Growth and Feed Efficiency of Cattle of Different Mature Sizes

Thonney, M. L.; Heide, E. K.; Duhaime, D. J.; Nour, A. Y. M.; Oltenacu, P.A.

doi:10.2527/jas1981.532354x

Cited by 24 publications

(32 citation statements)

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“…As animals approach maturity and as genotype differences in tissue composition of the liveweight gain become more marked, the more mature genotypes would be expected to exhibit greater decreases in both appetite and feed efficiency. For example, Thonney et al (1981), when they compared Angus and Holsteins at the same liveweight, reported lower feed intakes and growth rates and higher feed conversion ratios in the more mature Angus. Genotype differences in tissue composition of liveweight gain of these animals will be discussed in a later paper.…”

Section: Discussionmentioning

confidence: 99%

Comparative performance of five genotypes of Indonesian large ruminants. 1. Effect of dietary quality on liveweight and feed utilization

Moran¹

1985

Aust. J. Agric. Res.

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Diets containing 85% (high concentrate) or 30% (high roughage) concentrate were individually fed for 280 or 224 days, respectively, to young Madura, Ongole, Bali, Grati (or Friesian crossbred) and swamp buffalo bulls. Each feeding trial was divided into early or late periods to study the effects of approaching maturity on growth and feed use. The digestibility of dietary nutrients, the balances of nitrogen, phosphorus and calcium, and the metabolizability of the gross energy of the high-roughage diet were measured.Growth rates in decreasing order were Grati, Ongole, buffalo, Bali and Madura. Genotype differences in growth were generally the result of variations in intake rather than in feed use. There were genotype x trial interactions in feed intake and liveweight gain during the latter part of each trial in that on the high-concentrate diet, the performance of Ongole and Madura bulls was poorer than that of the Grati and buffalo bulls whereas performances were similar on the high-roughage diet. Dietary metabolizable energy contents were estimated to be 11.8 and 9.5 MJ kg-' dry matter for the two diets, respectively.Liveweights were higher and more divergent between genotypes at the end of the high-concentrate feeding period. As they were also higher than those reported for mature animals maintained under traditional village management, it was concluded that indigenous Indonesian large ruminants would respond to improved feeding and management. However, their feedlot performances would be unlikely to equal that of dairy crossbred cattle.

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Section: Discussionmentioning

confidence: 99%

Comparative performance of five genotypes of Indonesian large ruminants. 1. Effect of dietary quality on liveweight and feed utilization

Moran¹

1985

Aust. J. Agric. Res.

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“…Due to the relatively small between-breed variation in (AB), compared to the between-breed variation in A ( Table 1), differences between the breeds in gross efficiency are reduced when compared at the same proportion of maturity, relative to comparisons at the same live weight. Other studies have also concluded that the between-breed variation in gross food efficiency is largely a reflexion of the comparisons being made at different stages of maturity (Thonney, Heide, Duhaime, Nour and Oltenacu, 1981).…”

Section: Merinomentioning

confidence: 98%

Food intake, growth and mature size in Australian Merino and Dorset horn sheep

Thompson

Parks

1983

Anim. Sci.

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The pattern of food intake as a function of age, and live weight as a function of food consumed was examined from soon after weaning to maturity in groups of fine and strong wool Merino rams and Dorset Horn rams and wethers. Each group, which initially comprised 20 sheep and from which individuals were removed for slaughter at approximately 6-kg increments in live weight, was fed a pelleted ration ad libitum for 98 and 77 weeks for the Merino and Dorset Horn groups respectively.The pattern of food intake was similar for all groups of sheep, in that food intake increased to a maximum at approximately 50 weeks of age and then declined with age with a regular oscillation superimposed on this curve. In all three groups of rams, but not in the Dorset Horn wethers, the oscillations in food intake were on an approximate annual cycle with a decrease in food intake in summer and an increase in winter.Estimated mature live weights for the strong and fine wool Merino rams were 120-5 and 97-6 kg, and for the Dorset Horn rams and wethers 108-6 and 101-4 kg. Variation between breeds in the level of food intake, food efficiency and consequently the pattern of growth, was largely a function of mature size. The Dorset Horn rams were slightly more efficient at converting food to live weight than the wethers.

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“…Las canales de novillos Braford presentaron un nivel de engrasamiento significativamente mayor (P< 0.001) que el registrado en canales de novillos Criollo Argentino, resultados coincidentes con los obtenidos por Gárriz et al (1984; y que tienen una estrecha relación con el tamaño corporal y el grado de madurez (Thonney et al, 1981).…”

Section: Resultados Y Discusiónunclassified

Características de la canal y rendimiento en cortes comerciales en novillos Criollo Argentino y Braford criados en sistemas extensivos ecológicos

Orellana

Blanco²,

García³

et al. 2009

Agraria

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Características de la canal y rendimiento en cortes comerciales en novillos Criollo Argentino y Braford criados en sistemas extensivos ecológicos RESUMENSe estudiaron las características de las canales y el rendimiento en cortes comerciales de novillos de raza Criollo Argentino y Bradford criados en un sistema extensivo ecológico sin suplementación. Los novillos se sacrificaron a una edad media de 898 días y un peso de 401 kg. La valoración de las canales de novillos Braford fue superior a la de novillos Criollo Argentino, lo que repercutió en el precio (1.47 dólares.kg -1 vs. 1.42 dólares.kg -1 canal, respectivamente). Las canales de novillos Criollo Argentino proporcionaron porcentajes superiores de cortes de Primera categoria (51.0% vs. 49.4%) y menores para las piezas de Segunda (26.9% vs. 27.6%) y Tercera categoria (22.1% vs. 23.2%). Así mismo, las canales de novillos Criollo Argentino presentaron menor cantidad de grasa (3.9% vs. 5.5%) y mayor porcentaje de carne vendible (86.7% vs. 85.6%), lo que motivo un mayor precio medio de la carne (2.78 dólares.kg -1 carne vs. 2.76 dólares.kg -1 carne). En sistemas extensivos sin suplementación y en las condiciones de la experiencia, las canales de novillos Braford presentaron un mayor rendimiento y nivel de engrasamiento, mientras que las canales de novillos Criollo Argentino proporcionaron mayor porcentaje de carne vendible. En conjunto, los ingresos obtenidos con novillos Braford fueron superiores a los registrados con novillos Criollo Argentino. Palabras clave: bovinos, despieceCarcass characteristics and commercial meat yield in Criollo Argentino and Braford steers reared in extensive ecologic system AB S TR ACTWe studied carcass characteristics and commercial joints of Criollo Argentino and Braford steers reared in an extensive ecologic system, without supplementation. Steers were slaughtered at an average age of 898 days and weighing 401 kg. The Braford steers had higher scores for carcass assessments and higher percentages for carcass yield and excess fat on the carcass than Criollo Argentino steers, which resulted in the price (1.47 dollars.kg -1 vs. 1.42 dollars.kg -1 channel, respectively). The carcasses of Criollo Argentino steers had higher percentages of prime category cuts (51.0% vs. 49.4%) and lower of second (26.9% vs. 27.6%) and third category cuts (22.1% vs. 23.2%). The carcasses of Criollo Argentino steers had less fat (3.9% vs. 5.5%) and highest percentage of salable meat (86.7% vs. 85.6%), which cause a higher purchase prices of meat (2.78 dollars.kg -1 meat vs. 2.76 dollars.kg -1 meat). In extensive systems without supplementation and the terms of the experience, the carcasses from Braford steers had a higher yield and fatness, while the carcasses from Criollo Argentino steers provided greater percentage of salable meat. Overall, revenue from Braford steers were higher than those registered with Criollo Argentino steers.

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Growth and Feed Efficiency of Cattle of Different Mature Sizes

Cited by 24 publications

References 0 publications

Comparative performance of five genotypes of Indonesian large ruminants. 1. Effect of dietary quality on liveweight and feed utilization

Comparative performance of five genotypes of Indonesian large ruminants. 1. Effect of dietary quality on liveweight and feed utilization

Food intake, growth and mature size in Australian Merino and Dorset horn sheep

Características de la canal y rendimiento en cortes comerciales en novillos Criollo Argentino y Braford criados en sistemas extensivos ecológicos

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