Exigência de metionina mais cistina para codornas japonesas em postura
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Revista Brasileira de Zootecnia
Abstract
Foram utilizadas 360 codornas fêmeas, com idade inicial de 45 dias e peso médio de 137,0 g, durante quatro períodos de 28 dias. O delineamento experimental foi em blocos ao acaso, com seis relações metionina mais cistina digestível: lisina digestível (0,60, 0,65, 0,70, 0,75, 0,80 e 0,85) e seis repetições de 10 animais cada. As variáveis estudadas foram: postura (%), peso do ovo (g), massa de ovos (g de ovos/codorna/dia), consumo alimentar (g), conversão alimentar (g de ração/g de ovos e g de ração/dz de ovos), peso final (g) e porcentagem da casca do ovo (%). Os tratamentos experimentais não influenciaram a conversão alimentar e o peso final das codornas, apresentando efeito quadrático sobre a taxa de postura, peso dos ovos, massa dos ovos e porcentagem da casca dos ovos e efeito linear para o consumo alimentar. A exigência em metionina mais cistina digestível foi estimada em 0,727%, para consumo diário de 164 mg de metionina mais cistina digestível, e a melhor relação metionina mais cistina digestível: lisina digestível para as codornas japonesas em postura foi estimada em 0,80.
Three hundred and sixty 45-days old female quails, averaging 137.0 g, were used during four experimental periods of 28 days each. A completely randomized block design, with six replicates and ten females per experimental unit, was used to study the digestible methionine plus cystine requirement and the best digestible methionine plus cystine: digestible lysine ratio (0.60, 0.65, 0.70, 0.75, 0.80 and 0.85), on the rate of eggs production (%), egg weight (g), eggs mass (g of eggs/quail/day), feed intake (g), feed consumption: weight gain ratio (g of diet/g of eggs), body weight (g) and shell percentage (%). No significant effect of treatments on feed consumption: gain diet (g of diet/g of eggs). Quadratic effects were observed for final body weight (g), egg production (%), egg weight (g), egg mass (g of eggs/quail/day) and shell egg (%), and for feed intake (g) the effect was linear. The estimated digestible methionine plus cystine requirement was .727%, for a daily intake of 164 mg of digestible methionine plus cystine, and the best estimated digestible methionine plus cystine: digestible lysine ratio for laying Japanese quails was .80.
Three hundred and sixty 45-days old female quails, averaging 137.0 g, were used during four experimental periods of 28 days each. A completely randomized block design, with six replicates and ten females per experimental unit, was used to study the digestible methionine plus cystine requirement and the best digestible methionine plus cystine: digestible lysine ratio (0.60, 0.65, 0.70, 0.75, 0.80 and 0.85), on the rate of eggs production (%), egg weight (g), eggs mass (g of eggs/quail/day), feed intake (g), feed consumption: weight gain ratio (g of diet/g of eggs), body weight (g) and shell percentage (%). No significant effect of treatments on feed consumption: gain diet (g of diet/g of eggs). Quadratic effects were observed for final body weight (g), egg production (%), egg weight (g), egg mass (g of eggs/quail/day) and shell egg (%), and for feed intake (g) the effect was linear. The estimated digestible methionine plus cystine requirement was .727%, for a daily intake of 164 mg of digestible methionine plus cystine, and the best estimated digestible methionine plus cystine: digestible lysine ratio for laying Japanese quails was .80.