Comparação de Sistemas de Avaliação de Dietas para Bovinos no Modelo de Produção Intensiva de Carne: Confinamento de Tourinhos Jovens

Sampaio, Alexandre Amstalden Moraes; Brito, Rodolfo Marques de; Carvalho, Ricardo de Moraes

doi:10.1590/s1516-35982002000100018

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…To achieve success in these systems, nutrient management is essential to determine existing interactions with physiological responses that alter body composition and feed conversion, with the purpose to seize the productive potential at an appropriate production cost (Carvalho & Siqueira, 2001;Gerassev et al, 2006), and considering the quality of used ingredients (Vasconcelos, 1993;Sampaio et al, 2002). The feedlot system can reduce the production cycle and generate carcasses of young animals with better quality (Urano et al, 2006) to the market, meeting the requirements of the market for sheep meat (Perez, 2003).…”

Section: Introductionmentioning

confidence: 99%

Performance and carcass characteristics of lambs fed diets with fat and vitamin E

Pinto

Garcia²,

Júnior³

et al. 2011

R. Bras. Zootec.

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-This experiment aimed to determine the influence of diets with inclusion of protected fat and vitamin E on performance, yield and carcass characteristics of feedlot lambs with different weights. Thirty-two non-castrated Santa Ines lambs were fed diets with a ratio of 40% forage and 60% concentrate ad libitum, with presence or absence of protected fat and/or vitamin E, in a total of four diets. Two weights of early containment were also considered: between 20 and 25 kg and between 30 and 35 kg. All animals were slaughtered at 84 days of confinement. Animals fed diets without addition of protected fat, regardless of the use of vitamin E, had the highest intakes of dry matter, crude protein, neutral detergent fiber and ash, and decreased intake of ether extract. The variables investigated did not affect daily weight gain and total gain. Feed conversion was better for the lighter confined animals not fed protected fat. The heavier feedlot lambs fed diets with vitamin E showed higher cold carcass. The warm carcass for the lighter animals confined fed with vitamin E, and the heavier ones, fed with protected fat and vitamin E, showed the best yields of cold carcass. Objective measures of the carcass cold had the highest mean for heavier feedlot lambs. The addition of fat in the diet reduces the intake of dry matter and increases the ether extract.Although the inclusion of vitamin has no effect on intake of nutrients, it protects the carcasses from losses during cooling, and weight differences at containment directly reflect the measures of the carcasses.

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Section: Introductionmentioning

confidence: 99%

Performance and carcass characteristics of lambs fed diets with fat and vitamin E

Pinto

Garcia²,

Júnior³

et al. 2011

R. Bras. Zootec.

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“…Na avaliação econômica do confinamento, foram considerados os custos das dietas testadas, segundo metodologia descrita por Sampaio et al (2002) (1,0 kg/dia); SMAP1 = silagem de capim-marandu com 10% PCP (1,0 kg/dia); SMA2 = silagem de capim-marandu (1,2 kg/dia); SMAP2 = silagem de capimmarandu com 10% PCP (1,2 kg/dia); SMI1 = silagem de milho (1,0 kg/dia); SM2 = silagem de milho (1,2 kg/dia).…”

Section: Methodsunclassified

Viabilidade econômica, desempenho e características de carcaça de garrotes em confinamento alimentados com dietas contendo silagem de capins tanzânia ou marandu ou silagem de milho

et al. 2008

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RESUMO -O experimento foi conduzido com o objetivo de avaliar o desempenho, as características de carcaça e a viabilidade econômica do confinamento de bovinos alimentados com silagem dos capins tanzânia ou marandu, com 0 e 10% de polpa cítrica peletizada (PCP), em comparação à silagem de milho. Foram utilizados silos de superfície (12 × 5 × 1 m) como silos experimentais. O delineamento experimental utilizado foi o inteiramente casualizado, com oito tratamentos (dietas) e seis repetições (animais). As dietas experimentais foram formuladas com os capins tanzânia ou marandu, acrescidos ou não de 10% de PCP, em comparação à silagem de milho e de forma a permitir ganhos de 1,0 e 1,2 kg/dia, respectivamente.Os animais alimentados com as dietas com silagem de capim-marandu e 10% de PCP formuladas para ganhos de peso de 1,0 e 1,2 kg/dia, apresentaram os maiores consumos de MS. Não houve diferença significativa no ganho de peso vivo, no peso de carcaça quente, no rendimento de carcaça, no ganho de carcaça, na espessura de gordura e na área de olho-de-lombo. A taxa de remuneração do capital e a taxa interna de retorno foram maiores nos animais alimentados com as dietas contendo silagem de milho.Palavras-chave: aditivo, análise econômica, silagem de capim Economical viability, performance, and carcass characteristics of confined steers fed palisadegrass silage, tanzaniagrass silage or corn silage ABSTRACT -The experiment was carried out to evaluate the performance, carcass characteristics, and the economical viability of a steer feedlot fed Tanzania and Marandu grass silage, with 0% and 10% of pelleted citrus pulp (PCP), compared with corn silage. Experimental surface silos (12 × 5 × 1 m) were used. The data were analyzed according to a completely randomized experimental design with eight treatments (diets) and six replications (animals). The experimental diets were formulated using Tanzania or Marandu grass silages, with or without addition 10% of PCP, in comparison with corn silage diets, in order to allow body weight gain of 1.0 and 1.2 kg/day, respectively. Animals that received the diets with Marandu grass silage with 10% of PCP and formulated for gain of 1.0 and 1.2 kg/day, presented the highest DM intake. There was no significant difference in the variables live weight, hot carcass weight, dressing percentage, carcass gain, fat thickness, and ribeye area. Capital remuneration rate and the internal rate of return were highest on the animals fed corn silage diets.

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“…Como a alimentação representa até 75% dos custos de produção no confinamento, é fundamental que sejam utilizados animais de boa qualidade, com características desejáveis de carcaça e da carne, sem excesso de gordura; e ingredientes de alta qualidade na dieta, que forneçam os nutrientes necessários para um ganho de peso elevado com baixos custos (SAMPAIO; BRITO; CARVALHO, 2002;VASCONCELOS, 1993).…”

Section: Domingos Marcelo Cenachi Pesceunclassified

Efeito da dieta contendo caroço de algodão no desempenho, características quantitativas da carcaça e qualitativas da carne de novilhos Nelore confinados

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Efeito da dieta contendo caroço de algodão no desempenho, características quantitativas da carcaça e qualitativas da carne de novilhos Nelore confinados. The purpose of this work was to evaluate performance, quantitative characteristics of the carcass and qualitative characteristics of the meat of confined castrated Nelore males. Animals were confined with four diets containing 80% concentrate (dry matter): a control diet devoid of whole cottonseed (CA0), a diet containing 10%(CA10) or 20% of whole cottonseed (CA20) and a diet containing 20% of whole cottonseed heated in a climate chamber (CA20H). At the end of the experimental period, there were no differences between treatments for dry matter intake. However, the average daily gain, live weight and feed efficiency were greater for animals fed the whole cottonseed-enriched diets, whit no difference among diets when compared to control. Values documented for blood urea-N were significantly higher for treatments containing whole cottonseed, while glucose and total serum protein did not differ. Carcass yield, loin eye area, subcutaneous fat thickness, renal and pelvic fat, warm carcass weight and cold carcass weight, weight of the liver and values of carcass pH were not significantly different. Differences were noted only for carcass temperature 1 hour and 24 hours after slaughter, lower for CA0 treatment. There were no significant differences for dry matter content and ethereal meat extract. No differences were found between total cooking losses and meat tenderness between 7 and 14 days of maturing, as verified by shearing forces. Only time effect was noted, with meat matured for 14 days presenting with increased tenderness and less total cooking losses. Sensorial analysis of the Longissimus dorsi did not show differences among treatments for typical odor, juicyness and typical or off-flavour. No statistical difference was found for total saturated fatty acids and omega-3, or the relations between total unsaturated or monounsaturated and saturated fatty acids. However, animals fed whole cottonseed-enriched diets had higher concentrations of polyunsaturated fatty acids and omega-6 and lower concentrations of monounsaturated fatty acids in the Longissimus dorsi. Whole cottonseed can be

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Comparação de Sistemas de Avaliação de Dietas para Bovinos no Modelo de Produção Intensiva de Carne: Confinamento de Tourinhos Jovens

Cited by 6 publications

References 2 publications

Performance and carcass characteristics of lambs fed diets with fat and vitamin E

Performance and carcass characteristics of lambs fed diets with fat and vitamin E

Viabilidade econômica, desempenho e características de carcaça de garrotes em confinamento alimentados com dietas contendo silagem de capins tanzânia ou marandu ou silagem de milho

Efeito da dieta contendo caroço de algodão no desempenho, características quantitativas da carcaça e qualitativas da carne de novilhos Nelore confinados

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