Níveis de energia metabolizável para machos de corte de crescimento lento criados em semiconfinamento

Mendonça, Michele de Oliveira; Sakomura, Nilva Kazue; Santos, Fabiana Ramos dos; Freitas, Ednardo Rodrigues; Fernandes, João Batista Kochenborger; Barbosa, N. A. A.

doi:10.1590/s1516-35982008000800014

Cited by 19 publications

(19 citation statements)

References 15 publications

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“…The results for absolute and relative weights of carcass and prime cuts are coherent with that of FC, which the experimental diets were isonutritive, help to explain the present results, since, according to Mendonça et al (2008), the growth of broilers depends on their intake of nutrients and energy.…”

Section: Resultssupporting

confidence: 85%

Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Tizziani

Donzele

et al. 2016

R. Bras. Zootec.

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-This study was conducted to evaluate the effect of reduction of the available phosphorus (avP) in diets supplemented with 500 FTU/kg phytase on performance, carcass characteristics, and bone mineralization of broilers aged 22 to 42 days kept in a high-temperature environment. A total of 336 Cobb broilers with an average initial weight of 0.883±0.005 kg were distributed in a completely randomized design with six treatments -a positive control (0.354 and 0.309% avP without addition of bacterial phytase for the phases of 22 to 33 and 34 to 42 days, respectively), and another five diets with inclusion of phytase (500 FTU) and reduction of the level of avP (0.354, 0.294, 0.233, 0.173, and 0.112%; and 0.309, 0.258, 0.207, 0.156, and 0.106% for the phases of 22 to 33 and 34 to 42 days, respectively) -eight replicates, and seven birds per cage. The experimental diets were formulated to meet all nutritional requirements, except for avP and calcium. Birds were kept in climatic chambers at a temperature of 32.2±0.4 °C and air humidity of 65.3±5.9%. Phytase acted by making the phytate P available in diets with reduction in the levels of avP, keeping feed intake, weight gain, feed:gain, and carcass characteristics unchanged. Treatments affected ash and calcium deposition and the Ca:P ratio in the bone; the group fed the diets with 0.112 and 0.106%, from 22 to 33 and 34 to 42 days of age, respectively, obtained the lowest values, although the phosphorus deposition in the bone was not affected. Diets supplemented with 500 FTU of phytase, with available phosphorus reduced to 0.173 and 0.156%, and a fixed Ca:avP ratio of 2.1:1, meet the requirements of broilers aged 22 to 33 and 34 to 42 days, respectively, reared in a high-temperature environment.

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Section: Resultssupporting

confidence: 85%

Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Tizziani

Donzele

et al. 2016

R. Bras. Zootec.

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“…According to MENDONÇA et al (2007), the amount of deposited fat is directly proportional to the quantity of energy available for the synthesis; therefore, surplus dietary energy is well correlated with the deposition of lipids in most animals.…”

Section: ------------------------------------------------------------mentioning

confidence: 99%

Metabolizable energy levels for meat quails from 15 to 35 days of age

et al. 2016

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“…2 Cálcio (Ca), fósforo (P), proteínas totais (PT), colesterol (Col) e triglicerídeos (Tri) ) e que a exigência para machos Isa Label para esta idade é de 2750 kcal kg -1 (Mendonça et al, 2008), verificase um excedente energético, que provavelmente foi desviado para o metabolismo lipídico, resultando em maior produção de triglicerídeos para deposição nos adipócitos.…”

Section: Resultsunclassified

“…Estas aves possuem características genéticas próprias e, normalmente, apresentam taxa de crescimento mais lenta e menores exigências nutricionais em relação às linhagens comerciais de corte (Santos et al, 2005;Mendonça et al, 2008). Essas características provavelmente influenciem o desenvolvimento do aparelho digestório e também o metabolismo destas aves.…”

Section: Introductionunclassified

Aspectos morfológicos e morfométricos do aparelho digestório, perfil bioquímico sérico e atividade de enzimas pancreáticas de frangos de crescimento lento e rápido

Santos

Stringhini

Freitas

et al. 2015

Agraria

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RESUMOAvaliou-se a alometria de órgãos digestórios e morfometria da mucosa intestinal, atividade de enzimas pancreáticas e perfil bioquímico sérico de frangos de corte de crescimento lento e rápido. O delineamento experimental utilizado foi de blocos ao acaso, com dois tratamentos (linhagens Isa Label e Cobb) e cinco repetições de 10 aves cada. Aos sete, 21 e 42 dias de idade, duas aves por repetição foram abatidas e o sangue e pâncreas foram coletados. As aves de crescimento lento apresentaram maior peso relativo órgãos digestórios, exceto para o peso do fígado e intestino delgado aos sete e 42 dias de idade, respectivamente. A linhagem Cobb apresentou maior altura de vilo no jejuno, íleo aos sete dias e duodeno aos 42 dias de idade. Os níveis séricos de Ca, P e triglicerídeos foram superiores nas aves Isa Label apenas aos 21 dias de idade. O peso relativo, atividade da amilase e lipase do pâncreas não diferiram entre as linhagens. Conclui-se que existem particularidades das linhagens Isa Label e Cobb quanto ao desenvolvimento dos órgãos do sistema digestório e parâmetros séricos bioquímicos. Palavras-chave:Enzimas digestivas, linhagens Isa Label e Cobb, mucosa intestinal, sistema digestório, soro Morphological and morphometric aspects of the digestive apparatus, serum biochemical measures and activity of pancreatic enzymes of slow-and fast-growing broilers ABSTRACTWe evaluated the biometry of digestive organs, morfometry of intestinal mucosa, pancreatic enzymes activity and serum biochemical parameter of slow-and fast-growing chicken genotypes. We used a randomized block experimental design with two treatments (Isa Label and Cobb strains) and five replicates with 10 broilers per experimental unit. In order to measure the evaluated parameters, two birds of each replicate were slaughtered at seven, 21 and 42 d of age. The Isa Label broilers presented relative weight of all components of the digestive tract, except for the weight of the liver and small intestine at seven and 42 days, respectively. Villus height was higher for Cobb than for Isa Label in the jejunum and ileum at seven days, and duodenum at 42 days of age. The relative weight, amylase and lipase activity of the pancreas did not differ between strains at different ages of assessment Relative weight and amylase and lipase activity of pancreas did not differ between strains at different ages. The serum Ca, P and triglyceride levels were higher in Isa Label birds only at 21 days of age. We concluded that Isa Label and Cobb strains present peculiarities regarding the development of the digestive system organs and the serum biochemical parameters.

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Níveis de energia metabolizável para machos de corte de crescimento lento criados em semiconfinamento

Cited by 19 publications

References 15 publications

Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Available phosphorus levels in diets supplemented with phytase for male broilers aged 22 to 42 days kept in a high-temperature environment

Metabolizable energy levels for meat quails from 15 to 35 days of age

Aspectos morfológicos e morfométricos do aparelho digestório, perfil bioquímico sérico e atividade de enzimas pancreáticas de frangos de crescimento lento e rápido

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