Progress towards reduced-crude protein diets for broiler chickens and sustainable chicken-meat production

Journal of Animal Science and Biotechnology

Peter V. Chrystal¹  Shemil P. Macelline²  Sonia Yun Liu²  Peter H. Selle³ 

[1] Poultry Research Foundation within The University of Sydney, Camden Campus, 425 Werombi Road, 2570, Camden, NSW, Australia;Baiada Poultry Pty Limited, 2145, Pendle Hill, NSW, Australia;Poultry Research Foundation within The University of Sydney, Camden Campus, 425 Werombi Road, 2570, Camden, NSW, Australia;School of Life and Environmental Sciences, The University of Sydney, 2006, Camperdown, NSW, Australia;Poultry Research Foundation within The University of Sydney, Camden Campus, 425 Werombi Road, 2570, Camden, NSW, Australia;Sydney School of Veterinary Science, The University of Sydney, 2006, Sydney, NSW, Australia;

关键词: Amino acids;    Broiler chickens;    Glucose;    Insulin;    Protein;    Starch;    Threonine;   

DOI  :  10.1186/s40104-021-00550-w

来源: Springer

【 摘 要 】

The prime purpose of this review is to explore the pathways whereby progress towards reduced-crude protein (CP) diets and sustainable chicken-meat production may be best achieved. Reduced-CP broiler diets have the potential to attenuate environmental pollution from nitrogen and ammonia emissions; moreover, they have the capacity to diminish the global chicken-meat industry’s dependence on soybean meal to tangible extents. The variable impacts of reduced-CP broiler diets on apparent amino acid digestibility coefficients are addressed. The more accurate identification of amino acid requirements for broiler chickens offered reduced-CP diets is essential as this would diminish amino acid imbalances and the deamination of surplus amino acids. Deamination of amino acids increases the synthesis and excretion of uric acid for which there is a requirement for glycine, this emphasises the value of so-called “non-essential” amino acids. Starch digestive dynamics and their possible impact of glucose on pancreatic secretions of insulin are discussed, although the functions of insulin in avian species require clarification. Maize is probably a superior feed grain to wheat as the basis of reduced-CP diets; if so, the identification of the underlying reasons for this difference should be instructive. Moderating increases in starch concentrations and condensing dietary starch:protein ratios in reduced-CP diets may prove to be advantageous as expanding ratios appear to be aligned to inferior broiler performance. Threonine is specifically examined because elevated free threonine plasma concentrations in birds offered reduced-CP diets may be indicative of compromised performance. If progress in these directions can be realised, then the prospects of reduced-CP diets contributing to sustainable chicken-meat production are promising.

【 授权许可】

CC BY