Development, economic viability and attributes of lamb carcass from confined animals fed on different amounts of crude glycerin

Abstract

The current study aims to assess the effect from crude glycerin inclusion (0, 7, 14, and 21% dry matter) in the diet of slaughtered lamb on their development, nutrient consumption, biometrical measures, diet economic viability and carcass features. Thirty two (32) non-castrated male Texel lambs were used in the study, they presented mean initial weight 15.9 ± 4.1 kilos and were distributed in casual outlining. They were fed with four treatments, with 8 repetitions. Animals were slaughtered when they reached approximately 35 kilos. The mean total weight gain was 20.72 kilos and mean daily weight gain was 260 grams. No changes resulted from glycerin use. The carcass performance was similar among treatments (P>0.05) and the cold carcass performance (CCP) was 44.68%. There were no effects (P>0.05) on the loin eye area (LEA) and on fat thickness (FT); they showed averages of 13.66 cm 2 and 0.84 mm, respectively. Nutrition cost per animal during the whole confinement period varied between R$82.60 (eighty-two Reais and forty-eight cents) to R$92.48. The smallest nutrition amount consisted of 21% crude glycerin. The gross profit ranged from R$30.75 to R$ 34.01 per animal, for feed without glycerin and 21% glycerin, respectively. Animal development was not impacted by glycerin introduction, even with decrease on dry and organic mass consumption. The result showed that crude glycerin inclusion might be used in lambs' diet. Whenever there are big amounts of feed involved in the process, the 21% crude glycerin addition may be an interesting cost reduction. Seventy eight percent (78%) glycerol crude glycerin to replace corn-based feed in confined lambs' diet appeared to be nutritionally and economically viable. ResumoO objetivo desta pesquisa foi avaliar o efeito dos teores de inclusão de glicerina bruta (0, 7, 14, e 21% da matéria seca) na dieta de cordeiros em terminação, sobre o desempenho, o consumo de nutrientes, as medidas biométricas, a viabilidade econômica da dieta e características da carcaça. Utilizou-se 32 cordeiros machos não castrados da raça Texel, com peso médio inicial de 15,9 ± 4,1 kg, distribuídos em delineamento inteiramente casualizado, com quatro tratamentos e oito repetições. Ao atingir o peso médio de 35 kg, os animais foram abatidos. O ganho de peso total foi em média 20,72 kg e o ganho de peso médio diário foi de 260 g e não sofreram alterações com o uso da glicerina. As características de rendimento de carcaça avaliadas se assemelharam entre os tratamentos (P>0,05) e o rendimento de carcaça fria (RCF) foi em média 44,68%. Não houve efeito (P>0,05) para área de olho de lombo (AOL) e espessura de gordura (EG), apresentando médias de 13,66 cm 2 e 0,84 mm, respectivamente. Os custos com alimentação por animal no período total de confinamento variaram entre R$82,60 a R$92,48, sendo o menor valor para o tratamentos contendo 21% de glicerina bruta. A margem bruta de lucro variou de R$30,75 a R$ 34,01 por animal, para ração sem glicerina e com 21% de glicerina, respectivamente. O desempenho anim...

Desempenho, Características Da Carcaça E Da Carne De Cordeiros Confinados Com Níveis Crescentes De Bagaço De Laranja Em Substituição Ao Milho

“…As medidas subjetivas de conformação e acabamento (Tabela 3) não diferiram significativamente (P>0,05) entre os tratamentos e apresentaram valores médios de 2,74 e 2,10, respectivamente. Ao substituir o milho moído por glicerina bruta em níveis crescentes na dieta de cordeiros Texel, observou-se também escore de acabamento em gordura de 2,3 (2) . Os valores observados para conformação (média de 2,74) indicam que os animais estavam no padrão próximo a 3 (carcaças retilíneas com boa cobertura muscular) e, para a avaliação de acabamento, os animais se encontravam no padrão 2 (carcaça com gordura escassa).…”

“…Sendo assim, a adoção de algumas estratégias de produção intensiva faz-se necessária na ovinocultura, principalmente em regiões em que o custo da terra é considerado elevado. Nesse sentido, pesquisas têm mostrado como alternativa eficiente para a terminação de cordeiros o uso do confinamento, ferramenta que permite encurtar o ciclo de produção e disponibilizar no mercado carcaças de animais jovens e de melhor qualidade (1)(2) . No entanto, deve-se observar o custo da alimentação, pois o concentrado da dieta é a fração mais onerosa no sistema de produção (3) , correspondendo de 60% a 70% desses custos.…”

Carcass characteristics of lambs fed diets with increasing levels of crude glycerin

“…The observed behaviour for the EBW, HCW, and CCW variables may be related to DM intake and ME intake due the fact that glycerol from CG may have increased dietary energy efficiency by the microorganisms in the rumen and consequently favoured the synthesis of tissues in the body of the animal. The BWS values are between the intervals of studies on sheep of the same age that were fed CG in confinement and were slaughtered when they were between 25 and 38 kg [7,8,19,20]. In the present study the animals were slaughtered at an average of 35.21 kg and presented a linear behaviour that increased with the inclusion of CG in the diets, with a better performance of the animals as the amount of corn replaced by CG increased.…”

“…The longissimus muscle area that we obtained can be considered satisfactory. Lage et al [19] evaluated the effects of inclusion of CG with 36.2% of glycerol in the diet of confined sheep slaughtered at a mean of 32.72 kg and found an average of 12.1 cm 2 , while Rego et al [8] and Carvalho et al [20] obtained much higher values of 13.66 and 14.44 cm 2 . According to Cezar and Souza [17] the determination of the longissimus muscle area measured as the longissimus dorsi muscle has traditionally been used as a good estimate of carcass musculature and is directly correlated with the muscle/bone relationship in the most important cuts of the carcass, which exerts an important influence on the classification of the carcass and the evaluation of the final price of the meat.…”

Carcass and meat quality of lambs fed with sunflower seed or oil

“…The subjective measures of finishing and conformation (Table 2) did not differ significantly (P > 0.05) between treatments and presented mean values of 3.66 and 3.83, respectively. When replacing ground corn with crude glycerin at increasing levels in the diet of Texel lambs, a degree of finishing of 2.3 (2) was also observed (Rego et al, 2015). The values observed for finishing (mean of 3.66) indicate that the animals were in pattern 3…”