Nutritional requirement of digestible lysine for white-egg laying hens in production

Ciência Rural

Pastore, Silvana Marques¹  Oliveira, Will Pereira de³  Viana, Gabriel da Silva¹  Silva, Eliane Aparecida da¹  Almeida, Rodrigo Lopes de¹  Barbosa, Leonardo Valentino Soares²  Barreto, Sérgio Luiz Toledo⁴  Gomes, Paulo Cezar⁴ 

[1] Universidade Federal de Viçosa, Viçosa, BR;Universidade Federal Minas Gerais, Belo Horizonte, BR;Instituto Federal Fluminense, Bom Jesus do Itabapoana, BR;UFV, Viçosa, BR

关键词: amino acid;    eggs quality;    ideal protein;    performance;    poultry;   

DOI  :  10.1590/0103-8478cr20140661

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

The objective of this research was to determine the nutritional requirement of digestible lysine for white laying hens in old age. Two hundred eighty-eight Hy Line W-36 laying hens at 60 weeks of age were distributed in a completely randomized design, with six levels of digestible lysine (6.0; 6.6; 7.2; 7.8; 8.4 and 9.0g kg-1) and eight replications with six birds per experimental unit. There was linear effect of lysine levels on lysine intake and efficiency of utilization of lysine. For the production and egg mass, the levels of digestible lysine in the diet from which the plateaus occurred were of 6.57g kg-1 and 7.10g kg-1, respectively. There was quadratic effect of lysine levels on yolk weight, with the estimated level of 7.6g kg-1 of digestible lysine. The digestible lysine requirement of white laying hens from 60 to 76 weeks of age is 7.10g kg-1 in diet, corresponding to daily intake of 690mg bird-1 of digestible lysine.

【 授权许可】

Unknown