Valine Deficiency.

Farran, M. T.; Thomas, Owen

doi:10.3382/ps.0711885

Cited by 23 publications

(16 citation statements)

References 13 publications

(13 reference statements)

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“…The effects that poultry may incur as a consequence of a nutritional deficiency or imbalance of Val in growth and carcass yields have also been elucidated [7,[10][11][12][13][14][15]. Until now, however, all the nutritional needs of Val in poultry have been supplied by protein-contributing ingredients such as soybean meal and animal by-products.…”

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confidence: 99%

Nutritional feasibility of l-valine inclusion in commercial broiler diets

Corzo

Dozier

Mejía

et al. 2011

Journal of Applied Poultry Research

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Ingredient prices and availability have fluctuated during the last few years. Often, the industry has found itself with high ingredient prices and with few options to reduce diet cost effectively. When the spread of corn, soybean meal, and fat is wide, a reduction in CP via l-Thr is an effective formulation strategy that can maintain broiler performance, can alleviate diet costs, and does not interfere with feed milling logistics and throughput. Roughly a decade ago, the industry began implementing the inclusion of l-Thr as an alternative to diet cost reduction, successfully reducing the amounts of soybean meal and animal by-products in commercial di- SUMMARYResearch addressing the application of crystalline l-Val as a feed-grade amino acid to commercial broiler diets has not been known. An experiment was conducted to assess whether l-Val would adequately support growth if included in practical broiler diets, and if so, to pinpoint a recommended level of inclusion for l-Val. Male broilers were fed common diets up to 28 d of age, and were then fed one of various l-Val inclusion levels ranging from 0 to 1.3 kg/ metric ton until 42 d of age. This was accomplished by blending a diet with no l-Val with one that contained 1.3 kg of l-Val. As a result, equal levels of dietary Val were present in all diets, concomitant with decreases in other limiting dietary amino acids (Ile, Arg, or both). After data were analyzed, linear decreases for BW gain, feed intake, carcass weight, breast meat weight, and breast meat yield were observed as levels of l-Val were increased in the diet. For live performance and carcass traits, we observed that an l-Val inclusion level of 0.52 kg/metric ton supported adequate growth and meat yield when compared with a diet devoid of l-Val. Inclusion levels of l-Val greater than 0.52 kg/ton resulted in poorer feed conversion, breast meat weight, and breast meat yield. Based on these results, l-Val supplementation at levels below 0.52 kg/ metric ton showed the ability to support good production and could potentially offer a useful diet cost reduction alternative.

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confidence: 99%

Nutritional feasibility of l-valine inclusion in commercial broiler diets

Corzo

Dozier

Mejía

et al. 2011

Journal of Applied Poultry Research

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“…This interaction indicates that proper ratios between these amino acids may be important to promote optimal bone development of broilers from day 1 to 21 post‐hatch, resulting in bone with greater resistance. Inappropriate ratios of BCAA can reduce the activity of osteoblasts, resulting in birds with leg problems (Farran & Thomas, ).…”

Section: Resultsmentioning

confidence: 99%

“…In addition to leucine, valine may also influence bone metabolism. Farran and Thomas () reported a reduction in bone calcium and ash concentrations and lower bone weight of birds fed a valine‐deficient diet, suggesting a decrease in osteoblast activity by the low levels of this amino acid. The role of BCAA on bone metabolism has been seldom studied and it is unclear whether the leucine and valine interaction may interfere with bone development in birds as well as their mechanism of action.…”

Section: Introductionmentioning

confidence: 99%

Tibiotarsus bone characteristics and tibial dyschondroplasia incidence of broilers fed diets supplemented with leucine and valine

Ospina-Rojas

Murakami

Duarte

et al. 2017

Animal Physiology Nutrition

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Two experiments were conducted to study the effect of standardized ileal digestible (SID) leucine and valine levels on tibiotarsus bone characteristics and the incidence of tibial dyschondroplasia of broilers from day 1 to 21 (Experiment I) and day 21 to 42 post-hatch (Experiment II). Each experimental phase was evaluated independently. In both experiments, a total of 1,500 one-day-old Cobb 500 male broiler chickens were distributed in a completely randomized design 5 × 5 factorial arrangement for a total of 25 treatments. The SID leucine and valine levels were ranged from 10.0 to 19.6 g/kg, and 6.0 to 12.0 g/kg from day 1 to 21 post-hatch, respectively, while day 21 to 42 post-hatch ranged from 10.0 to 18.0 g leucine/kg, and 5.2 to 11.2 g valine/kg. Serum calcium and phosphorus, bone concentrations of calcium, phosphorus and ash, diameter and Seedor index of the tibiotarsus were not affected (p > .05) by the treatments at 21 or 42 days of age. There was an interaction (p ≤.06) between the SID levels of leucine and valine on tibiotarsus breaking strength at 21 days, but not at 42 days of age (p > .05). Tibiotarsus breaking strength was maximized in broilers from day 1 to 21 with the dietary levels of leucine and valine at 14.2 and 9.0 g/kg respectively. Dietary leucine levels reduced linearly (p < .05) the hypertrophic zone of tibiotarsus cartilage at 21 days of age. Therefore, leucine and valine supplementation interact positively on bone strength of broilers from day 1 to 21 post-hatch. Leucine can be a useful amino acid for reducing the hypertrophic cartilage zone in broilers from day 1 to 21, but not from day 21 to 42 post-hatch.

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“…Essa limitação é particularmente evidente para aves mais velhas quando a proteína da dieta diminui e os grãos utilizados como fonte de energia aumentam em participação na constituição da dieta. Dietas inadequadas em valina para aves não só reduziram o ganho de peso e piorou a conversão alimentar, como também determinaram anormalidades das pernas e empenamento das aves (Anderson andWarnick, 1967, Robel, 1977) Thomas, 1992a, Farran andThomas, 1992b). Leclercq (1998) também observou redução no desempenho de frangos de corte alimentados com dietas deficientes em valina, mas não mencionou efeito sobre o empenamento e problemas de pernas.…”

Section: Introductionunclassified

Relación de valina y lisina en las dietas de codornices japonesas

Paula¹,

Barreto

Reis

et al. 2017

Pubvet

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RESUMO.Foi conduzido um experimento no Setor de Avicultura do Departamento de Zootecnia da Universidade Federal de Viçosa -UFV, objetivando-se estabelecer a razão de valina digestível com lisina digestível em rações para codorna japonesa na fase de postura. Foram utilizadas 480 codornas com idade inicial de 284 dias. As aves foram distribuídas em delineamento experimental inteiramente casualizados com seis tratamentos, dez repetições e oito aves por unidade experimental. Os tratamentos consistiram de uma ração basal deficiente em valina, com 18,6% de proteína bruta e 2900 kcal de EM/kg, suplementada com cinco níveis de L-valina (0,051; 0,101; 0,151; 0,202 e 0,252%) em substituição ao ácido glutâmico, em equivalente proteico, correspondendo às relações de valina digestível com lisina digestível de 0,75; 0,80; 0,85; 0,90; 0,95; 1,00%, respectivamente, permanecendo as rações isoproteicas e isocalóricas, sendo a lisina digestível fixada em 1,00%. Os parâmetros estudados foram: consumo de ração (g/ave/dia), produção de ovos por ave dia (%), produção de ovos comercializáveis (%), peso do ovo (g), massa de ovos (g/ave/dia), conversão alimentar por massa de ovos (kg de ração/kg de ovos), conversão alimentar por dúzia de ovos (kg de ração/dz de ovos), variação do peso corporal (g), peso dos componentes (g) e percentagem dos componentes dos ovos (gema, albúmen e casca) e gravidade específica (g/cm3). Não foram observadas mudanças significativas nos parâmetros avaliados em função das diferentes relações de valina com lisina digestível estudadas. Concluiu-se que a razão de valina digestível com lisina digestível de 0,75 na ração, proporciona resultados satisfatórios de desempenho e de qualidade de ovos para codornas japonesas em postura. Palavras-chave: Aminoácido, codorna japonesa, produção de ovos, valinaRatio of valine to lysine in diets for laying Japanese quail ABSTRACT. To determine the relationship valine to lysine for Japanese quails during the period of production, it was conducted an experiment in DZO-UFV using 480 subspecies Japanese quails (Coturnix coturnix japonica) with, 284 days of age. The birds were distributed in a completely randomized design with six treatments (relationships of valine to lysine), ten replicates and eight birds per experimental unit. The treatments consisted of a basal diet deficient in valine with 18.6% crude protein and 2900 kcal metabolizable energy/kg, supplemented with five levels of L-Valine (0.051, 0.101, 0.151, 0.202 and 0.252%) corresponding to the ratio of valine to lysine of 0.75; 0.80, 0.85, 0.90, 0.95 and 1.00% respectively, and the lysine set at 1.00%. The variables studied were: feed intake (g/bird/day), egg production per bird day (%), production of commercial eggs (%), egg

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Valine Deficiency.

Cited by 23 publications

References 13 publications

Nutritional feasibility of l-valine inclusion in commercial broiler diets

Nutritional feasibility of l-valine inclusion in commercial broiler diets

Tibiotarsus bone characteristics and tibial dyschondroplasia incidence of broilers fed diets supplemented with leucine and valine

Relación de valina y lisina en las dietas de codornices japonesas

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