Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights

Pazdiora, Raul Dirceu; Resende, Flávio Dutra de; Faria, Marcelo Henrique de; Siqueira, Gustavo Rezende; Almeida, Geraldo Benedito de Souza; Sampaio, Ricardo Linhares; Pacheco, Paulo Santana; Prietto, Murilo Sergio Rodrigues

doi:10.1590/s1516-35982013000400007

Cited by 23 publications

(29 citation statements)

References 25 publications

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“…Likewise, absolute weights of trimmed primal cuts from the pistola hindquarter of the right 1/2 carcass increased linearly with slaughter weight, as a consequence of the greater muscle growth and deposition of adipose tissue in the carcass, as observed in the work of Pazdiora et al (2013). These results are similar to those found by Pascoal et al (2010), who attributed them to a better conformation and to an increase in carcass weight and fat deposition.…”

Section: Discussionsupporting

confidence: 81%

“…Likewise, no significant effect of coated-urea addition was detected on the weight and yield of primal meat cuts, bones, and trimmings. These results may be attributed to similar slaughter weights (518.0 kg), carcass weight (278.1 kg), fat thickness (4.47 mm), and physical composition of animal carcasses (muscle 58.2 %, fat 25.8 %, and bone 15.8 %) (Pazdiora, Resende, Faria, Siqueira, Almeida, Sampaio... & Prietto, 2013).…”

Section: Discussionmentioning

confidence: 60%

“…Authors as Pazdiora et al (2013) for example found greater representativeness of the forequarter as the slaughter weight of the animals increased, which might have been a result of the sexual dimorphism of uncastrated animals, where a more accelerated muscle development of the forequarter is observed in comparison with the pistola hindquarter. However, Pascoal et al (2010) found no differences for percentage of forequarter cuts relative to carcass weight in Braford cattle slaughtered with a carcass weight of 184, 205, and 229 kg.…”

Section: Discussionmentioning

confidence: 96%

“…Knuckle, topside, tenderloin, flank steak, rump, topside, and shin had their percentages decreased as body weight increased, and this response contributed to the linear reduction of the sum of all trimmed cuts from the pistola hindquarter relative to the weight of the cold right 1/2 carcass, likely due to the decreasing representativeness of the pistola hindquarter as slaughter weight of the animal increases (Pazdiora et al, 2013). This might have been due to sexual dimorphism of uncastrated animals, as mentioned previously.…”

Section: Discussionmentioning

confidence: 99%

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Boneless yield of carcass of feedlot-finished young Bos indicus L. bulls

Dirceu-Pazdiora¹,

Resende²,

Faria³

et al. 2018

Acta Agron.

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The aim of this study was to evaluate the boneless yield of the carcass of 64 feedlot-finished young Nellore bulls fed diets containing coated or uncoated urea and slaughtered at five body weights (350, 455, 485, 555, and 580 kg). A completely randomized design with a 5 × 2 factorial arrangement was used. No significant effect was detected for the interaction between slaughter weight and diet; therefore, the variables were analyzed separately, compared by polynomial contrasts and the F test, respectively. The absolute weights of the primal cuts from the fore-and hind-quarter increased linearly as the slaughter weight of the animals increased. Increasing slaughter weights elevated the percentage of rump cap in the pistola hindquarter as well as its yield. The percentages of the rump cap and rump skirt increased linearly, whereas those of knuckle, tenderloin, flank steak, rump, and outside flat decreased and the sum of prime cuts had a quadratic effect in relation to the weight of the right 1/2 carcass. Increasing slaughter weights led to a higher percentage of fat from the trimming of the hindquarter cuts relative to the weight of the 1/2 carcass. The weight of meat cuts was similar between the groups of animals fed coated and uncoated urea. Higher slaughter weights generate heavier meat cuts but lower percentages of primal cuts from the pistola hindquarter relative to the carcass weight.Key words: Animal products; cattle; meat; prime cuts; Nellore breed; diet; minimum weight; optigen®. ResumenEl objetivo de este estudio fue evaluar el rendimiento deshuesado en canal de 64 toros jóvenes Nellore alimentados en corral con dietas que contienen urea recubierta o sin recubrir y sacrificados a cinco pesos corporales (350, 455, 485, 555 y 580 kg). Se utilizó un diseño completamente aleatorizado con un arreglo factorial de 5 × 2. No se detectó ningún efecto significativo para la interacción entre el peso de sacrificio y la dieta; por lo tanto, las variables se analizaron por separado, en comparación con los contrastes polinómicos y la prueba F, respectivamente. Los pesos absolutos de los cortes primarios del cuarto anterior y posterior aumentaron linealmente a medida que aumentaba el peso del sacrificio de los animales. El aumento de los pesos de sacrificio elevó el porcentaje de la tapa de la grupa en el cuarto trasero de la pistola, así como su rendimiento. Los porcentajes de la gorguera y la falda de la rabadilla aumentaron linealmente, mientras que los de nudillo, lomo, filete de flanco, grupa y plano exterior disminuyeron y la suma de los cortes primarios tuvo un efecto cuadrático en relación con el peso de la mitad de la carcasa. El aumento de los pesos de matanza condujo a un mayor porcentaje de grasa del recorte de los cortes del cuarto trasero en relación con el peso de la carcasa 1/2. El peso de los cortes de carne fue similar entre los grupos de animales alimentados con urea recubierta y no recubierta. Los pesos de sacrificio más altos generan cortes de carne más pesados pero porcentajes más bajos de ...

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

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Boneless yield of carcass of feedlot-finished young Bos indicus L. bulls

Dirceu-Pazdiora¹,

Resende²,

Faria³

et al. 2018

Acta Agron.

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“…Carcass yield may be affected by several factors, such as weight of the gastrointestinal content, type of diet, age and weight at slaughter, degree of finishing, breeds, and crossings (Patterson et al, 1995). The weight at slaughter also interferes directly in the carcass yield because heavier animals show greater fat deposition, and, consequently, they have a higher yield (Pazdiora et al, 2013). British breeds and their crosses have a higher fat deposition and higher carcass yield than continental breeds, mainly due to the higher amount of fat in the carcass (Patterson et al, 1995).…”

Section: Resultsmentioning

confidence: 99%

Performance of crossbred steers post-weaned in an integrated crop-livestock system and finished in a feedlot

Costa

Barbosa

Alvarenga

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the performance of crossbred steers post-weaned in an integrated crop-livestock system (ICL) and finished in a feedlot, fed either a high-level concentrate diet or whole corn with no roughage. Weaned calves of two breed groups -½ Angus × ½ Nellore, and ½ Charolais × ¼ Angus × ¼ Nellore -were allotted in a completely randomized experimental design (CRD). During the rainy season, the ½ Angus × ½ Nellore animals showed a higher performance than the ½ Charolais × ¼ Angus ×¼ Nellore ones, with 0.748 and 0.490 kg average daily gain, respectively. The productivity in the post-weaning period was 926 kg ha -1 body weight in a 11-month period, in the ICL system. Subsequently, the animals were confined and fed high-concentrate diet or whole corn with no roughage, in a CRD with a 2×2 factorial arrangement. In the feedlot, the ½ Charolais × ¼ Angus × ¼ Nellore animals showed lower values for carcass average daily gain, carcass yield, and slaughter weight than the ½ Angus × ½ Nellore animals. The high productivity in the ICL shows that this strategy, associated with the use of crossbreeding during the post-weaning and finishing stages, can be indicated for the new demand for a sustainable livestock activity.

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Effect of days in feedlot on growth performance, carcass and meat quality attributes of Tanzania shorthorn zebu steers

Asimwe

Kimambo

Laswai

et al. 2015

Trop Anim Health Prod

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A study was conducted on 50 steers (183 ± 4 kg initial body weight, 3 years of age) to assess effects of days in feedlot on performance, carcass characteristics and meat quality of Tanzania shorthorn zebu (TSZ) cattle with the aim of determining appropriate finishing period. Periods were 0 day (P0), 25 days (P25), 50 days (P50), 75 days (P75) and 100 days (P100) with 10 animals per period. Steers were housed in individual pens, fed with a concentrate diet and hay on an ad libitum basis except the P0 group which was slaughtered at the beginning of trial. Long stay in feedlot, P100, increased concentrate dry matter intake by 2 kg DM/day over short stay, P25. Final weight and total gain increased (P < 0.05) from P25 (22.6 kg) to P100 steers (95.4 kg). Periods had no influence (P > 0.05) on an average daily gain (ADG) and feed conversion ratio (FCR) but affected carcass characteristics. Empty body weight (EBW) and hot carcass weight (HCW) increased by 61 and 65 %, respectively, from no feedlot, P0 to P100. Dressing percentage was high (P < 0.05) for P100 steers. Carcass measurements, internal fat, fat thickness and carcass total fat were the highest (P < 0.05) on P100 steers and the lowest on P0 steers. Rate of pH decline increased with days in feedlot, while cooking loss and shear force values decreased in advanced ageing time. Feedlot periods of 75 and 100 days resulted into high intake, carcass measurements and tenderness, but 100 days further increased carcass fatness and fat thickness levels, thus, with this particular feeding system and animal's condition, 75 days is the recommended period to finish TSZ cattle in feedlots.

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Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights

Cited by 23 publications

References 25 publications

Boneless yield of carcass of feedlot-finished young Bos indicus L. bulls

Boneless yield of carcass of feedlot-finished young Bos indicus L. bulls

Performance of crossbred steers post-weaned in an integrated crop-livestock system and finished in a feedlot

Effect of days in feedlot on growth performance, carcass and meat quality attributes of Tanzania shorthorn zebu steers

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