Evaluation of the effects of crude protein and lysine on the growth performance of two commercial strains of broilers using meta-analysis

Faridi, A.; Gitoee, A.

doi:10.1016/j.livsci.2015.10.010

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…ISSN 2007 -0705, pp. : 1 -18 -4 -24.1% (Faridi et al, 2012) and 24.5% (Faridi et al, 2015). In another study, Abdel-Maksoud et al (2010) reported maximum body weight in starter broiler chickens with lower dietary CP levels.…”

Section: Introductionmentioning

confidence: 95%

Effect of protein concentrations in the diet on productive performance, carcass characteristics, and meat chemical composition of broiler chickens in the dry subtropics

Infante-Rodríguez

Domínguez-Muñoz

Montaño-Gómez³

et al. 2020

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Introduction: Current diets of broiler chickens tend to increase protein levels to obtain high productive variables that are achieved in combination with genetic, management, and sanitary improvements, among others. An increase in dietary crude protein levels does not always accompany an increase in broiler productive efficiency due to multiple factors involved in the production system. The objective of this study was to evaluate the effect of increasing levels of dietary crude protein (CP) on productive performance, carcass characteristics, and chemical composition of breast and thigh meat in broiler chickens raised in the dry subtropics of northeastern Mexico.Method: The study used 200, 1-day-old male Ross broiler chicks. In a completely randomized design, birds were allocated to the four treatments with five replicates (floor pens) of ten birds each. The trial was divided in two phases (starter and finisher) of 21 days each (42 days total). Treatment diets (T) for starter and finisher phases had crude protein concentrations (CP; %) of 21 and 18.1 (T1), 21.4 and 18.5 (T2), 21.8 and 18.9 (T3), and 22.2 and 19.3 (T4), respectively. Within each feeding phase, the four treatment diets were formulated to similar levels of apparent metabolizable energy.Results: Protein concentrations had no effect (P > 0.05) on weight gain, while feed intake was greater in T1 (P < 0.05) than in T2 and T3. Feed conversion was better in T2 and T4 (P < 0.05) than in T1. There was no influence of treatment on carcass weight or carcass cuts (P > 0.05). Carcass yield was greater in T1 than in T3 (P < 0.05). Breast and thigh dry matter and ether extracts were similar (P > 0.05) between treatments. Breast crude protein was greater (P < 0.05) in T2 than in T3. The lowest (P < 0.05) CP concentration in thigh meat was in T3.Discussion or Conclusion: These results indicated that in the dry subtropics area of northeastern Mexico increases in CP above the level of T2 (21.4% and 18.5% CP in starter and finisher diets, respectively) did not improve broiler chicken productive performance, carcass characteristics or meat chemical composition.

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Section: Introductionmentioning

confidence: 95%

Effect of protein concentrations in the diet on productive performance, carcass characteristics, and meat chemical composition of broiler chickens in the dry subtropics

Infante-Rodríguez

Domínguez-Muñoz

Montaño-Gómez³

et al. 2020

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“…Dietary Lys supplementation enhances cellular and humoral immune responses in broiler chickens (Chen et al 2003;Panda et al 2011;Taghinejad-Roudbaneh et al 2011). Studies with commercial broiler chickens (Faridi et al 2015), local breed of chickens (Nasr & Kheiri 2011;Yuan et al 2015), quails (Mehri et al 2013), turkeys (de Paula Dorigam et al 2016), White Pekin ducks (Xie et al 2009), and local Korean ducks (Wickramasuriya et al 2016) suggested increasing Lys levels to improve average daily gain, feed consumption, and feed efficiency. Moreover, carcass yield, breast meat yield, water-holding capacity, tenderness, and meat taste improved as a result of increasing Lys concentrations, whereas abdominal fat and cooking loss declined which led to enhance meat quality and consumer acceptance (Berri et al 2008;Watanabe et al 2015;Zhai et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Effects of dietary lysine supplementation on performance, egg quality, and development of reproductive system in egg-laying ducks

Fouad

Chen

Ruan

et al. 2017

Journal of Applied Animal Research

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This study was conducted to examine five lysine (Lys) levels (0.75, 0.80, 0.85, 0.90, and 0.95%) to estimate the optimal level of Lys for Longyan laying ducks from 22 to 38 wk of age. Nine hundred Longyan ducks aged 22 wk were assigned randomly to the 5 dietary treatments, where each treatment comprised 6 replicate pens with 30 ducks per pen. Lys had no effects on egg production, egg mass, feed conversion ratio, shape index, Haugh unit, yolk colour, yolk weight, or albumen weight, but the egg weight was improved significantly (P < 0.05) by dietary Lys supplementation, whereas the eggshell thickness, eggshell weight, and eggshell proportion decreased significantly as the Lys levels increased. Dietary supplementation of Lys did not affect the reproductive organ indices or the plasma levels of estradiol, luteinizing hormone, or follicle-stimulating hormone, whereas the plasma level of progesterone declined significantly (P < 0.01) as elevation the concentrations of Lys in the diets. In conclusion, the results indicate that the optimal Lys level in Longyan laying ducks diets is 0.80% to produce eggs with normal egg weight without adverse effects on the eggshell weight, eggshell proportion, or eggshell thickness.

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“…observaram exigência de 1,183% de lisina digestível para GP e CA em frangos de corte machos de 1 a 21 dias de idade, nível semelhante ao obtido porBellaver et al (2002) de 1,18% de lisina digestível.Ambos os níveis não corroboram com os resultados do presente estudo (1,328 e 1,374% para GP e CA, respectivamente). Posteriormente,Goulart et al (2008) observaram nível ótimo de lisina digestível para GP de frangos de corte machos de 1,286 e 1,057% nas fases de 1 a 7 dias e de 8 a 21 dias, respectivamente; eSiqueira et al (2013) estimaram que a melhor resposta para CA é obtida com 1,36 e 1,14% de lisina digestível, para 1 a 7 e 8 a 22 dias, respectivamente Faridi et al (2015). conduziram uma meta-análise de recentes trabalhos sobre proteína bruta e lisina digestível, encontrando níveis ótimos, para frangos de corte de 1 a 21 dias da linhagem Cobb, machos, alimentados com dietas possuindo quantidade semelhante de proteína do presente trabalho, de 1,29; 1,36; e 1,40%, sobre o CR; GP; e CA dos animais, respectivamente.Mais recentemente,Mousa et al (2023) encontraram, na fase inicial de criação (10 a 20 dias de idade), resultados com diferenças significativas (p < 0.001) no ganho de peso entre os grupos que receberam a suplementação de lisina em 10% e 20% acima do nível recomendado (1,54 e 1,68%, respectivamente) no manual da linhagem Arbor Acres em comparação com o grupo controle.…”

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Exigência de lisina digestível de frangos de corte machos de 1 a 21 dias de idade

Caetano

2024

SEAS

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O objetivo deste estudo foi determinar a exigência de lisina digestível para frangos de corte machos sob as características de desempenho, composição corporal e rendimento de carcaça dos animais, de 1 a 21 dias de idade. As dietas diferiram quanto aos níveis de lisina digestível, mantendo-se a relação dos demais aminoácidos com a lisina. Foram utilizados seis níveis de lisina digestível: 1,03; 1,13; 1,23; 1,32; 1,42; e 1,52%. Distribuídos em 36 unidades experimentais de 36 aves cada, 1296 animais da linhagem Cobb – 500® tiveram as seguintes características de desempenho avaliadas: consumo de ração (CR), peso corporal (PC), ganho de peso (GP), conversão alimentar (CA) e viabilidade criatória (VC). Aos 21 dias de idade, foram selecionadas ao acaso cinco aves para avaliação do rendimento de carcaça, e duas para avaliação da composição corporal. Os dados foram submetidos à análise de variância, e havendo diferenças significativas as médias foram comparadas pelo teste de Tukey. A estimativa da exigência de lisina digestível foi realizada utilizando-se modelos de regressão linear ou quadrática. A conversão alimentar foi influenciada, sendo sua exigência maior que para ganho de peso (1,328%), com valor de 1,374%. A lisina digestível não influenciou o rendimento de carcaça neste período, porém, apresentou-se diferenças na deposição proteica na carcaça, com melhores níveis à 1,305%. Níveis maiores que as recomendações conhecidas em âmbito nacional de lisina digestível (1,324%) trouxeram benefícios aos animais sobre conversão alimentar e ganho de peso.

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Evaluation of the effects of crude protein and lysine on the growth performance of two commercial strains of broilers using meta-analysis

Cited by 6 publications

References 23 publications

Effect of protein concentrations in the diet on productive performance, carcass characteristics, and meat chemical composition of broiler chickens in the dry subtropics

Effect of protein concentrations in the diet on productive performance, carcass characteristics, and meat chemical composition of broiler chickens in the dry subtropics

Effects of dietary lysine supplementation on performance, egg quality, and development of reproductive system in egg-laying ducks

Exigência de lisina digestível de frangos de corte machos de 1 a 21 dias de idade

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