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- Title
Standardized ileal amino acid digestibility of feedstuffs in broiler chickens.
- Authors
Iyayi, E. A.; Adeola, O.
- Abstract
Standardized ileal amino acid digestibility (SIAAD) values of corn, sorghum, full-fat soybean (FFS), peanut flour (PNF), fishmeal (FM) and wheat bran (WB) in 26-d-old broiler chickens were investigated. Three hundred and eightyfour 21-d-old Ross 708 broiler chicks were weighed and assigned to 7 diets: a nitrogen-free diet (NFD) and 6 semi purified diets in which all the protein were supplied by corn, sorghum, FFS, PNF, FM or WB. Each diet was fed to 6 replicates of 8 birds and 5 g/kg diet of chromic oxide added as an indigestible marker. The apparent ileal amino acid digestibility (AIAAD) values in broiler chickens for corn, sorghum, FFS, FM and PNF were greater than values for WB. For the 6 feedstuffs evaluated, the NFD method resulted in greater SIAAD values for all the amino acids. The respective SIAAD values for methionine, lysine, tryptophan, threonine, valine and isoleucine in the feedstuffs were as follows: corn (82.2, 79.6, 87, 74.5, 83.3 and 85.5), sorghum (84.3, 75.9, 81.2, 74.9, 80.7 and 84.2), FFS (77.1, 80.6, 76.5, 69.8, 73.3 and 76.1), FM (87.3, 88.6, 89.9, 83.4, 83.8 and 85.1), PNF (79.5, 61, 83.2, 73.6, 82.6 and 82.9) and WB (53.9, 45.8, 76.3, 53.8, 47 and 54). The SIAAD values for the amino acids were greater in corn, sorghum, FFS, FM and PNF than in WB except for cysteine and tryptophan which had similar values in the feedstuffs. The SIAAD values for lysine and glycine in PNF (61.0 and 56.2) were lower than in corn (76.6 and 76.5), sorghum (75.9 and 73.8), FFS (80.6 and 70.4) and FM (88.6 and 78.3) while values for most of the amino acids in corn, sorghum, FFS and FM were similar. Results of the study showed that the SIAAD values of most of the amino acids in WB were lower compared to the rest feedstuffs possibly due to the non-starch polysaccharide content and the relatively lower protein content of WB.
- Subjects
AMINO acid biotechnology; SORGHUM; SOYBEAN; BROILER chickens; POULTRY hatcheries
- Publication
European Poultry Science / Archiv für Geflügelkunde, 2014, Vol 78, p1
- ISSN
0003-9098
- Publication type
Article
- DOI
10.1399/eps.2014.54