Níveis de lisina para frangos de corte nos períodos de 22 a 42 e de 43 a 49 dias de idade

Costa, Fernando Guilherme Perazzo; Amarante, Valene da Silva; Nascimento, Germano Augusto Jerônimo do; Brandão, Patrícia Araújo; Barros, Leilane Rocha; Silva, José Humberto Vilar da; Costa, Jeronimo S.

doi:10.1590/s1413-70542006000400024

Cited by 11 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The average yield carcass in this study in both slaughter (70 days = 68.61% and 84 days = 70.82%) were higher than those reported by Madeira et al (2010) at 84 days of age to three free-range lineage, Master Griss (67.95%), Label Rouge (68.99%) and Red Heavy (69.82%). The linear increase for breast yield obtained in this study in chickens slaughtered at 84 days of age are in agreement with the results of Costa et al (2006). However, Takahashi et al (2006) found no significant differences in free-range chickens slaughtered at 70 and 84 days old, although there was difference in relation to these chickens from Ross lineage that got higher yield.…”

Section: Effects Of Different Lysine Values On Carcass Characteristicssupporting

confidence: 90%

Digestible lysine for broiler chickens with lower genetic potential grown on free-range system

et al. 2016

View full text Add to dashboard Cite

Determining the actual lysine requirement is crucial as it is an essential amino acid and plays animportant role in the metabolism of broilers. In addition, it is the second limiting amino acid for broilers fed with rations formulated basedon corn and soybean meal. The aim of this study was to determine the digestible lysine requirement for male broilers with lower genetic potential for growth in a semiconfined system as well as to evaluate the effects of different values of digestible lysine on performance and carcass characteristics. A total of 300 broiler chickensfrom a commercial lineage EMBRAPA 041 were used with an average initial weight of 987 g. The broilers were distributed into 20 experimental units in a completely randomized design with five treatments (0.586; 0.746; 0.906; 1.066, and 1.226% digestible lysine), four replicates and 15 broilers per experimental unit.In both periods, there were linear effect of digestible lysine values on the lysine intake and lysine utilization efficiency and quadratic effect on final body weight, weight gain and feed: gain ratio.There was a quadratic effect on the absolute weight of carcasses, breast, thigh + drumstick and income gizzard.For rearing of male broilers with lesser genetic growth potential reared in semi-confinement, rations with 1.040% and 1.103% digestible lysine can be recommended for maximum weight gain in periods from 35 to 70 and 35 to 84 days of age, respectively.Index terms: Amino acids; nutritional requirements; performance; yield. RESUMOA determinação da real exigência de lisina é fundamental, por ser um aminoácido essencial e desempenhar importantes funções no metabolismo dos frangos de corte. Além disto, apresenta-se como segundo aminoácido limitante para frangos de corte alimentados com rações formuladas a base de milho e farelo de soja. O objetivo deste estudo foi determinar a exigência de lisina digestível para frangos de corte machos de menor potencial genético para crescimento em sistema semiconfinado, bem como avaliar os efeitos de diferentes valores de lisina digestível sobre o desempenho e características de carcaça. Foram utilizados 300 frangos de corte, da linhagem comercial EMBRAPA 041, com pesoinicial médio de 987 g. Os frangos foram distribuídos em 20 unidades experimentais em um delineamento inteiramente casualizado, com cinco tratamentos (0,586; 0,746; 0,906; 1,066 e 1,226% de lisina digestível), quatro repetições e quinze frangos por unidade experimental. Nos dois períodos avaliados, verificaram-se efeito linear dos níveis de lisina digestível sobre a ingestão e eficiência na utilização de lisina, e efeito quadrático sobre peso vivo final, ganho de peso e a conversão alimentar. Verificou-se efeito quadrático sobre os pesos absolutos da carcaça, peito, coxa+sobrecoxa e rendimento da moela. Podem ser recomendadas, respectivamente, para máximo ganho de peso rações com 1,040% e 1,103% de lisina digestível nos períodos de 35 aos 70 e 35 aos 84 dias de idade.Termos para indexação: Aminoácidos; exigência nutricional; desempenho...

show abstract

Section: Effects Of Different Lysine Values On Carcass Characteristicssupporting

confidence: 90%

Digestible lysine for broiler chickens with lower genetic potential grown on free-range system

et al. 2016

View full text Add to dashboard Cite

show abstract

“…(8) The lowest abdominal fat levels were obtained with 1.28% dietary lysine ( Figure 5). The obtained abdominal fat results are consistent with the findings of Barboza et al (2000) and Costa et al (2006). Almeida et al (2002) found that increasing dietary lysine levels up to 1.00% allow for the reduction of abdominal fat in broilers.…”

Section: Valériosupporting

confidence: 91%

“…(4) Those authors stressed that lysine levels should not be lower than 1.10% or a total of 29.6 grams during the finisher phase (35 to 47 days). Costa et al (2006) also reported that feed conversion ratio improved with increasing lysine levels, as described by the first order (p<0.01) equation: FC = 1.57+ 0.29 lysine levels (R 2 = 0.75) eq. (5) Nascimento (2003) found that increasing dietary lysine levels promoted higher muscle deposition and weight gain, and reduced abdominal fat, leading to better feed conversion ratio.…”

Section: Goulartmentioning

confidence: 91%

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

Mendes

Api

Silva

et al. 2014

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

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.

show abstract

“…Positive effect of increase in the dietary lysine levels, with or without supplementation of industrial amino acids, on the FC of growing broilers has been reported by several researchers (Leclercq et al, 1998;Rezaei et al, 2004;Lana et al, 2005;Costa et al, 2006;Assis et al, 2008;Balbino et al, 2008;Viola et al, 2009a;Ghahri et al, 2010).…”

Section: Resultsmentioning

confidence: 83%

Digestible lysine levels obtained by two methods of formulation of diets for 22-to-42-day-old broilers

Oliveira

Donzele

et al. 2014

R. Bras. Zootec.

View full text Add to dashboard Cite

-The objective of this study was to evaluate the effect of digestible lysine levels in diets with or without supplementation of industrial amino acids on performance, carcass characteristics and nitrogen excretion in broilers of 22 to 42 days of age. Birds were distributed in a completely randomized experimental design in a 4 × 2 factorial arrangement, with four digestible lysine levels (9.0, 10.0, 11.0 and 12.0 g/kg) and two methods to obtain the lysine levels (variation in the proportion of corn and soybean meal, without supplementation; or supplementation of industrial amino acids), eight replicates and 20 birds per replicate. There was an interaction effect on the performance characteristics and on the weights and yields of prime cuts. In both diets, feed conversion improved linearly as the lysine levels were increased. Feed intake; weight gain; carcass, thigh and drumstick weights; and boneless breast yield increased and abdominal fat reduced linearly as the lysine levels were increased in the unsupplemented diet. The lysine levels of the supplemented diets linearly reduced the yield of drumstick and quadratically reduced the yields of bone-in and boneless breast up to the estimated levels of 10.4 and 10.7 g/kg, respectively. Diets without supplementation increased the excretion and retention of nitrogen. The levels of 9.0 and 12.0 g/kg digestible lysine obtained with supplementation of industrial amino acids and without it, respectively, provide the best performance and yield of prime cuts in the birds. Diets in which the digestible lysine levels are obtained without supplementation provide better performance responses and carcass characteristics compared with supplemented diets.

show abstract

Níveis de lisina para frangos de corte nos períodos de 22 a 42 e de 43 a 49 dias de idade

Cited by 11 publications

References 11 publications

Digestible lysine for broiler chickens with lower genetic potential grown on free-range system

Digestible lysine for broiler chickens with lower genetic potential grown on free-range system

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

Digestible lysine levels obtained by two methods of formulation of diets for 22-to-42-day-old broilers

Contact Info

Product

Resources

About