Lysine requirements for piglets from 6 to 11kg based on the ideal protein concept - DOI: 10.4025/actascianimsci.v25i1.2130

• Autor(a) principal: Caldara, Fabiana Ribeiro
• Data de Publicação: 2008
• Outros Autores: Berto, Dirlei Antonio, Bisinoto, Kátia Sardinha, Trindade Neto, Messias Alves da, Wechsler, Francisco Stefano
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Animal Sciences (Online)
• Texto Completo: https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2130
• topic: aminoácidos; desempenho; lisina; leitões; uréia plasmática; 5.04.00.00-2 Zootecnia

An experiment was conducted with 96 piglets from 21 to 48 days of age, with the objective of determining lysine requirements of piglets weighing 6 to 11kg, based on the ideal protein concept. The piglets were distributed according to a randomized complete block design, with four treatments, eight replicates and three animals per pen. The rations, containing total lysine levels of 1.30%, 1.40%, 1.50% and 1.60% were fed from 5.84 to 11.02kg; from 11.02 to 19.90kg all animals received the same ration. The same lysine: methionine (100: 26), lysine: threonine (100: 64) and lysine: tryptophan (100: 18) ratios were maintained. No difference (P>0.05) in daily weight gain or feed intake was observed during the first 14 days. A linear improvement was observed in feed conversion and in daily weight gain adjusted for feed intake. The economic efficiency index showed an advantage for the 1.40 and 1.60 % levels of total lysine.