Dieta aminoacídica na determinação da perda endógena ileal de frangos de corte: uma proposta metodológica

Brito, Cláudson Oliveira; Albino, Luiz Fernando Teixeira; Rostagno, Horácio Santiago; Gomes, Paulo Cézar; Nery, Lidson Ramos; Silva, Eliane Aparecida da

doi:10.1590/s1516-35982009001100013

Cited by 5 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However [73] suggest the PFD technique associated with amino acid supplementation, as being the one that best estimates the endogenous loss of amino acids by birds.…”

Section: Amino Acids Methodologies: Digestibilitymentioning

confidence: 99%

Amino Acid for Japanese Quails: Methodologies and Nutritional Requirement

Vieira¹,

Costa²,

Lima³

et al. 2017

Amino Acid - New Insights and Roles in Plant and Animal

View full text Add to dashboard Cite

The methodologies applied to chickens and laying hens, to determine the digestibility and requirement of protein and amino acids are used with quails, however, they need a more careful evaluation due to peculiarities inherent to the Coturnix genus, in order to provide consistent results. The nutritional requirements of the birds are determinate using the dose-response and the factorial method. Several mathematical models and techniques of diet formulation are allied to the dose-response method in determining nutritional requirements. The curvilinear (hyperbolic) models beter portray population behaviour in response to increasing nutrient doses in diets. The reading model, allow a beter estimation of the requirement, in relation to the mathematical models used in the dose-response method. The techniques of comparative slaughter and nitrogen balance are efective in determining the nutritional requirements of quails, however, the later need to be corrected by the loss of nitrogen in the feathers in determining the requirements of crude protein and amino acids for maintenance. The protein-free diet, coupled with the industrial amino acid supplementation, provides more robust digestibility values, since it more efectively predicts the endogenous excretion patern.

show abstract

“…However [73] suggest the PFD technique associated with amino acid supplementation, as being the one that best estimates the endogenous loss of amino acids by birds.…”

Section: Amino Acids Methodologies: Digestibilitymentioning

confidence: 99%

Amino Acid for Japanese Quails: Methodologies and Nutritional Requirement

Vieira¹,

Costa²,

Lima³

et al. 2017

Amino Acid - New Insights and Roles in Plant and Animal

View full text Add to dashboard Cite

show abstract

“…Entre estes métodos incluem-se ensaios de crescimento, ensaios químicos e microbiológicos, quantificação de aminoácidos do sangue e o balanço nutricional, no qual os aminoácidos provenientes da coleta ileal ou das excretas, são mensurados. Porém, cada método apresenta princípios e limitações que resultam em diferentes valores (Engster et al, 1985;Rostagno et al, 1995;Brito et al, 2009).…”

Section: Introductionunclassified

“…Engster et al (1985) mencionam como ponto falho do método, o desconhecimento da contribuição dos aminoácidos microbianos na excreta e a possível influência dos aminoácidos urinários e endógenos no processo de determinação. Atualmente, estes fatores são corrigidos pelo uso de galos adultos cecectomizados e parcelas de animais em jejum para determinação das perdas endógenas e metabólicas (Sakomura & Rostagno, 2007) ou mesmo com utilização de dietas isentas de proteína (Brito et al, 2009).…”

Section: Introductionunclassified

Digestibilidade dos aminoácidos do milho, farelo de soja e gérmen integral de milho em galos e frangos de corte cecectomizados

Brito¹,

Stringhini

Xavier³

et al. 2011

R. Bras. Zootec.

View full text Add to dashboard Cite

RESUMO -Este experimento foi conduzido para avaliar a digestibilidade dos aminoácidos do milho, farelo de soja e gérmen integral de milho em galos e frangos de corte cecectomizados. Digestibility of amino acids from corn, soybean meal and corn germ meal in cecectomized roosters and broilersABSTRACT -This experiment was carried out to evaluate the digestibility of the amino acids from corn, soybean meal and corn germ meal in cecectomized roosters and broilers. The experiment used sixteen Lohmann-LSL roosters with 45 weeks of age, 20 AgRoss 508 male broilers with 21 days of age and 20 other male broilers of same line, with 42 days of age, all of them cecectomized. A completely randomized arrangement with three animal categories (roosters; chickens at 21 and 42 days of age) was adopted for each feedstuff analyzed. Each bird represented an experimental unit. The trial had a duration of 84 hours; in the first 36 hours roosters and chickens were submitted to fasting for intestinal cleaning. After this, birds were forced to ingest 30 grams of each ingredient with an esophageal probe, introduced directly into the crop. During the subsequent 48 hours, the excreta produced was collected twice a day. The values for true digestible amino acids were reduced for corn and full-fat corn germ meal when determined with broilers submitted to the experimental procedures at 21 days of age compared to the control group (adult cockerels). But, the same results were not been observed for soybean meal. In general, the true digestible amino acid values were higher when determined with broilers at 42 days of age compared to adult cockerels. The total amount of true digestible amino acids determined were 7.24; 6.25 and 7.33% for corn, 9.66; 9.14 and 9.91% for corn germ meal and 41.82; 41.78 and 42.02% for soybean meal, values determined with roosters, and broilers at 21 and 42 days of age, respectively. It was observed that as the gastrointestinal tract is mature, the amino acid digestibility of birds that consumed corn and corn germ meal is enhanced.

show abstract