Níveis de lisina digestível para frangos de corte machos no período de 37 a 49 dias de idade

One thousand and fifteen commercial male broilers from 37 to 49 days of age were used to evaluate different digestible lysine levels. A completely randomized trial was used, with five treatments (0.90, 0.95, 1.00, 1.05 and 1.10% of digestible lysine, respectively), seven repetitions and 35 experimental units, with 29 birds each. Lysine levels were added in isoenergetic (3,250 kcal of ME/kg) and isoproteic (18% of CP) corn and soy meal rations. Weight gain, feed intake, feed:gain ratio, carcass characteristics and cuts, body composition and nutrient deposition were measured. Digestible lysine levels influenced the feed:gain ratio, with decreasing linear effect. Quadratic effect was observed due to lysine levels used on carcass characteristics, cuts and abdominal fat deposition. The variable chemical composition of the carcass, empty body and mineral matter showed quadratic effect on the digestible lysine levels. The digestible lysine levels had no effect on the chemical composition of blood and offal fractions. However, evidences of linear increase in the protein deposition of carcass and empty body due to the increase in the digestible lysine level were observed. Considering performance, the digestible lysine level should be 1.10% or higher.

[1]  Eliana Aparecida Schammass,et al.  Níveis de lisina para leitões na fase inicial-1 do crescimento pós-desmame: composição corporal aos 11,9 e 19,0 kg , 2004 .

[2]  A. A. Mendes,et al.  Efeito da linhagem e do nível de lisina da dieta sobre a qualidade da carne do peito de frangos de corte , 2003 .

[3]  J. Donzele,et al.  Digestible lysine levels in diets maintaining or not the amino acids relation for broilers from 22 to 42 days of age kept under heat stress , 2003 .

[4]  Roberta Gomes Marçal Vieira Vaz,et al.  Níveis de lisina digestível em rações, em que se manteve ou não a relação aminoacídica, para frangos de corte de 1 a 21 dias de idade, mantidos em estresse por calor , 2003 .

[5]  L. Albino,et al.  Níveis dietéticos de lisina para frangos de corte de 1 a 21 e 22 a 40 dias de idade , 2001 .

[6]  L. Albino,et al.  Níveis de lisina para frangos de corte de 1 a 21 e 15 a 40 dias de idade , 2000 .

[7]  L. Albino,et al.  Exigência nutricional de lisina digestível para frangos de corte , 2000 .

[8]  M. Pack,et al.  Ideal amino acid profile and dietary lysine specification for broiler chickens of 20 to 40 days of age. , 1999, British poultry science.

[9]  B. Leclercq,et al.  Lysine: Specific effects of lysine on broiler production: comparison with threonine and valine. , 1998, Poultry science.

[10]  P. Waldroup,et al.  Influence of dietary lysine levels and arginine:lysine ratios on performance of broilers exposed to heat or cold stress during the period of three to six weeks of age. , 1997, Poultry science.

[11]  S. Leeson,et al.  Broiler response to energy or energy and protein dilution in the finisher diet. , 1996, Poultry science.

[12]  M. Tokach,et al.  The use of compositional growth curves for assessing the response to dietary lysine by high-lean growth gilts , 1996 .

[13]  J. Holsheimer,et al.  Effect of dietary energy, protein, and lysine content on performance and yields of two strains of male broiler chicks. , 1992, Poultry science.

[14]  E. Moran,et al.  Live Performance and Carcass Yield of Male Broilers from Two Commercial Strain Crosses Receiving Rations Containing Lysine Below and Above the Established Requirement Between Six and Eight Weeks of Age , 1991 .

[15]  M. E. Jackson,et al.  The effects of dietary methionine and lysine on broiler chicken performance and breast meat yield. , 1990 .

[16]  E. Moran,et al.  Processing Losses, Carcass Quality, and Meat Yields of Broiler Chickens Receiving Diets Marginally Deficient to Adequate in Lysine Prior to Marketing , 1990 .

[17]  L. S. Jensen,et al.  Influence on performance of three to six-week-old broilers of varying dietary protein contents with supplementation of essential amino acid requirements. , 1989, Poultry science.