African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6473

Full Length Research Paper

A meta-analysis of in situ degradability of corn grains and non-starch energy sources found in Brazil

Marcos Busanello
  • Marcos Busanello
  • Post Graduate Program in Animal Science and Pastures of the University of São Paulo – College of Agriculture “Luiz de Queiroz” (ESALQ), Piracicaba – SP, Brazil.
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João Pedro Velho
  • João Pedro Velho
  • Department of Animal Science and Biological Sciences, Federal University of Santa Maria (UFSM) – Campus Palmeira das Missões, 98300-000, Palmeira das Missões, RS, Brazil.
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Antônio Augusto Cortiana Tambara
  • Antônio Augusto Cortiana Tambara
  • Federal Institute Farroupilha, Campus São Vicente do Sul, São Vicente do Sul, RS, Brazil.
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Dileta Regina Moro Alessio
  • Dileta Regina Moro Alessio
  • Post Graduate Program in Animal Science, University of the State of Santa Catarina (UDESC), Lages SC, Brazil.
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Ione Maria Pereira Haygert-Velho
  • Ione Maria Pereira Haygert-Velho
  • Department of Animal Science and Biological Sciences, Federal University of Santa Maria (UFSM) – Campus Palmeira das Missões, 98300-000, Palmeira das Missões, RS, Brazil.
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André Thaler Neto
  • André Thaler Neto
  • Department of Animal and Food Production, University of the State of Santa Catarina (UDESC), Lages - SC. Brazil.
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  •  Received: 11 March 2016
  •  Accepted: 23 April 2016
  •  Published: 26 May 2016

Abstract

Owing to the magnitude and importance of the production of citrus fruits pulp, soybeans and corn in Brazil, considerable research has focused on the main feedstuffs, co-products, and/or byproducts of these crops. The present study is aimed at comparing the ruminal degradability parameters of corn and non-starchy energy sources with high pectin content, including soybean hulls and citrus pulp, through meta-analysis. The experiments were designed to include parameters related to potential and effective degradability of the concentrates of these energy feeds. The database (DB) was composed of 62 treatments obtained from 20 papers. No difference (P>0.05) was observed in any of the ruminal degradability parameters of the dry matter (DM) or crude protein (CP), demonstrating that the total replacement of corn grain by non-starch feed is possible. The degradation rates of DM were 6.78 and 6.14%.h-1 and those of CP were 5.97 and 5.93%.h-1, for corn and non-starch feeds, respectively. Therefore, depending on the cost, corn grain could be substituted by soybean hulls or citrus pulps, which reduce the possibility of the occurrence of metabolic disorders, such as subclinical and/or clinical acidosis, without affecting ruminal fermentation.

 

Key words: Starch, citrus pulps, soybean hulls, energy, pectin, degradability, non-starch feed, acidosis.