Digestible threonine:lysine ratios for light laying hens from 29 to 45 weeks

  title={Digestible threonine:lysine ratios for light laying hens from 29 to 45 weeks},
  author={Leticia Mariano Barbosa and Paulo Ricardo de S{\'a} da Costa Leite and Lu{\'i}s Gustavo Lopes Silva and Paulo Vitor Divino Xavier de Freitas and M{\^o}nica Maria de Almeida Brainer and Karla Priscila Modesto},
The objective was to determine the nutritional requirement of digestible threonine and the threonine: lysine ratios for light laying hens from 29 to 45 weeks of age. Two hundred Hy-Line-36® hens were distributed in a completely randomized design with five replicates and 10 birds per experimental unit and four treatments (5.50, 5.77, 6.05 and 6.30 g digestible threonine kg-1), establishing threonine: lysine of 69, 73, 76 and 80%. Four production cycles of 28 days each were evaluated: feed intake… 

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