Digestible valine-to-digestible lysine ratios in brown commercial layer diets

Lelis, Guilherme Rodrigues; Albino, L. F. T.; Tavernari, F. de C.; Calderano, Arele Arlindo; Rostagno, Horácio Santiago; Barros, V.R.S.M.; Maia, Rosana Cardoso

doi:10.3382/japr.2014-00984

Cited by 14 publications

(19 citation statements)

References 4 publications

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“…This adjustment may produce different amino acid ratio recommendations (Lelis et al., 2014). According to Euclydes and Rostagno (2001), the choice of the model depends on the relationship between the levels of the studied nutrient and the evaluated responses.…”

Section: Discussionmentioning

confidence: 99%

“…Many statistical models have been developed to determine the requirements of amino acids and proteins in humans (Elango et al., 2012 ) and animals, but the choice of method will depend essentially on the species to be worked on, application facilities, and best fit of the data. This adjustment may produce different amino acid ratio recommendations (Lelis et al., 2014 ). According to Euclydes and Rostagno ( 2001 ), the choice of the model depends on the relationship between the levels of the studied nutrient and the evaluated responses.…”

Section: Discussionmentioning

confidence: 99%

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Estimation of optimal ratios of digestible phenylalanine + tyrosine, histidine, and leucine to digestible lysine for performance and breast yield in broilers

et al. 2017

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Three experiments were carried out to estimate the optimal ratios of digestible phenylalanine + tyrosine (Phe + Tyr), histidine (His), and leucine (Leu) relative to digestible lysine (Lys) for performance and carcass criteria of Cobb-500 broilers from 8 to 17 d of age. In each experiment, 160 male chicks were allocated to a completely randomized experimental design with eight replicate pens, each receiving five dietary treatments. A common, semi-purified basal diet was formulated to meet all dietary recommendations except for those of the tested amino acids (i.e., Phe + Tyr, His, and Leu). Growth performance and carcass characteristics data were analyzed using various requirement-estimation models, including 95% of the quadratic regression, linear response plateau (LRP; i.e., stepwise regression), LRP-to-quadratic regression ratio; and quadratic broken line (QBL). Graded digestible Phe + Tyr ratios elicited a quadratic response (P < 0.05) in body weight gain and linear responses (P < 0.05) in breast and breast fillet weights. Linear effects (P < 0.05) were also observed when graded ratios of digestible His were fed for feed intake and weight gain, and quadratic responses (P < 0.05) were noted for feed conversion ratio and breast and breast fillet weights and yields. Graded Leu ratios elicited quadratic responses (P < 0.05) in feed intake, weight gain, and breast and breast fillet weight and yield. Based on growth and carcass parameters, the estimated ideal digestible ratios of Phe + Tyr, His, and Leu relative to digestible Lys were 112, 38, and 104%, respectively, for broiler chicks raised from 8 to 17 d of age.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Estimation of optimal ratios of digestible phenylalanine + tyrosine, histidine, and leucine to digestible lysine for performance and breast yield in broilers

et al. 2017

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“…These results suggest that more studies are needed to update the nutritional recommendations for these AA. Preliminary studies reported the importance of updating the percentage ratios of amino acids to Lys for laying hens and broilers due to the genetic improvements on birds utilized on poultry production (Tavernari et al, 2013;Campos et al, 2012;Lelis et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

“…Preliminary studies have shown the possibility to reduce dietary protein levels when crystalline AA are added to feed (Tavernari et al, 2013;Lelis et al, 2014) but this practice for laying hens is influenced by the bird's feed intake, being necessary adjust the crude protein level according to the hen feed intake.…”

Section: Introductionmentioning

confidence: 99%

Niveles de proteína bruta en dietas para gallinas ponedoras

et al. 2016

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El objetivo de este trabajo fue evaluar niveles de proteína bruta (PB) en gallinas ponedoras Hy-Line W-36 de 27 a 43 semanas de edad. 180 aves fueron distribuidas en un diseño en bloques con tres tratamientos, 10 repeticiones y seis animales por cada uno. Los niveles nutricionales fueron los adecuados excepto para la PB. Los niveles evaluados fueron 152, 172 y 182 g/kg PB. Fue estimado el consumo de pienso (CP, g/día), producción de huevos (PDH, g/kg), peso de huevo (PH, g), masa de huevo (MH, g/día), conversión alimenticia (CA, kg/kg y kg/docena), peso de yema (g/kg de PH), de cáscara (g/kg de PH) y de albumen (g/kg de PH). El consumo no fue influenciado por los niveles de PB de las dietas (p>0,05). El PH, MH, CA y Peso de albumen, no fueron afectados (p>0,05) por el nivel de PB de los piensos. Las aves alimentadas con dietas con 172 g/kg PB mostraron mejoras (p>0,05) en el PDH en un 2.35 % en comparación al nivel de 152 g/kg PC. El aumento de PB mejoró (p

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“…Moreover, Abdel-Mageed et al (2009) found that higher protein levels in the diets increased egg yolk and reduced albumen percentages in eggs of laying quails. Lelis et al (2014) stated no influence of extra Val. supplementation on yolk, albumen, or egg shell percentages.…”

Section: Egg Quality and Incubation Measurementsmentioning

confidence: 99%

Productive and Reproductive Responses of Breeder Japanese Quails to Different Dietary Crude Protein and L-Valine Levels

Hanafy

Attia

2018

EPSJ

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The outcomes of dietary crude protein levels (CP; 18 and 20%) and Lvaline (Val.; 0, 0.1 and 0.2%) supplementation on the productive/reproductive performance, egg quality and some blood parameters of breeder Japanese quails were evaluated from 14 to 28 weeks of age. One hundred forty-four birds were individually weighed and randomly distributed into six treatment groups with eight replicates each of two females and one male. Body weight, egg weight and percentages of fertility, hatchability and total embryonic mortality were not influenced by treatments. However, significant interactions due to CP and Val. levels on egg production percentage, egg mass, chick weight and egg quality traits were obtained. Quails fed 18% CP + 0.2% Val. diets had better feed and valine intake, FCR, shell thickness and yolk index. Sexual libido, foam production, sperm concentration and motility percentage and methylene blue reaction time (MBRT) did not differ due to treatments while cloacal gland area and semen ejaculate volume of male quail were significantly improved by 18% CP level. No differences between treatments were observed for blood urea and albumin concentrations of male and female. In contrast, total protein and Superoxide dismutase (SOD) concentrations increased significantly in response to Val. levels and were also enhanced differently in the blood of male and female. Superoxide dismutase concentration in the plasma of male was not influenced by treatments while plasma female's SOD was significantly elevated due to 18 % CP + 0.2 % Val. diet. The results indicated that dietary 18% CP with 0.2% L-valine was suitable for breeder quails at 14-28 weeks of age.

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Digestible valine-to-digestible lysine ratios in brown commercial layer diets

Cited by 14 publications

References 4 publications

Estimation of optimal ratios of digestible phenylalanine + tyrosine, histidine, and leucine to digestible lysine for performance and breast yield in broilers

Estimation of optimal ratios of digestible phenylalanine + tyrosine, histidine, and leucine to digestible lysine for performance and breast yield in broilers

Niveles de proteína bruta en dietas para gallinas ponedoras

Productive and Reproductive Responses of Breeder Japanese Quails to Different Dietary Crude Protein and L-Valine Levels

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