Equação de predição da exigência de proteína bruta para aves reprodutoras pesadas na fase de produção

Rabello, Carlos Bôa-Viagem; Sakomura, Nilva Kazue; Longo, Flávio Alves; Resende, K. T.; Couto, Humberto Pena

doi:10.1590/s1516-35982002000500017

Cited by 8 publications

(15 citation statements)

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“…Protein content in the empty body over the slaughters had little variation, although the water content tended to decrease, while fat tended to increase with advancing age of quails. Results confirm previous studies, where the advancing age of poultry causes reduction in the water percentage and increase in fat content (Marks, 1993;Rabello et al, 2002;Silva et al 2004b), which is common for maturity (Bennett & Leeson, 1990). Literature has reported a negative correlation between fat and water contents in the carcass of broilers (Bartov & Plavnik, 1998), growing pullets (Martin et al, 1994;Neme et al, 2006) and laying hens (Chwalibog, 1992).…”

Section: Resultssupporting

confidence: 90%

“…With poultry's advancing age, there Dietary protein requirement for egg production was determined by the use efficiency of crude protein of eggs (Table 7). Therefore, use efficiency of protein for egg production was 43%, close to the 46.8% given by Rabello et al (2002) in breeding broilers. Considering the 11.11% crude protein average value, in other words, 0.111-g crude protein/g egg and 43% use efficiency, 0.258-g dietary crude protein per gram of egg produced was estimated.…”

Section: Resultssupporting

confidence: 53%

“…The value of energy and/or crude protein of eggs (shell + contents) were determined by the product of egg mass vs. average content of energy and/or protein in eggs. The use efficiency of metabolizable energy and crude protein for egg production was calculated based on formulas presented in previous studies (Sakomura et al 2005;Rabello et al, 2002): use efficiency (%) = energy/protein retained in the egg ÷ [energy/protein consumption -(energy demand/protein for maintenance + energy requirement/ protein to gain)].…”

Section: Methodsmentioning

confidence: 99%

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Prediction equations to estimate the demand of energy and crude protein for maintenance, gain and egg production for laying Japanese quails

et al. 2011

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-The study was conducted to estimate requirements of energy and crude protein for maintenance, weight gain and egg production of Japanese quails in the period of 67 to 107 days of age. Two experiments were performed: one, to determine the requirements for maintenance of protein, and the other, for energy. Experiments were conducted in a completely randomized design with four dietary levels of offer and four replicates of six birds. The diets offered were: ad libitum (100%), 75%, 50%, and 25% consumption ad libitum (below maintenance). The methodology used to estimate the demand for maintenance was the comparative slaughter. For estimation of the requirement for weight gain, eight groups of 15 quails were reared separately, fed ad libitum and housed under 22 ºC controlled temperature. From these poultry, three groups were slaughtered at 5, 10, 15, 20, 25, 30, 35 and 40 days of the trial. The requirement for egg production was obtained by taking the ratio of energy content, egg protein, efficiency of energy use and protein for egg production. Prediction equations that estimate maintenance requirement, weight gain and egg production in energy and crude protein of Japanese quail include: metabolizable energy (kcal/bird/day) = 92.34*body weight 0.75 + 6.23*weight gain + 4.19*egg mass; crude protein (g/bird/day) = 6.71*body weight 0.75 + 0.615*weight gain + 0.258*egg mass.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 53%

Section: Methodsmentioning

confidence: 99%

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Prediction equations to estimate the demand of energy and crude protein for maintenance, gain and egg production for laying Japanese quails

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“…Os valores de água e de proteína na carcaça de codornas foram, em média, maiores que os de água (64%) e de proteína (16%), presentes na carcaça de Tabela 2 -Peso vivo inicial (PVI) e final (PVF), consumo de ração (CR), consumo de proteína bruta (CP) e consumo de energia metabolizável (CEM) e respectivos desvios-padrão, em função do nível de oferta (NO) de ração matrizes pesadas às 26 semanas de idade, mas a energia (2,2 kcal/kg) foi menor (Rabello et al, 2002). Conforme se observa na Tabela 4, o ganho de peso e, conseqüentemente, as retenções de proteína e de energia na carcaça reduziram, em conformidade com a redução do nível de oferta de ração de 100 para 40%.…”

Section: Desempenho Das Aves E Composição Corporalunclassified

“…Albino et al (1994), por intermédio do procedimento descrito por Lofgren & Garret (1968), estimaram as exigências diárias em N e energia para mantença e ganho de poedeiras em crescimento, utilizando a metodologia do abate comparativo. Estudos mais recentes têm sido realizados com poedeiras (Basaglia et al, 1998;Silva et al, 1997) e com matrizes pesadas (Rabello et al, 2002), entretanto, apenas um trabalho foi encontrado na literatura utilizando codornas (Farrel et al, 1982, citados por Shim & Vohra, 1984.…”

Section: Introductionunclassified

Exigências de mantença e de ganho em proteína e energia em codornas japonesas (Coturnix coturnix japonica) na fase de 15 a 32 dias

Silva

Filho

et al. 2004

R. Bras. Zootec.

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RESUMO -Um experimento foi realizado com o objetivo de estimar as exigências de proteína e de energia em 128 fêmeas de codornas japonesas na fase de 15 a 32 dias de idade, pelo método fatorial. Utilizou-se um delineamento inteiramente ao acaso com quatro tratamentos, composto por quatro repetições de oito aves. Os tratamentos foram: T 1 = dieta basal (DB) com 24,1% de proteína bruta (PB) e 2.900 kcal de energia metabolizável aparente corrigida pelo balanço de nitrogênio (EMAn) fornecida à vontade; T 2 = 80%; T 3 = 60% e T 4 = 40% do nível de oferta do T 1 (próximo à mantença). No início da fase experimental, quatro grupos (referência) de 15 codornas foram abatidos por deslocamento cervical, sem perdas de penas e de sangue. Para as estimativas das exigências de ganho, doze grupos de 15 codornas foram criados paralelamente, alimentados à vontade, e quatro grupos foram abatidos seqüencialmente no 22 o , 29 o e 32 o dia. As aves de todas as parcelas foram abatidas no 32 o dia, para estimar as exigências de mantença. As equações de predição para estimar as exigências de mantença e de ganho de codornas japonesas de 15 a 32 dias foram, respectivamente: PB (g/ave/d) = 4,752.P 0,75 + 0,843.G e EMAn (kcal/ave/d) = 91,480.P 0,75 + 9,32.G, em que PB é a exigência de proteína bruta; P, o peso vivo (kg); G, o ganho de peso (kg); e EMAn, a energia metabolizável aparente corrigida pelo balanço de nitrogênio (kcal).Palavras-chave: crescimento, deposição de nutrientes, energia, proteína Maintenance and Weight Gain in Crude Protein and Metabolizable Energy Requirements of Japanese Quails (Coturnix coturnix japonica) from 15 to 32 Days of AgeABSTRACT -An experiment was carried out to estimate dietary crude protein and energy requirements of 128 females of Japanese quails from 15 to 32 days of age, by the factorial method. A completely randomized design with four treatments with four replicates of eight birds was used. The treatments were: T 1 = basal diet (BD) with 24.1% CP and 2,900 kcal AMEn ad libitum, T 2 = 80%, T 3 = 60% and T 4 = 40% of T 1 (close to maintenance). In the beginning of the experimental phase, four groups of 15 quails were slaughtered by cervical displacement. Gain requirements were obtained from twelve groups of 15 quails, reared separately and fed ad libitum, therefore, four groups of fifteen birds were slaughtered at 22, 29 and 32 days of age. At the final of the experiment, all birds from pens were slaughtered to estimate the requirements of maintenance by the comparative slaughter methodology. The prediction models to estimate daily requirements of CP and AMEn for Japanese quails maintenance and gain from 15 to 32 days of age were, respectively: CP (g/bird/d) = 4.752.W .75 + 0.865.G and AMEn (kcal/bird/d) = 91.480.W .75 + 8.86.G, where CP is crude protein, W is live weight (kg), G is weight gain and AMEn is apparent metabolizable energy nitrogen-corrected (kcal).

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Modelling of lysine requirement in broiler breeder hens based on daily nitrogen retention and efficiency of dietary lysine utilization

Dorigam

Sakomura

Soares

et al. 2017

Animal Feed Science and Technology

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The current feeding programs used for broiler breeder hens need information on how to make use of the genetic potential more efficiently by modelling the amino acid (AA) requirements. Thus, this study aimed to determine the model parameters for maximum nitrogen retention (NR max T), nitrogen maintenance requirement (NMR) and the efficiency of lysine utilization (bc −1) to determine the lysine (Lys) requirements of broiler breeder hens. Nitrogen balance trials were performed in two periods (I: 31-35 wks and II: 46-50 wks). Seven dietary treatments were used with eight replicates and one hen per cage; the treatments consisted of seven diets with protein levels ranging from 58.8 to 311.9 g/kg of feed, with Lys being limiting in the dietary protein (c = 3.91 g of Lys in 100 g of CP). For each period, nitrogen intake (NI), nitrogen excretion (NEX), nitrogen in egg mass (NEM), nitrogen deposition (ND) and nitrogen retention (NR, NR = ND + NEM + NMR) were obtained in a N balance trial of 25 days. The NMR was calculated as the intersection point of the exponential curve between NEX and NI at NI = 0. The NR max T and b (slope related to protein quality) were estimated by the exponential fit between NR and NI. The Lys efficiency bc −1 was obtained dividing b by c. The likelihood ratio test for the model parameters yielded 255 mg/BW kg 0.67 for NMR, 0.000117 for b and 1684 mg/BW kg 0.67 (period I) and 1484 mg/BW kg 0.67 (period II) for NR max T. The necessary Lys intake dependent on NR and Lys efficiency was derived by the equation Lys = (lnNR max T-ln(NR max T-NR))/(16 × bc −1). Lys intakes required to achieve 0.80 times the maximum potential (NR max T) were 915 mg and 876 mg in the period I and II, respectively. For broiler breeder hens, assuming 0.80 times the NR max T value and average efficiency of Lys utilization, 6.02 g/kg (31-35 wk) and 5.96 g/kg (46-50 wk) digestible dietary Lys were observed as optimal digestible Lys concentration in the diet (corresponding to 152 and 147 g of daily feed intake, respectively). Results of model calculations need verification in performance trials with evaluation of nitrogen deposition and varying dietary Lys efficiencies.

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Equação de predição da exigência de proteína bruta para aves reprodutoras pesadas na fase de produção

Cited by 8 publications

References 9 publications

Prediction equations to estimate the demand of energy and crude protein for maintenance, gain and egg production for laying Japanese quails

Prediction equations to estimate the demand of energy and crude protein for maintenance, gain and egg production for laying Japanese quails

Exigências de mantença e de ganho em proteína e energia em codornas japonesas (Coturnix coturnix japonica) na fase de 15 a 32 dias

Modelling of lysine requirement in broiler breeder hens based on daily nitrogen retention and efficiency of dietary lysine utilization

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