RESUMO
BACKGROUND: This study evaluated the acceptability (by sensorial and visual analyses) of meat from 40 Nellore heifers (finished in feedlots for 73 days) fed with different diets supplemented with essential oils (EOs) and an active principle blend. The five diets tested were: CON - a diet without essential oil and active principle blend (eugenol, thymol, and vanillin); ROS - a diet supplemented with rosemary EO; BLE - supplemented with a blend; BCL - a diet with clove EO+ blend; and BRC - a diet with rosemary, clove EOs + blend. The acceptability of diet and aging time was evaluated by consumers. RESULTS: Diet affected consumer acceptability and visual analysis (meat color). The diets with EO and the blend showed better sensory acceptance by the consumers; meat aged for 7 days received higher scores than meat aged for 1 day. Meat from heifers that received both EOs + blend (BCL, BRC) obtained the highest scores in the visual evaluation. CONCLUSION: The use of natural compounds in ruminant diets improves the sensory characteristics of meat without damaging visual acceptability and may be an alternative to the conventional additive market. © 2020 Society of Chemical Industry.
Assuntos
Ração Animal/análise , Bovinos/metabolismo , Carne/análise , Paladar , Animais , Dieta/veterinária , Eugenol/metabolismo , Feminino , Aditivos Alimentares/metabolismo , Humanos , Óleos Voláteis/metabolismo , Syzygium/metabolismo , Timol/metabolismoRESUMO
Twenty-four female lambs of the Pantaneiro genetic group, with approximately 100 days of age, average body of 16.24 ± 1.78 kg, were slaughtered with 2.0, 3.0 and 4.0 mmof subcutaneous fat thickness, measured by ultrasound in the Longissimus, to evaluate the allometric growth. Lambs fed a complete pelleted diet calculated to ensure a daily weight gain of0.30 kg. Slaughtering was performed as the female lambs reached the pre-established fat thickness. After 24 hours in a cold chamber at 4ºC, chilled carcasses were cut in half and weighed. The right side was separated into five sections to determine the allometry of carcasses and cuts. Neck and rib showed isogonic growth in all treatments. Loin has remained late growth to 2.0 and3.0 mm. Shoulder and leg were isogonic growth in the treatments 3.0 and4.0 mm. The leg in relation to half carcass showed the greatest correlation. The cuts exhibited differentiated development in the growth rates of tissues. It is recommended to slaughter female lambs when they reach3.0 mm of subcutaneous fat thickness, since the carcass has already reached physiological maturity. Shoulder and leg cuts are best suited for dissection for presenting the highest correlation with the carcass in females of the Pantaneiro group.(AU)
Foram utilizadas 24 cordeiras do grupo genético Pantaneiro, com aproximadamente 100 dias de idade e peso corporal médio de 16,24 ± 1,78 kg, abatidas com 2,0; 3,0 e 4,0 mm de espessura de gordura subcutânea, avaliadas por ultrassonografia sobre o Longissimus, para avaliar o crescimento alométrico. As cordeiras receberam ração completa peletizada para ganho de peso diário de 0,30 kg. Os abates ocorreram à medida que as cordeiras atingiam a espessura de gordura pré-determinada. Após 24 horas refrigeradas a 4ºC, as carcaças frias foram seccionadas ao meio e pesadas. O lado direito foi separado em cinco cortes para determinação da alometria da carcaça e dos cortes. Nos cortes pescoço e costilhar, os tratamentos apresentaram crescimento isogônico. O lombo manteve-se tardio para 2,0 e 3,0 mm. A paleta e perna apresentaram crescimento isogônico nos tratamentos 3,0 e 4,0 mm. A perna em relação à meia carcaça apresentou a maior correlação. Os cortes obtiveram desenvolvimento diferenciado nas taxas de crescimento dos tecidos. Recomenda-se o abate de cordeiras Pantaneiras com 3,0 mm de espessura de gordura pela carcaça já ter atingido a sua maturidade fisiológica. Os cortes paleta e perna são os mais indicados para dissecação por apresentarem a maior correlação com a carcaça, em fêmeas do grupo Pantaneiro.(AU)
Assuntos
Animais , Feminino , Carne/análise , Carne , Gordura Subcutânea/anatomia & histologia , Gordura Subcutânea/crescimento & desenvolvimento , Ovinos/anatomia & histologia , Ovinos/crescimento & desenvolvimento , Ovinos/genéticaRESUMO
Twenty-four female lambs of the Pantaneiro genetic group, with approximately 100 days of age, average body of 16.24 ± 1.78 kg, were slaughtered with 2.0, 3.0 and 4.0 mmof subcutaneous fat thickness, measured by ultrasound in the Longissimus, to evaluate the allometric growth. Lambs fed a complete pelleted diet calculated to ensure a daily weight gain of0.30 kg. Slaughtering was performed as the female lambs reached the pre-established fat thickness. After 24 hours in a cold chamber at 4ºC, chilled carcasses were cut in half and weighed. The right side was separated into five sections to determine the allometry of carcasses and cuts. Neck and rib showed isogonic growth in all treatments. Loin has remained late growth to 2.0 and3.0 mm. Shoulder and leg were isogonic growth in the treatments 3.0 and4.0 mm. The leg in relation to half carcass showed the greatest correlation. The cuts exhibited differentiated development in the growth rates of tissues. It is recommended to slaughter female lambs when they reach3.0 mm of subcutaneous fat thickness, since the carcass has already reached physiological maturity. Shoulder and leg cuts are best suited for dissection for presenting the highest correlation with the carcass in females of the Pantaneiro group.
Foram utilizadas 24 cordeiras do grupo genético Pantaneiro, com aproximadamente 100 dias de idade e peso corporal médio de 16,24 ± 1,78 kg, abatidas com 2,0; 3,0 e 4,0 mm de espessura de gordura subcutânea, avaliadas por ultrassonografia sobre o Longissimus, para avaliar o crescimento alométrico. As cordeiras receberam ração completa peletizada para ganho de peso diário de 0,30 kg. Os abates ocorreram à medida que as cordeiras atingiam a espessura de gordura pré-determinada. Após 24 horas refrigeradas a 4ºC, as carcaças frias foram seccionadas ao meio e pesadas. O lado direito foi separado em cinco cortes para determinação da alometria da carcaça e dos cortes. Nos cortes pescoço e costilhar, os tratamentos apresentaram crescimento isogônico. O lombo manteve-se tardio para 2,0 e 3,0 mm. A paleta e perna apresentaram crescimento isogônico nos tratamentos 3,0 e 4,0 mm. A perna em relação à meia carcaça apresentou a maior correlação. Os cortes obtiveram desenvolvimento diferenciado nas taxas de crescimento dos tecidos. Recomenda-se o abate de cordeiras Pantaneiras com 3,0 mm de espessura de gordura pela carcaça já ter atingido a sua maturidade fisiológica. Os cortes paleta e perna são os mais indicados para dissecação por apresentarem a maior correlação com a carcaça, em fêmeas do grupo Pantaneiro.