出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：O objetivo deste estudo foi avaliar os efeitos de diferentes proporções de triptofano e lisina digestível para codornas japonesas em crescimento (1 a 40 dias de idade) com repercussões no estágio inicial de produção (41 a 110 dias de idade). Foram distribuídas aleatoriamente 1000 codornas japonesas com um dia de idade, em cinco proporções de triptofano e lisina digestível, 10 repetições e 20 aves por unidade experimental. Uma dieta basal deficiente em triptofano foi formulada com 1,48 g de triptofano digerível/kg, correspondendo a uma proporção de triptofano e lisina de 0,14. Essa dieta basal foi suplementada com cinco níveis de L-triptofano (98%), substituindo o ácido glutâmico correspondente à proporção de triptofano e lisina de 0,14 (sem suplementação); proporções de 0,16; 0,18; 0,20 e 0,22, sendo as dietas isocalóricas e isonitrógenas. Foi avaliado o desempenho das aves nas fases de crescimento e postura. Embora o peso corporal e o ganho de peso até os 40 dias de idade tenham aumentado (P <0,001) e o consumo de ração na fase de postura tenha diminuído (P = 0,037) de maneira linear, a PRL foi a que apresentou o melhor ajuste para esses parâmetros. O efeito foi quadrático para consumo de ração (P = 0,0069), conversão alimentar (P = 0,0032) e viabilidade (P <0,001) das aves na fase de crescimento. Um efeito quadrático foi encontrado para a produção de ovos por ave alojada em um dia de idade (P <0,001), ganho de peso aos 110 dias de idade (P = 0,039) e conversão alimentar por massa de ovo (P = 0,046) na fase de postura. A ingestão de triptofano aumentou (P <0,001) e a produção de ovos por ave alojada na fase de postura diminuiu linearmente (P <0,001) com o aumento das proporções entre triptofano e lisina. A proporção de triptofano digestivo e lisina digestível é de 0,18 (1,88 g de triptofano / kg e 10,5 g de lisina / kg de dieta), correspondendo a uma ingestão de 20,63 mg de triptofano por ave por dia, na dieta para crescimento, proporcionando maior viabilidade de aves na fase de crescimento e desempenho satisfatório de codornas japonesas na fase de postura.↓The objective of this study was to evaluate the effects of different tryptophan and digestible lysine ratios for growing Japanese quails (1 to 40 days of age) with repercussions on the early stage of production (41 to 110 days of age). A total of 1000 one day old Japanese quails were distributed at random, with five tryptophan and digestible lysine ratios, 10 replicates and 20 birds per experimental unit. A tryptophan- deficient basal diet was formulated with 1.48 g of digestible tryptophan /kg, corresponding to a ratio of tryptophan and lysine of 0.14. This basal diet was supplemented with five levels of L-tryptophan (98%), replacing glutamic acid corresponding to the tryptophan and lysine ratio of 0.14 (no supplementation); ratios of 0.16; 0.18; 0.20 and 0.22, being the diets isocaloric and isonitrogenous. The performance of the birds in the growing and egg laying phases was evaluated. Although body weight and weight gain until 40 days of age had increased (P<0,001) and feed intake in the egg laying phase had decreased (P=0,037) in a linear fashion, LRP was the one with the best adjustment for those parameters. The effect was quadratic for feed intake (P=0,0069), feed conversion (P=0,0032) and viability (P<0,001) of the birds in the growing phase. A quadratic effect was found for egg production per bird housed at one day of age (P<0,001), weight gain at 110 days of age (P=0,039) and feed conversion per egg mass (P=0,046) in the laying phase. Intake of tryptophan increased (P<0,001) and egg production per housed bird in the laying phase linearly decreased (P<0,001) with the increase in the ratios between tryptophan and lysine. The digestible tryptophan and digestible lysine ratio is 0.18 (1.88 g of tryptophan/kg and 10.5 g of lysine/kg of diet), corresponding to an intake of 20.63 mg of tryptophan per bird per day, in the diet for growing, provides greater viability of birds in the growing phase and a satisfactory performance of Japanese quails in the laying phase.
其他摘要：The objective of this study was to evaluate the effects of different tryptophan and digestible lysine ratios for growing Japanese quails (1 to 40 days of age) with repercussions on the early stage of production (41 to 110 days of age). A total of 1000 one day old Japanese quails were distributed at random, with five tryptophan and digestible lysine ratios, 10 replicates and 20 birds per experimental unit. A tryptophan- deficient basal diet was formulated with 1.48 g of digestible tryptophan /kg, corresponding to a ratio of tryptophan and lysine of 0.14. This basal diet was supplemented with five levels of L-tryptophan (98%), replacing glutamic acid corresponding to the tryptophan and lysine ratio of 0.14 (no supplementation); ratios of 0.16; 0.18; 0.20 and 0.22, being the diets isocaloric and isonitrogenous. The performance of the birds in the growing and egg laying phases was evaluated. Although body weight and weight gain until 40 days of age had increased (P<0,001) and feed intake in the egg laying phase had decreased (P=0,037) in a linear fashion, LRP was the one with the best adjustment for those parameters. The effect was quadratic for feed intake (P=0,0069), feed conversion (P=0,0032) and viability (P<0,001) of the birds in the growing phase. A quadratic effect was found for egg production per bird housed at one day of age (P<0,001), weight gain at 110 days of age (P=0,039) and feed conversion per egg mass (P=0,046) in the laying phase. Intake of tryptophan increased (P<0,001) and egg production per housed bird in the laying phase linearly decreased (P<0,001) with the increase in the ratios between tryptophan and lysine. The digestible tryptophan and digestible lysine ratio is 0.18 (1.88 g of tryptophan/kg and 10.5 g of lysine/kg of diet), corresponding to an intake of 20.63 mg of tryptophan per bird per day, in the diet for growing, provides greater viability of birds in the growing phase and a satisfactory performance of Japanese quails in the laying phase.
关键词：Aminoácidos essenciais;Desempenho;Produção de ovos;Proteína ideal.;Egg production;Essential amino acids;Ideal protein;Performance.
