Influence of roughage and grain processing in high-concentrate diets on the performance of long-fed Holstein steers1

Traxler, M. J.; Fox, D. G.; Perry, Ted C.; Dickerson, R.; Williams, D. L.

doi:10.2527/1995.7371888x

Cited by 18 publications

(17 citation statements)

References 22 publications

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“…Performance results in this study corroborate data of Turgeon et al (2010), who observed that WSC diets without forage reduced DMI and increased feed efficiency by 3.5% compared with diets that included forage. In another study, which evaluating the use of diets based on WSC without forage, Traxler et al (1995) found no effect on the ADG.…”

Section: Resultsmentioning

confidence: 91%

Performance, carcass characteristics, and ruminal pH of Nellore and Angus young bulls fed a whole shelled corn diet1

Carvalho

Chizzotti

Schoonmaker

et al. 2016

Journal of Animal Science

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The objectives of this study were to test the interaction of breed (Nellore or Angus) and diet (whole shelled corn [WSC] or ground corn [GC] with silage) on growth performance, carcass characteristics, and ruminal pH of young bulls. Thirty-six bulls (18 Nellore and 18 Angus) with the range in age of 18 to 22 mo and BW of 381 ± 12 kg were used in a completely randomized design experiment with a 2 × 2 factorial arrangement of treatments (2 breeds and 2 diets). Experimental diets (DM basis) included 1) a GC diet containing 30% corn silage and 70% GC- and soybean meal-based concentrate and 2) a WSC diet containing 85% WSC and 15% of a soybean meal- and mineral-based pelleted supplement. An additional 8 bulls were slaughtered at the beginning of the experimental period for determination of initial carcass weight. The treatments were Nellore fed the GC diet, Nellore fed the WSC diet, Angus fed the GC diet, and Angus fed the WSC diet. Greater DMI ( < 0.01), ADG ( < 0.01), and G:F ( < 0.01) were observed in Angus bulls compared with Nellore bulls, regardless of diet. Lower average ruminal pH ( = 0.04), maximum ruminal pH (P = 0.02), and DMI ( < 0.01) were observed in bulls fed the WSC diet than in those fed the GC diet. In addition, bulls fed the WSC diet had greater G:F ( < 0.01). The WSC diet led to greater variation in DMI compared with the GC diet ( < 0.01). Omasum and large intestine percentage was affected by diets only in the Angus breed ( < 0.02) and were greater when bulls were fed the GC diet. The WSC diet without forage may be useful for feedlots because this diet promoted greater G:F than the GC diet, regardless of breed. However, special care must be exercised in feed management during adaptation and throughout the feeding of Nellore animals to avoid digestive disorders and fluctuations in DMI.

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Section: Resultsmentioning

confidence: 91%

Performance, carcass characteristics, and ruminal pH of Nellore and Angus young bulls fed a whole shelled corn diet1

Carvalho

Chizzotti

Schoonmaker

et al. 2016

Journal of Animal Science

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“…In South America, the use of WSC diets is more recent, but it has been increasing in the last years. Previous studies have shown that animals fed WSC diets are more efficient (Traxler et al, 1995;Turgeon et al, 2010). However, most of the studies on WSC diets used taurine cattle, and only a few were carried out using Bos taurus indicus.…”

mentioning

confidence: 99%

Blood parameters of Angus and Nellore young bulls fed diets with or without forage.

et al. 2019

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We evaluated blood parameters of Angus and Nellore bulls fed diets with and without forage. Forty animals with initial body weight (BW) of 380±16.2 kg were housed in individual stalls. Eight bulls of each breed were fed a whole shelled corn (WSC) diet [850 g kg −1 of WCS and 150 g kg −1 of a pellet based on soybean meal, dry mater (DM) basis] or a ground corn with silage (GC) diet (300 g kg −1 of silage and 700 g kg −1 of a concentrate based on corn and soybean meal, DM basis), ad libitum, and four animals of each breed were limited-fed the GC diet [feed restriction (FR), 55% of the DM intake of bulls fed ad libitum, adjusted for the metabolic BW]. Intake was measured daily, and a metabolism trial was conducted with total collection of feces and urine to estimate the ruminally degraded and undegraded protein (intake and nitrogen balance). Blood samples for determination of hormones and metabolites were collected. The data were analyzed using the GLM procedure of SAS adopting a significance level of 0.05. The diet affected only the serum concentrations of triglycerides, HDL, and VLDL, with limitedfed animals presenting smaller concentrations than ad libitum-fed bulls. No difference in blood parameters was observed between animals fed WSC or GC diets. Nellore bulls presented greater T4, cholesterol, HDL, LDL, and serum urea nitrogen concentrations than Angus. Feeding finishing beef cattle with no-roughage diets does not alter their blood parameters. Also, our results support that Zebu cattle might have lower serum removal of nutrients due to a lesser demand for fat and protein deposition than Bos taurus taurus.

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“…Num trabalho de validação do CNCPS, que faz parte do nível 2 do NRC (1996), o programa superestimou em 10% o ganho de peso de bovinos em pastagem temperada em função do consumo de energia metabolizável . Para bovinos em confinamento, o NRC (1984) subestimou em 4% o consumo de matéria seca e em 12,4% o ganho de peso (Traxler et al, 1995), e o NRC (1996) subestimou a eficiência alimentar (ganho/consumo) em 13 e 23%, pelos níveis 1 e 2 do mesmo (Lana et al, 1997).…”

Section: Resultsunclassified

Sistema de Suplementação Alimentar para Bovinos de Corte em Pastejo: Validação

Lana

2002

R. Bras. Zootec.

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RESUMO -Objetivou-se com este trabalho a validação do programa de computador do Sistema Viçosa de Formulação de Rações, bem como testar o NRC 1996 de gado de corte, incluindo os níveis 1 (Sistema NRC) e 2 (Sistema Cornell), para bovinos de corte em pastejo. Os dados de ganho de peso preditos pelos programas, em função do peso corporal, dos grupos genéticos e da composição e do consumo de suplementos, durante o período da seca, foram comparados com os dados observados. O Sistema NRC, níveis 1 e 2, subestimou o consumo de matéria seca em 12 e 13% e o ganho de peso, em 55 e 86%, respectivamente, de 35 novilhos suplementados em pastagens durante o período da seca. Já o Sistema Viçosa, com menor margem de erro, superestimou o consumo em 5% e subestimou o ganho em 11%. Em um segundo ensaio de validação com um banco de dados de 25 experimentos, 74 tratamentos e 1230 animais, o Sistema Viçosa superestimou o ganho de peso, em função do consumo de energia (NDT), em 44%. Apesar disto, o programa é adequado para ser utilizado nas formulações de suplementos alimentares para bovinos em crescimento em pastagens tropicais, uma vez que o consumo de alimentos e, conseqüentemente, o ganho de peso são altamente variáveis, devido à variação na disponibilidade e composição das pastagens, diversidades climáticas e genéticas dos animais.Palavras-chave: banco de dados, consumo, ganho de peso, pastejo, uréia A System of Feed Supplementation for Beef Cattle under Grazing. ValidationABSTRACT -This work had as objective to validate the computer program of Sistema Viçosa de Formulação de Rações, as well as the 1996 beef NRC, including levels 1 (NRC system) and 2 (Cornell System) for growing beef cattle under pastures. The data of daily gain predicted by the programs as a function of body weight, genetic groups and supplements composition and intake during the dry season were compared to the observed values. The levels 1 and 2 of NRC system underpredicted dry matter intake in 12 and 13% and daily gain in 55 and 86%, respectively, of 35 supplemented steers in tropical pastures during the dry season. The Viçosa system overpredicted intake in 5% and underpredicted daily gain in 11%, with lower error. In a second validation assay with a data base of 25 experiments, 74 treatments and 1230 animals, the Viçosa system overpredicted the daily gain as a function of energy intake (TDN), in 44%. In spite of that, the program is adequate to be utilized in formulation of feed supplements for growing bovines in tropical pastures, as feed intake and so, daily gain are highly variable, due to variation in pastures availability and composition, and diversity of climate and animal genetic.

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Influence of roughage and grain processing in high-concentrate diets on the performance of long-fed Holstein steers1

Cited by 18 publications

References 22 publications

Performance, carcass characteristics, and ruminal pH of Nellore and Angus young bulls fed a whole shelled corn diet1

Performance, carcass characteristics, and ruminal pH of Nellore and Angus young bulls fed a whole shelled corn diet1

Blood parameters of Angus and Nellore young bulls fed diets with or without forage.

Sistema de Suplementação Alimentar para Bovinos de Corte em Pastejo: Validação

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