Digestible threonine: lysine ratio in diets for white laying hens at 42 to 58 weeks of age / Relação treonina: lisina digestíveis na dieta de poedeiras leves de 42 a 58 semanas de idade
Pastore, Silvana Marques; Albino, Luiz Fernando Teixeira; Gomes, Paulo Cezar; Oliveira, Will Pereira de; Silva, Eliane Aparecida da; Viana, Gabriel da Silva; Mendes, Melissa Fabíola dos Santos Alves; Alves, Warley Junior; Iglesias, Erick.
R. bras. Saúde Prod. Anim.
; 17(3): 438-447, jul.-set. 2016. tab
Artículo
en Portugués
| VETINDEX | ID: vti-481306
This study was conducted to determine the ideal ratio of digestible threonine lysine in diets for laying hens at 42 to 58 weeks of age. Two hundred forty Hy Line W-36 laying hens were used at 42 weeks of age for 16 weeks. The treatments were distributed in a completely randomized design with eight replicates and six birds each. The experimental diets were formulated with five levels of digestible threonine (0.461; 0.515; 0.569; 0.622 and 0.676%) providing the five ratio of digestible threonine lysine (60; 67; 74; 81 and 88%) studied. The variables analyzed were egg production; feed intake; lysine intake; threonine intake; mass egg; average egg weight; lysine use efficiencies by mass and produced eggs; feed conversion per mass and dozen eggs; Average weights yolk, albumen and shell; weight gain and final body weights of birds; and nitrogen balance. The digestible threonine lysine ratio in the diet did not influence the analyzed variables except consumption of threonine which showed a linear effect. The ideal ratio of digestible threonine lysine in diets for white laying hens at 42 to 58 weeks of age is 60%, which corresponds to the level of 0.461% of digestible threonine in the diet and daily intake of digestible threonine 446mg/bird.(AU)
Biblioteca responsable:
BR68.1
Ubicación: BR68.1
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