No âmbito do projeto LegForBov foi publicado um artigo na revista Meat Science que aborda os resultados de um ensaio realizado no INIAV-Fonte Boa em que se pretendeu estudar o impacto da substituição parcial dos cereais por subprodutos agroindustriais na dieta de bovinos em fase de acabamento
Meat Science
Meat Science 188 (2022) 108782
Available online 1 March 2022
0309-1740/© 2022 Published by Elsevier Ltd.
Effects of partial substitution of grain by agroindustrial byproducts and sunflower seed supplementation in beef haylage-based finisher diets on growth, in vitro methane production and carcass and meat quality
José Santos-Silva a,b,*, Alexandra Francisco a,b, Ana Paula Portugal a, Kátia Paulos a,
Maria Teresa Dentinho a,b, João M. Almeida a,b, Leandro Regedor a, Letícia Fialho d,
Liliana Cachucho d, Eliana Jerónimo d,e, Susana P. Alves b,c, Rui J.B. Bessa b,c
a Instituto Nacional de Investigação Agrária e Veterinária I.P. (INIAV), Fonte-Boa, 2005-048 Vale de Santarém, Portugal
b Centro de Investigação Interdisciplinar em Sanidade Animal, Avenida da Universidade Tecnica, Lisboa, Portugal
c Faculdade de Medicina Veterinária, Universidade de Lisboa, Pólo Universitário do Alto da Ajuda, Lisboa, Portugal
d Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo (CEBAL), Instituto Politécnico de Beja (IPBeja), 7801-908 Beja, Portugal
e MED – Mediterranean Institute for Agriculture, Environment and Development, CEBAL, 7801-908 Beja, Portugal
Keywords: Beef; High-forage diets; Growth; Methane; Meat quality; Fatty acids
A B S T R A C T
Thirty-two bulls were assigned to four total mixed biodiverse haylage-based diets to evaluate the effects of partial substitution of grains by agroindustrial byproducts, sunflower seeds (SS) supplementation and haylage level on growth, in vitro methane production and carcass and meat quality. Dietary treatments included a grain-based diet with 30% grain and haylage:concentrate ratio (H:C) of 60:40 (DM basis) (MCe); a by-product-based diet where 50% of the grain was substituted for by-products (H:C, 60:40) (MBp); a byproducts diet with 10% sunflower seed and 90% (DM) MBp (H:C, 54:46) (MBpSS); and a byproducts, SS diet with increased haylage (H:C, 67.5:32.5) (HBpSS). Dry matter intake and growth rate were lower in HBpSS, but feed conversion ratio was unaffected by diet. In vitro methane emissions were reduced by SS. Meat colour and shear force were similar among diets. Lipid oxidation in cooked meat was reduced and fatty acid composition was improved with SS. Biodiverse haylagebased diets may be a viable option for finishing bulls.