Commercially available amino acid supplementation of low-protein diets for broiler chickens with different ratios of digestible glycine+serine:lysine

• DOI: 10.3382/ps.2012-02470
• Publication Date: 2012-11-15T15:18:15Z
• Authors: I.C. Ospina-Rojas; A.E. Murakami; C. Eyng; R.V. Nunes; C.R.A. Duarte; M.D. Vargas
• Keywords: Dig; Starter; Litter; Completely randomized design

This work studied the effect of supplementing commercially available amino acids in low-protein diets using different ratios digestible (dig) glycine+serine:lysine (Gly+Ser:Lys) on performance, serum parameters, feathering, and litter characteristics broiler chickens during starter period. A total one thousand fifty 1-d-old Cobb-Vantress male chicks were distributed a completely randomized experimental design into 6 treatments with 5 replicates 35 birds each. The as follows: T1, control diet based corn soybean meal formulated 22% CP (dig Gly+Ser:Lys ratio 147); T2, 2% reduction, supplemented Val 137); T3, similar to T2 addition Gly T4, 3% Val, Ile, Arg 127); T5 T6, T4 137 147, respectively). At 7 21 d, broilers that had received reduction (19% CP) was equivalent 127 lower G:F (P < 0.05) protein albumin concentrations than those feed. However, these parameters restored same level an increase dig from 147. Diets resulted reduced nitrogen content ammonia emission receiving diet. did not influence > feather length or feathering scores at 28 d age. supplementation essential while maintaining above allowed for dietary without undermining early stage broilers.