Exigência de metionina mais cistina digestíveis para suínos machos castrados de alto potencial genético, dos 60 aos 95 kg

• Ano de defesa: 2005
• Autor(a) principal: Santos, Fabrício de Almeida
• Orientador(a): Donzele, Juarez Lopes
• Banca de defesa: Donzele, Rita Flávia Miranda de Oliveira , Silva, Francisco Carlos de Oliveira , Ferreira, Aloízio Soares , Brustolini, Paulo César
• 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 sulfurados; Características de carcaça; Desempenho; Terminação
• Palavras-chave em Inglês: Amino acids; Carcass caracteristics; Performance; Swine; Nutritional requirements
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5785

Seventy castrated barrows were used to determinate the requirements of digestible methionine and cystine with initial weight 60,00 ± 1,13 kg. The animals were experimental design of randomized blocks with five treatments (0,440; 0,464; 0,488; 0,512 and 0,536% of digestible methionine and cystine corresponding at the 55,0; 58,0; 61,0; 64,0 and 67,0% of digestible methionine and cystine : digestible lysine) with seven replicates and two animals by experimental unity. The digestible methionine and cystine levels influenced the feed: gain and lean yield that improved by a quadratic way until the level of 0,506%. The daily gain increased in a linear way until the level of 0,512% of digestible methionine and cystine. The digestible methionine and cystine intake increased in a linear way with the increase digestible methionine and cystine levels in the diet. It was not observed effect of the treatments on feed intake, backfat depth, carcass yield and percentage lean. It was concluded that requirements of digestible methionine and cystine for castrated barows swine were 0,506% correspondent to digestible methionine and cystine:digestible lysine ration of 63,0% for a better feed:gain and lean yield.