Partial replacement of corn by cassava starch byproduct on performance and carcass characteristics of feedlot heifers

  • Jair de Araújo Marques IAPAR/EMATER-PR, Brasil
  • Daniele Maggioni Universidade Estadual de Maringá (UEM), Maringá– PR, Brasil.
  • Rogério Ernesto da Silva Faculdade Estadual de Campo Mourão.R. Pernambuco, PR, Brasil
  • Ivanor Nunes do Prado Universidade Estadual de Maringá (UEM). Programa de Pós Graduação em Zootecn
  • Saul Ferreira Caldas Neto Faculdade Estadual de Campo Mourão.R. Pernambuco, PR, Brasil
  • Fernando Zawadzki

Abstract

The objective of this work was to study the effects of partial substitution of corn grain (COR) by dry cassava starch byproduct (CAS) on feed intake, weight gain, feed conversion and carcass physical characteristics in crossbred beef heifers finished in feedlot. Fifty-four heifers, of approximately 15 mo of age and 317 kg mean liveweight, were randomly distributed, in blocks according to breed group, between two treatments, with 27 replicates for performance characteristics and 9 for carcass evaluation. The animals were fed ad libitum twice daily, with corn silage and one of two different concentrates, based on soybean meal and either COR or half COR and half CAS as energy source. No differences (P>0.05) were found between treatments in the variables studied, overall mean values being: daily weight gain (1.1 kg), dry matter (DM) intake (9.1 kg), DM intake/100 kg liveweight (2.6 kg), feed conversion ratio (8.4), warm carcass weight (209.3 kg), carcass weight in arrobas (13.9), carcass yield (51.7%) carcass length (121.1 cm), leg length (71.5 cm), rump roast thickness (25.5 cm), subcutaneous fat thickness (6.6 cm), muscle percentage (30.5), bone percentage (15.5), and muscle plus fat:bone proportions (5.4:1). The dry cassava byproduct can replace 50% of corn in the concentrate without effects on performance and carcass characteristics of crossbred heifers finished in feedlot.

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Author Biography

Jair de Araújo Marques, IAPAR/EMATER-PR, Brasil
Formação Acadêmica Graduação em Medicina Veterinária UFSM, BR em 1985 Especialização Administração Rural UFLA, BR em 1996 Espcialização Produção de Ruminantes UFLA, BR em 1997 Mestrado Zootecnia UEM, BR em 1999 Doutorado Zootecnia UEM, BR em 2004 Atividades Profissionais Pesquisador da Área de Produção Animal IAPAR/EMATER-PR, Brasil Professor Integrado Colégio e Faculdade, PR - Brasil
Published
2006-01-18
How to Cite
Marques, Jair de Araújo, Daniele Maggioni, Rogério Ernesto da Silva, Ivanor Nunes do Prado, Saul Ferreira Caldas Neto, and Fernando Zawadzki. 2006. “Partial Replacement of Corn by Cassava Starch Byproduct on Performance and Carcass Characteristics of Feedlot Heifers”. Archivos Latinoamericanos De Producción Animal 13 (3). https://ojs.alpa.uy/index.php/ojs_files/article/view/3.
Section
Original paper