Eficiência de utilização da energia metabolizável para ganho de peso e exigências de energia metabolizável, nutrientes digestíveis totais e proteína metabolizável de bezerros da raça holandesa

Signoretti, Ricardo Dias; Silva, José Fernando Coelho da; Filho, Sebastião de Campos Valadares; Pereira, José Carlos; Araújo, Gherman Garcia Leal de; Cecon, Paulo Roberto; Queiróz, Augusto César de

doi:10.1590/s1516-35981999000100030

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…With the exception of NRC (2001), these values are all consistent with the values obtained in the present study; yet, none of these studies discriminates differences between milk and starter feed. The efficiency of use of the metabolizable energy is influenced by several factors such as the environment, the muscle work performed by the animal (Signoretti et al, 1999), and the metabolizability of the diet [i.e., the ratio of ME to gross energy (ARC, 1980)]. Garrett and Johnson (1983) stated that the metabolizability of the diet directly influences the efficiencies of energy use, but its effect is more pronounced on the efficiency of use of ME for gain than on efficiency of use of ME for maintenance, and this response was also observed in the present study.…”

Section: Energy Requirementsmentioning

confidence: 99%

Determination of energy and protein requirements for crossbred Holstein × Gyr preweaned dairy calves

Silva

Marcondes

Detmann

et al. 2017

Journal of Dairy Science

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The objective was to quantify the energy and protein nutritional requirements of Holstein × Gyr crossbred preweaned dairy calves until 64 d of age. Thirty-nine Holstein × Gyr crossbred male calves with an average initial live weight (mean ± SEM; for all next values) of 36 ± 1.0 kg were used. Five calves were slaughtered at 4 d of life to estimate the animals' initial body composition (reference group). The remaining 34 calves were distributed in a completely randomized design in a 3 × 2 factorial arrangement consisting of 3 levels of milk (2, 4, or 8 L/d) and 2 levels of starter feed (presence or absence in diet). At 15 and 45 d of life, 4 animals from each treatment were subjected to digestibility trials with total collection of feces (for 72 h) and urine (for 24 h). At 64 d of age, all animals were slaughtered, their gastro-intestinal tract was washed to determine the empty body weight (EBW; kg), and their body tissues were sampled for subsequent analyses. The net energy requirement for maintenance was estimated using an exponential regression between metabolizable energy intake and heat production (both in Mcal/EBW per d) and was 74.3 ± 5.7 kcal/EBW per d, and was not affected by inclusion of starter feed in the diet. The metabolizable energy requirement for maintenance was determined at the point of zero energy retention in the body and was 105.2 ± 5.8 kcal/EBW per d. The net energy for gain was estimated using the EBW and the empty body gain (EBG; kg/d) as 0.0882 ± 0.0028 × EBW × EBG. The metabolizable energy efficiency for gain (k) of the milk was 57.4 ± 3.45%, and the k of the starter feed was 39.3 ± 2.09%. The metabolizable protein requirement for maintenance was 3.52 ± 0.34 g/BW per d. The net protein required for each kilogram gained was estimated as 119.1 ± 32.9 × EBW. The metabolizable protein efficiency for gain was 77 ± 8.5% and was not affected by inclusion of starter feed in the diet. In conclusion, the energy efficiency for gain of milk is higher than that of starter and the net protein required per unit protein gain increases with empty body weight.

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Section: Energy Requirementsmentioning

confidence: 99%

Determination of energy and protein requirements for crossbred Holstein × Gyr preweaned dairy calves

Silva

Marcondes

Detmann

et al. 2017

Journal of Dairy Science

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“…The processes of rumination and digestion are related to the calorie increment and the reduction in the efficiency of metabolizable energy use to maintain the animals [ 22 ]. Thus, the addition of cactus cladodes in ruminant diets can reduce heat production by decreasing rumination and increasing caloric increment [ 31 ]. Moreover, the energy spent on thermoregulatory processes should be redirected to the production of meat or milk.…”

Section: Discussionmentioning

confidence: 99%

Nutritive Value, In Vitro Fermentation, and Methane Production of Cactus Cladodes, Sugarcane Bagasse, and Urea

Siqueira

Chagas

Monnerat

et al. 2021

Animals

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This study evaluated the effect of different roughages fed to sheep on nutrient and water intake, ingestive behavior, nitrogen balance, microbial protein synthesis, fermentation parameters, and methane production using an in vitro gas production system. The treatments consisted of five diets: cactus cladodes Nopalea (NUB) and Opuntia (OUB), both with the addition of sugarcane bagasse (SB) and urea/ammonium sulfate (urea/as); Tifton hay (TH); corn silage (CS); and sorghum silage (SS), also with added urea/as. The NUB provided greater (p ≤ 0.03) intakes of dry matter (1024 g/d), digestible organic matter (670 g/d), and crude protein (161 g/d) than those on the SS. The NUB provided greater (p < 0.01) dietary water intake (3023 g/d) than TH. The time spent on rumination was shorter (p < 0.01), and the idle time was longer in animals fed NUB and OUB than TH and CS. Microbial protein synthesis was not affected (p = 0.27). The final pH (6.4) of the incubation fluid and the concentration of NH3-N (39.05 mg/dL) were greater for NUB and OUB. Ruminal parameters and methane production were little or not affected by tested forages. We recommend using cactus cladodes in combination with sugarcane bagasse and urea/as in sheep diets.

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Exigências líquidas de proteína e energia para crescimento de tourinhos santa gertrudis em dietas de alto teor de concentrado

Berndt¹,

Henrique²,

Leme

et al. 2002

R. Bras. Zootec.

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RESUMO -Foram utilizados 32 tourinhos Santa Gertrudis inicialmente com dez meses de idade e 245 kg de peso, alimentados em confinamento com dietas contendo 88% de concentrado. Quatro animais foram abatidos no início do experimento (linha base) para estimativa da composição corporal inicial. Os 28 animais restantes foram distribuídos em baias individuais com delineamento de blocos ao acaso em arranjo fatorial 2x2 (dois volumosos x dois processamentos do milho grão) com sete repetições. Os volumosos incluíam silagem da planta de milho ou bagaço de cana-de-açúcar e os dois processamentos do grão de milho, o grão colhido seco e triturado e o colhido e ensilado úmido. Estimou-se, por intermédio da regressão do logaritmo do conteúdo corporal de energia, em função do logaritmo do peso do corpo vazio, o conteúdo de energia e proteína para ganho de peso em qualquer faixa de peso vazio incluída neste trabalho: para ganho de 1 kg, em um animal de 300 kg, foram necessárias 3,64 Mcal/dia de energia e 129,5 g de proteína.Palavras-chave: bagaço de cana, bovinos, confinamento, exigências, milho de alta umidade Net Protein and Energy Requirements for Growth of Santa Gertrudis Young Bulls FedHigh Concentrate Diets ABSTRACT -Thirty two Santa Gertrudis bulls with ten months of age and 245 kg average live weight were fed 88% concentrate diets with corn silage or sugarcane bagasse and dry corn or high moisture corn. Four animals were slaughtered in the beginning of the experiment for initial body composition determination. Other 28 animals were distributed on four treatments. The experimental design was randomized blocks in 2 X 2 factorial (two roughage X two corn sources) with seven replicates. Regression equation of log body energy content as a function of log empty body weight (EBW) provided estimation of body energy content at any EBW range included in this research: for weight gain of 1 kg, an animal of 300 kg requires 3.64 Mcal/day of energy and 129.5 g of protein.

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Eficiência de utilização da energia metabolizável para ganho de peso e exigências de energia metabolizável, nutrientes digestíveis totais e proteína metabolizável de bezerros da raça holandesa

Cited by 3 publications

References 5 publications

Determination of energy and protein requirements for crossbred Holstein × Gyr preweaned dairy calves

Determination of energy and protein requirements for crossbred Holstein × Gyr preweaned dairy calves

Nutritive Value, In Vitro Fermentation, and Methane Production of Cactus Cladodes, Sugarcane Bagasse, and Urea

Exigências líquidas de proteína e energia para crescimento de tourinhos santa gertrudis em dietas de alto teor de concentrado

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