Energy and amino acid content in phase 1 nursery diet: piglet performance and body chemical composition
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Data
2010-06-01
Autores
Trindade Neto, Messias Alves da
Berto, Dirlei Antonio [UNESP]
Nyachoti, Charles Martin
Schammass, Eliana Aparecida
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zootecnia
Resumo
Avaliaram-se os efeitos da densidade de energia metabolizável (EM) e lisina digestível (LIS) sobre o desempenho e a composição corporal de leitões após o desmame. Utilizaram-se 114 animais desmamados aos 7,4 ± 0,80 kg; desses animais, 108 foram alojados na unidade de creche e 6 foram abatidos no dia do desmame para determinação dos dados comparativos da composição química corporal. Seis densidades de nutrientes foram estipuladas a partir de estudo anterior, com base na maior retenção de nitrogênio, mantendo-se as seguintes relações EM:LIS nas dietas experimentais: 3.390:1,291; 3.450:1,409; 3.650:1,411; 3.780:1,461; 3.940:1,507; e 4.109 kcal/kg EM:1,564% LIS. As dietas experimentais foram oferecidas durante 13 dias, quando os leitões atingiram o peso de 12,986 ± 1,449 kg. Avaliaram-se os prováveis efeitos residuais da densidade nutricional no desempenho subseqüente dos leitões. Ao término da fase inicial-1, seis leitões de cada densidade foram abatidos para determinação da composição química nas frações corporais e no corpo vazio. Não houve influência significativa dos níveis nutricionais no desempenho dos leitões ao término da avaliação. Os resultados de conversão alimentar e composição corporal ratificam o nível indicado em estudo anterior, de 4 g LIS/Mcal. O aumento da densidade de energia e lisina confirma a necessidade da correta relação entre ambos para assegurar o melhor desempenho dos leitões na fase inicial de crescimento.
It was evaluated the effects of metabolizable energy (ME) and digestible lysine (dLYS) densities on performance and body composition of weaned piglets. The study used 114 piglets weaned at 7.4 ± 0.80 kg, out of which 108 were allotted in the nursery and 6 were slaughtered on the weaning day to determine comparative data of body chemical composition. Six nutrients densities were stipulated from a previous study based on the highest nitrogen retention, maintaining the following ME:LYS relationship in the experimental diets: 3,390:1.291; 3,450:1.409; 3,650:1.411; 3,780:1.461; 3,940:1.507; and 4,109 kcal/kg ME:1.564% dLYS. The experimental diets were offered for 13 days when the piglets reached 12.986 ± 1.449 kg of body weight. The probable residual effects of nutritional density on the subsequent performance of the piglets were evaluated. At the end of initial phase 1, six piglets from each density were slaughtered to determine their chemical composition in body fractions and empty body. There was no significant influence of nutritional levels on the performance of the piglets at the end of the evaluation. The results of food conversion and body composition confirm the level indicated in the previous study, 4 g dLYS/Mcal of ME. The increase of energy and lysine densities confirms the need for a correct relationship among both of them to assure better performance of the piglets at the beginning of the growing phase.
It was evaluated the effects of metabolizable energy (ME) and digestible lysine (dLYS) densities on performance and body composition of weaned piglets. The study used 114 piglets weaned at 7.4 ± 0.80 kg, out of which 108 were allotted in the nursery and 6 were slaughtered on the weaning day to determine comparative data of body chemical composition. Six nutrients densities were stipulated from a previous study based on the highest nitrogen retention, maintaining the following ME:LYS relationship in the experimental diets: 3,390:1.291; 3,450:1.409; 3,650:1.411; 3,780:1.461; 3,940:1.507; and 4,109 kcal/kg ME:1.564% dLYS. The experimental diets were offered for 13 days when the piglets reached 12.986 ± 1.449 kg of body weight. The probable residual effects of nutritional density on the subsequent performance of the piglets were evaluated. At the end of initial phase 1, six piglets from each density were slaughtered to determine their chemical composition in body fractions and empty body. There was no significant influence of nutritional levels on the performance of the piglets at the end of the evaluation. The results of food conversion and body composition confirm the level indicated in the previous study, 4 g dLYS/Mcal of ME. The increase of energy and lysine densities confirms the need for a correct relationship among both of them to assure better performance of the piglets at the beginning of the growing phase.
Descrição
Palavras-chave
aminoácido digestível, desempenho, desmamados, suíno, digestible amino acid, performance, swine, weaned
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 39, n. 6, p. 1286-1294, 2010.