Níveis de lisina digestível com dois balanços eletrolíticos para pintos de corte na fase inicial, de 1 a 21 dias de idade

Campestrini, Evandro; Barbosa, Maria José Baptista; Nunes, Ricardo Vianna; Gasparino, Eliane; Silva, Wagner Thiago Mozer da; Khül, Rodrigo

doi:10.1590/s1516-35982010000100020

Cited by 5 publications

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References 10 publications

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“…Among them, it can be highlighted the metabolizable energy content and electrolyte balance of diets, sanitation status, temperature and environmental conditions, breed, sex and age of the birds (Campestrini et al, 2010;Meza et al, 2015). Thus, the short period of adjustment of lysine levels without maintaining the relationship with the other amino acids, combined with the maturity of the chickens that are usually slaughtered at younger ages, may also have contributed to the lack of effect on performance and carcass yield of the chickens.…”

Section: Resultsmentioning

confidence: 99%

<b>Digestible lysine for broilers from different commercial strains in the final phase

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Vaz

et al. 2016

Acta Sci. Anim. Sci.

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ABSTRACT. This study aimed to evaluate different digestible lysine levels in diets for broilers chickens from different commercial strains, from 49 to 56 days of age, on performance and carcass characteristics. A total of 432 male broilers from 49 days old were used, with an average weight of 3560±250 g. It was used a completely randomized design in a factorial arrangement 3x4, and the birds, from three strains (Cobb 500, Hubbard Flex and Ross 308) were divided into four levels of digestible lysine (0.800, 0.950, 1.100 and 1.250%), with four replicates of 12 birds each. It was evaluated the weight gain, feed intake, feed conversion ratio, carcass yield, breast yield, breast meat yield and the yield of the thigh and drumstick. There was no interaction between lysine levels and commercial strains of broiler chickens. The different lysine levels did not influence (p ≥ 0.05) performance and carcass yield. There are significant differences between strains for feed intake and carcass characteristics. The Cobb 500 strain had higher breast yield and breast meat (p < 0.05), while the Hubbard Flex and Ross 308 strains had higher yield of the thigh and drumstick (p < 0.05).Keywords: amino acids, breast meat, performance, genotypes, carcass yield.Lisina digestível para frangos de corte de diferentes linhagens na fase final de criação RESUMO. Objetivou-se avaliar diferentes níveis de lisina digestível em rações para frangos de corte de diferentes linhagens comerciais na fase de 49 a 56 dias de idade sobre o desempenho e características de carcaça. Foram utilizados 432 frangos de corte machos de 49 dias de idade, com peso médio inicial de 3560±250 g. Utilizou-se o delineamento inteiramente casualizado em arranjo fatorial 3x4, sendo que as aves, oriundas de três linhagens (Cobb 500, Hubbard Flex e Ross 308), foram distribuídas em quatro níveis de lisina digestível (0,800; 0,950; 1,100 e 1,250%), com quatro repetições de 12 aves cada. Avaliou-se o ganho de peso, o consumo de ração, a conversão alimentar, o rendimento de carcaça, o rendimento de peito, o rendimento de carne de peito e o rendimento de coxa e sobrecoxa. Não houve interação entre os níveis de lisina digestível e as linhagens comerciais de frangos de corte. Os diferentes níveis de lisina não influenciaram (p ≥ 0,05) o desempenho e rendimento de carcaça. Existem diferenças significativas entre as linhagens para consumo de ração e características de carcaça. Sendo que a linhagem Cobb 500 teve maior rendimento de peito e carne de peito (p ≤ 0,05), enquanto as linhagens Hubbard Flex e Ross 308 tiveram maior rendimento de coxa e sobrecoxa (p ≤ 0,05).Palavras-chave: aminoácido, carne de peito, desempenho, genótipos, rendimento de carcaça.

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Section: Resultsmentioning

confidence: 99%

<b>Digestible lysine for broilers from different commercial strains in the final phase

Dalólio

Moreira

Vaz

et al. 2016

Acta Sci. Anim. Sci.

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“…Broilers require more dietary lysine during early growth stages, lysine dietary level depends on the parameters measured, such as weight gain, abdominal fat, and feed conversion ratio (Campestrini et al, 2010). The balance of dietary amino acids is also important, because inadequate ratios among amino acids may negatively affect bird performance, and cause locomotion, feathering, and immunity problems (Kidd & Fancher, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effects of dietary lysine on broiler performance and carcass yield - meta-analysis

Mendes

Api

Silva

et al. 2014

Rev. Bras. Cienc. Avic.

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There has been a great evolution and improvement in the nutrition of poultry and lysine has been used the reference amino acid to increase animal protein deposition. Therefore, a meta-analysis was performed with the objective of studying the effect of different dietary lysine levels on the performance and carcass yield of broiler chickens. In total, 21 studies published in Brazil since 1999 were included. Bird performance considered daily weight gain (178 observations) and feed conversion ratio (188 observations) results. Carcass quality was evaluated relative to carcass yield (24 observations), abdominal fat (24 observations) and breast meat yield (30 observations). Data were checked for normality and were submitted to analysis of variance. Weight gain and carcass yield increased with the addition of 1.05% of lysine to the diet, whereas feed conversion ratio and abdominal fat were reduced as dietary lysine concentration increased. The results, therefore, indicate that lysine is essential in bird nutrition and significantly affects bird performance and carcass yield.

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Effect of concentrate supplementation on performance and ingestive behaviour of lambs grazing tropical Aruana grass (Panicum maximum)

et al. 2016

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The aim of this study was to evaluate the effects of concentrate supplementation on the performance and ingestive behaviour of lambs grazing tropical grasslands of Panicum maximum cv. IZ-5 and its effect on pasture characteristics. Different levels of daily supplementation with concentrate were compared: no supplementation; or supplemented at 1.5% and 2.5% of lamb liveweight. The grazing simulation technique was used for qualitative assessment of the pasture every 28 days. Herbage mass, pasture growth rate, sward height as well as botanical and morphological composition of the pasture were evaluated. Average daily gain, gain per hectare and ingestive behaviour were measured on the lambs. The forage supply was 4% of green leaves (4 kg dry matter per 100 kg of liveweight) in all treatments. Six 3–4-month-old Texel and Corriedale lambs were used per paddock. The design was a randomised block design with three replications. Concentrate supplementation had a direct effect on pasture structure, especially height (significant interaction treatment vs period – P = 0.0373). In the treatment without supplementation, the animals grazed for a longer period than the others. Idle time was higher in the treatment with the highest level of supplementation, and rumination time was similar among the treatments. Supplementation with 2.5% significantly increased the average daily gain (0.143 g vs 0.026 g for no supplementation) and gain per hectare (30 kg vs 258 kg for no supplementation vs supplementation at 2.5% of lamb liveweight, respectively). The results show the potential increase in production and productivity with the use of concentrate supplementation at 2.5% lamb bodyweight. Notwithstanding the increase in production, supplementation with concentrate provided a strong negative impact on pasture structure and behaviour of animals that should be considered when using concentrate supplementation for finishing lambs in tropical regions.

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Níveis de lisina digestível com dois balanços eletrolíticos para pintos de corte na fase inicial, de 1 a 21 dias de idade

Cited by 5 publications

References 10 publications

<b>Digestible lysine for broilers from different commercial strains in the final phase

<b>Digestible lysine for broilers from different commercial strains in the final phase

Effects of dietary lysine on broiler performance and carcass yield - meta-analysis

Effect of concentrate supplementation on performance and ingestive behaviour of lambs grazing tropical Aruana grass (Panicum maximum)

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