas, 571, Andradina, SP, Brazil.
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Cristina Lacerda Soares Petrarolha Silva1
  • Cristina Lacerda Soares Petrarolha Silva1
  • Fundação Educacional de Andradina (FEA), R. Amazonas, 571, Andradina, SP, Brazil.
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Flavia Maria de Andrade Gimenes
  • Flavia Maria de Andrade Gimenes
  • Instituto de Zootecnia (IZ) R. Heitor Penteado, 56, Nova Odessa, SP, Brazil.
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  •  Received: 05 August 2016
  •  Accepted: 15 September 2016
  •  Published: 06 October 2016

Abstract

This study evaluated the forage yield and feed chemical composition of a Brachiaria decumbens natural pasture as undergrowth to a Myracrodruon urundeuva (aroeira) tree stand in a silvopasture system at  UNESP/Ilha Solteira, Selvíria, Mato Grosso do Sul, Brazil. Sampling was conducted in a completely randomized block design with a factorial scheme of two plots and two sub-plots, with plots as the light regimen (full sunlight or shade from aroeira trees, spaced 3 × 3 m) and sub-plots as the grazing rotation scheme (pre-grazing and post-grazing). Sampling was performed along the four seasons of a year in four replicates. Canopy height, forage mass, morphological composition, nutritive value, and forage digestibility (whole-plant sample) were evaluated. Forage mass was significantly higher in the full sun area (1,306 kg DM/ha) than in the shaded site (727 kg DM/ha). Forage yield was low during the experimental period (1,529 and 58 kg/ha in the full sun and shaded sites, respectively). The nutritive value of B. decumbens was not significantly different between light regimens. Growing B. decumbens as undergrowth in aroeira stands may be an option in areas where the trees still occur, but other planting densities should be examined.

Key words: Forage yield, Myracrodruon urundeuva, rising plate meter, shading, sward height.