Quantitative and qualitative carcass characteristics of feedlot ewes subjected to increasing levels of concentrate in the diet

Cacere, R. A. S; Morais, M.G.; Alves, F. V.; Feijó, G. L. D.; Ítavo, Camila Celeste Brandão Ferreira; Ítavo, L. C. V.; Oliveira, L.B.; Ribeiro, Caroline Bertholini

doi:10.1590/1678-6376

Cited by 14 publications

(11 citation statements)

References 13 publications

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“…Besides the increase of body fat deposition, increasing levels of concentrate resulted in a significant increase in the thickness of the carcass fat cover, as Cacere et al (2014) showed when evaluating the carcass characteristics of animals in this work. According to those authors, adding 80% concentrate to the diet caused excessive thickness of subcutaneous fat on the carcass, compared to ewe lambs fed with 20% concentrate (7.41mm vs. 2.24 mm).…”

Section: Equationssupporting

confidence: 68%

“…During the finishing phase, body weight increased by about 8 kg, as a result of similar TDN intake (Table 3), but energy partition to meet maintenance and gain requirements were different, as the animals supplemented with 80% concentrate deposited a larger proportion of fat (CACERE et al, 2014). Smaller body size animals in this study demanded less metabolizable energy requirements for maintenance, but higher estimated metabolizable energy requirements for weight gain (MORAIS et al, 2016).…”

Section: Equationsmentioning

confidence: 67%

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Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Ribeiro

Morais

Souza

et al. 2016

SCA

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To maximize economic gain in sheep production systems it is critical to adjust feedlot diets to maximize performance while minimizing feed, and especially concentrate, waste. Little information is available on ideal diets for crossbred ewe lambs. Therefore, this study aimed to evaluate the performance of feedlot crossbred ewe lambs, and the digestibility of diets, with increasing levels of concentrate during the growing and finishing phases. Twenty-four crossbred Texel × Pantaneira Texel ewe lambs were confined and fed Tifton hay with increasing levels of concentrate in the diet (20, 40, 60 and 80%) for individual evaluation of dry matter intake (DMI), digestibility of diets, average daily gain (ADG) and feed efficiency (FE). Animals were slaughtered at 47 kg. In the growing phase, the inclusion of concentrate in the diets (1176 g.kg -1 ) did not change DMI (p > 0.05). Concentrate levels had a quadratic effect (p < 0.05) on the dry matter digestibility coefficient (DMDC) and on total digestible nutrients (TDN) during the growing phase. In the finishing phase, there was a negative linear effect of concentrate levels on DMI (p < 0.05), but TDN intake was similar among the experimental diets (p > 0.05). DMDC and TDN values displayed a quadratic behavior (p < 0.05), plateauing at 60% concentrate. ADG and FE increased as concentrate was added to the diet in the growing phase (p < 0.05). During the finishing phase, lamb performance was similar (p > 0.05) for different diets. Thus, the use of 60% concentrate in the confined crossbred ewe lamb diet during growing and 20% concentrate during finishing is recommended. Key words: Feedlot. Digestibility coefficient. Intake. Weight gainh. ResumoPara maximizar o ganho econômico em sistemas de produção de ovinos é fundamental ajustar as dietas de confinamento para aumentar o desempenho e minimizar os custos e desperdícios com alimentação, especialmente com concentrado. Existem poucas informações sobre avaliação de dietas ideais para cordeiras mestiças. Objetivou-se avaliar o desempenho de cordeiras mestiças confinadas e a digestibilidade de dietas com níveis crescentes de concentrado durante as fases de recria e terminação. Foram confinadas 24 fêmeas mestiças Texel (1/2 Pantaneira x 1/2 Texel) alimentadas com feno de capim-Tifton e níveis crescentes de concentrado na dieta (20, 40, 60 e 80%) para avaliação individual do consumo de matéria seca (CMS), digestibilidade dos nutrientes das dietas, ganho médio diário (GMD) e eficiência alimentar (EA). Os animais foram abatidos com 47 kg. Na fase de recria, o CMS não foi alterado (p > 0,05) pela inclusão de concentrado nas dietas (1176 g kg -1 ). Foi observado efeito quadrático dos níveis de concentrado (p < 0,05) sobre os coeficientes de digestibilidade de matéria seca (CDMS) e nutrientes digestíveis totais (NDT) durante a recria. Na fase de terminação, houve efeito linear negativo dos níveis de concentrado sobre o CMS (p < 0,05), porém a ingestão de NDT foi similar entre as dietas experimentais (p > 0,05). O CDMS e o valor...

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Section: Equationssupporting

confidence: 68%

Section: Equationsmentioning

confidence: 67%

Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Ribeiro

Morais

Souza

et al. 2016

SCA

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“…Body components with positive allometric coefficients (b >1) are considered late maturing, because they are still in the rapid growth phase. This result was expected because ewe lambs fed high-concentrate diets have better performance (RIBEIRO, 2011) and higher carcass yields (CACERE et al, 2014). The higher energy content in the highconcentrate diet enable ewe lambs to express their full genetic growth potential and have rapid rates of body protein deposition, resulting in early lean deposition and increased body fat deposition (NRC, 2007).…”

Section: Resultsmentioning

confidence: 99%

“…Bone and muscle have first priority in nutrient utilization during carcass growth, because they are weight-bearing components that occur in greater proportions in relation to the body, especially at birth. Cacere et al (2014) n.a n.a n.a: not analyzed.…”

Section: Resultsmentioning

confidence: 99%

Allometric growth of body components in crossbred ewe lambs fed increasing dietary concentrate levels

Oliveira

Morais

Ribeiro

et al. 2017

SCA

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This study aimed to evaluate the growth of body components in crossbred ewe lambs fed increasing levels of dietary concentrate and to determine the optimum level of supplementation for finishing ewe production. Thirty crossbred (½ Pantaneira × ½ Texel) wool ewe lambs fed Tifton 85 hay (Cynodon spp.) and different dietary concentrate levels (20, 40, 60, and 80% DM basis) were selected for study. At the beginning of the study, six animals were slaughtered for determination of initial body composition. The remaining animals were slaughtered at approximately 48 kg live weight. The growth of body components in relation to body growth was estimated from the allometric model BC = a × (FBW) b , where BC is body component weight, a and b are growth equation parameters, and FBW is fasted body weight. Carcass, muscle, bone, and gastrointestinal tract were late maturing (b <1, P <0.01). Carcass and carcass fat growth was positively affected (linear, P <0.05) by concentrate level. Total fat weight increased with increasing concentrate level (P <0.05). The addition of up to 60% concentrate in growing ewe lamb diets is recommended for production of carcasses with early deposition of muscle and fat. The addition of 20% concentrate in ewe lab diets is sufficient for production of carcasses with maximum deposition of muscle and no excess fat. Key words: Allometric coefficient. Body composition. Lambs. ResumoObjetivou-se avaliar o crescimento dos componentes corporais de borregas mestiças alimentadas com níveis crescentes de concentrado na dieta e estabelecer o nível adequado de suplementação para produção de fêmeas para abate. Foram utilizadas 30 borregas lanadas, oriundas de cruzamentos com ovinos da raça Texel, alimentadas com feno de capim-Tifton 85 (Cynodon spp.) e quatro níveis de concentrado na dieta (20, 40, 60 e 80%). No início do experimento foi realizado abate para determinação da composição corporal de seis borregas. Os demais foram abatidos com aproximadamente 48 kg. Para o estudo do

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“…The ribeye area was measured as the cut surface of the rib eye muscle between the 12th and 13th ribs by tracing the outline onto tracing paper and measuring the area using an LI-3100 Area Meter (LI-3100, Li-COR Biosciences, Lincoln, NE, USA) according to Cacere et al (2014).…”

Section: Methodsmentioning

confidence: 99%

Pineapple stem by-product as a feed source for growth performance, ruminal fermentation, carcass and meat quality of Holstein steers

Hattakum¹,

Kanjanapruthipong²,

Nakthong³

et al. 2019

SA J. An. Sci.

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This experiment was conducted to determine the effects of pineapple stem by-product silage as a feed source in total replacement of Napier or corn silages on growth performance, feed intake and feed efficiency, ruminal fermentation, carcass characteristics and meat quality of Holstein crossbred steers. Forty-eight steers with an average age of 18 months (448.6 ± 51.5 kg) were randomly allocated to three groups (one diet per group) in a completely randomized design. Steers were fed total mixed ration (TMR) containing a roughage-to-concentrate ratio of 20 : 80. The TMR diets contained Napier grass silage (nTMR), whole corn silage (cTMR) or pineapple stem silage (pTMR) and were offered ad libitum for six months. The results revealed that pTMR and cTMR diets resulted in a significantly higher weight gain than nTMR. These results were observed because pTMR and cTMR diets provided more N-free extract (NFE) total digestible nutrients (TDN) than nTMR diet, and the feed conversion efficiencies for pTMR and cTMR diets were higher than those of nTMR. Ruminal pH, ammonia-nitrogen and volatile fatty acid concentrations were not significantly different among dietary treatments. The carcass characteristics of steers fed cTMR and pTMR diets included significantly larger rib eye areas than steers fed nTMR, whereas meat quality was not affected by treatment. Additionally, the current research showed that pTMR diet provided the lowest feed cost per gain. The results suggest that pineapple stem by-product could be regarded as a potential feed source for reducing costs in cattle feedlots.

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Quantitative and qualitative carcass characteristics of feedlot ewes subjected to increasing levels of concentrate in the diet

Cited by 14 publications

References 13 publications

Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Growing and finishing crossbred feedlot ewe lambs fed with increasing levels of concentrate in the diet

Allometric growth of body components in crossbred ewe lambs fed increasing dietary concentrate levels

Pineapple stem by-product as a feed source for growth performance, ruminal fermentation, carcass and meat quality of Holstein steers

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