Níveis de metionina + cistina para frangos de corte de 1 a 21 e 22 a 42 dias de idade Methionine + cystine levels for broilers from 1 to 21 and from 22 to 42 days of age

Autor: Luiz Fernando Teixeira Albino, Shirley Helena Mendes da Silva, José Geraldo Vargas Junior, Horacio Santiago Rostagno, Martinho de Almeida e Silva
Jazyk: English<br />Spanish; Castilian<br />Portuguese
Rok vydání: 1999
Předmět:
Zdroj: Revista Brasileira de Zootecnia, Vol 28, Iss 3, Pp 519-525 (1999)
Druh dokumentu: article
ISSN: 1516-3598
1806-9290
DOI: 10.1590/S1516-35981999000300012
Popis: Este experimento foi realizado para determinar a exigência nutricional em metionina + cistina (aminoácidos sulfurosos) para frangos de corte Hubbard e Ross de ambos os sexos, no período de 1 a 21 e 22 a 42 dias de idade. Ganho de peso, consumo, conversão alimentar e composição de carcaça das aves foram avaliados. Foram usadas 2400 aves na fase de 1 a 21 dias de idade e 1800 na fase de 22 a 42 dias de idade. Rações basais com 21e 19% PB e 3000 e 3100 kcal EM/kg foram suplementadas com seis níveis de metionina + cistina ( 0; 0,06; 0,12; 0,18; 0,24; e 0,30) nas fases de 1 a 21 e 22 a 42 dias de idade, respectivamente. As estimativas das exigências de metionina + cistina para a fase de 1 a 21 dias foram 0,886 e 0,896% e 0,890 e 0,868% e para a fase de 22 a 42 dias, 0,795 e 0,802% e 0,810 e 0,792%, para machos e fêmeas Hubbard e Ross, respectivamente.This experiment was carried out to determine the nutritional requirement of methionine + cystine (sulfur amino acids) for Hubbard and Ross broilers from 1 to 21 and from 22 to 42 days of age, of both sexes. Weight gain, intake, feed:gain and carcass composition were evaluated. Two thousand and four hundred broilers were used in the phase from 1 to 21 of age and 1800 broilers in the phase from 22 a 42 days of age. Basal diets with 21 and 19% of the CP and 3000 and 3100 kcal ME/kg were supplemented with six levels of methionine + cystine in the phases from 1 to 21 and from 22 to 42 of age, respectively. The estimated requirements of methionine + cystine ( 0; .06; .12; .18; .24; and .30) for the phase from 1 to 21 days were. 886% and .896%, .890% and .868% and for the phase from 22 to 42 days, .795%, and .802%, .810% and .792% for Hubbard and Ross male and female, respectively.
Databáze: Directory of Open Access Journals
Externí odkaz: