Improving the Reliability of Optimal In-Feed Amino Acid Ratios Based on Individual Amino Acid Efficiency Data from N Balance Studies in Growing Chicken
Open Access
- 26 June 2013
- Vol. 3 (3), 558-573
- https://doi.org/10.3390/ani3030558
Abstract
Three consecutive nitrogen balance experiments with fast-growing male broiler chickens (ROSS 308), both during starter and grower periods, were conducted to determine the ideal ratios of several indispensable amino acids relative to lysine. The control diets based on corn, wheat, fishmeal, field peas, wheat gluten and soybean oil were formulated by computer optimizing to meet the assumed ideal amino acid ratios and to fulfill both the energy and nutrient requirements of growing chicken. According to principles of the diet dilution technique, balanced control diets were diluted by wheat starch and refilled by crystalline amino acids and remaining feed ingredients, except the amino acid under study. The lysine, threonine, tryptophan, arginine, isoleucine and valine diluted diets resulted in significantly lower protein quality as compared to control diet, especially following increased dietary lysine supply (experiments II and III) and stronger amino acid dilution (experiment III). Accordingly, the limiting position of individual amino acids was confirmed, and the derived amino acid efficiency data were utilized to derive ideal amino acid ratios for the starter period: Lys (100): Thr (60): Trp (19): Arg (105): Ile (55): Val (63); and the grower period: Lys (100): Thr (62): Trp (17): Arg (105): Ile (65): Val (79).Keywords
This publication has 39 references indexed in Scilit:
- Lysine requirement studies in modern genotype barrows dependent on age, protein deposition and dietary lysine efficiencyJournal of Animal Physiology and Animal Nutrition, 2009
- Modelling of Protein Metabolism Yields Amino Acid Requirements Dependent on Dietary Amino Acid efficiency, Growth Response, Genotype and Age of Growing ChickenAvian Biology Research, 2008
- Modelling the optimal lysine to threonine ratio in growing chickens depending on age and efficiency of dietary amino acid utilisationBritish Poultry Science, 2008
- Modelling of threonine and methionine requirements of Oreochromis niloticus due to principles of the diet dilution techniqueAquaculture Nutrition, 2007
- Lysine Requirement of Fast Growing Chickens — Effects of Age, Sex, Level of Protein Deposition and Dietary Lysine EfficiencyThe Journal of Poultry Science, 2007
- Ideal amino acid patterns for broiler chicks.Published by CABI Publishing ,2003
- Ideal ratio (relative to lysine) of tryptophan, threonine, isoleucine, and valine for chicks during the second and third weeks posthatchPoultry Science, 2002
- Intestinal Mucosal Amino Acid CatabolismJournal of Nutrition, 1998
- Ideal Amino Acid Profile for Chicks During the First Three Weeks PosthatchingPoultry Science, 1994
- The optimum dietary amino acid pattern for growing pigsBritish Journal of Nutrition, 1989