Níveis de lisina e planos de nutrição para suínos de alto potencial genético para deposição de carne na carcaça dos 21 aos 63 dias de idade

• Ano de defesa: 2011
• Autor(a) principal: Souza, Matheus Faria de
• Orientador(a): Donzele, Juarez Lopes
• Banca de defesa: Brustolini, Paulo César , Silva, Francisco Carlos de Oliveira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Aminoácidos; Leitão; Creche; Desmama
• Palavras-chave em Inglês: Amino acids; Pig; Nursery; Weaning
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5708

Two experiments were conducted to evaluate the levels of lysine and nutrition plans for pigs with high genetic potential for carcass meat deposition, from 21 to 63 days old. In experiment I, we used 144 pigs, 68 barrows and 76 females, commercial hybrids with high genetic potential for carcass meat deposition. Piglets weaned at 21 days of age and with initial weight of 6.15 ± 0.56 kg 6.15 ± 0.56 kg were used. Pigs were allotted in a completely randomized block design, with four treatments, twelve repetitions and three animals (having at least one representative of barrow or female) per experimental unit. The experimental unit was represented by the cage and the formation of blocks was considered as the initial weight. The treatments corresponded to different levels of lysine which consisted of a basal diet and three diets obtained by supplementing the basal diet with L-lysine HCl 78% to replace the starch, resulting experimental diets with levels: 1.200, 1.325, 1.450 and 1.575%. In experiment II, we used 144 pigs, 68 barrows and 76 females, commercial hybrids with high genetic potential for carcass meat deposition. Piglets weaned at 21 days of age and with initial weight of 6.15 ± 0.56 kg 6.15 ± 0.56 kg were used. Pigs were allotted in a completely randomized block design, with four treatments, twelve repetitions and three animals (having at least one representative of barrow or female) per experimental unit. The experimental unit was represented by the cage and the formation of blocks was considered as the initial weight. The treatments consisted of different nutrition plans (sequences of levels of digestible lysine) were recorded in each period of a basal diet and three diets obtained by supplementing the basal diet with L-lysine HCl 78% to replace the starch, resulting in plans nutritional levels of digestible lysine: 1,200-1,100-1,00% 1,325-1,225-1,125% 1,450-1,350-1,250 1,575-1,475-1,375% and% respectively which were provided from 21 to 35, from 36 to 49 and 50 to 63 days. In experiment I, levels of lysine did not influence the daily feed intake (ADFI) and average daily gain (ADG) of animals. It was observed a linear effect of increasing levels of lysine on the daily lysine intake. Feed conversion (F:G) improved linearly with increasing levels of lysine in the diet. However, the data best fit the model Linear Response Plateau, from which it was estimated that the level of digestible lysine for pigs from 21 to 35 days of age is 1.436%. In experiment II, the nutrition plans did not affect the ADFI, ADG and F:G of pigs. Nor was no effect of nutrition plans on the deposition of protein and fat in the carcasses of animals. We conclude that the estimated level of 1.436% digestible lysine corresponding to an intake of 4.25 g of lysine/day provides the best results of feed for pigs with high genetic potential deposition in carcass meat, 21 to 35 days, and the nutrition plan 1.200, 1.100 and 1.000% digestible lysine meets the requirements of pigs with high genetic potential for carcass meat deposition from 21 to 63 days for best results and performance of protein and fat deposition.