Facilitating the acceptance of tangibly reduced-crude protein diets for chicken-meat production

作     者：Peter V.Chrystal Shiva Greenhalgh Peter H.Selle Sonia Yun Liu Peter V.Chrystal;Shiva Greenhalgh;Peter H.Selle;Sonia Yun Liu

作者机构：School of Life and Environmental SciencesFaculty of ScienceThe University of SydneySydneyNSE2006Australiali Poultry Research FoundationThe University of SydneyCamdenNSW2570Australia Baiada Poultry Pty Limitedpendle Hill2145NSWAustralia 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2020年第6卷第3期

页      面：247-257页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 

主　　题：Amino acid Dietary energy Digestive dynamic Electrolyte balance Peptide Reduced crude protein 

摘      要：Inclusions of non-bound amino acids particularly methionine,lysine and threonine,together with theideal proteinconcept have allowed nutritionists to formulate broiler diets with reduced crude protein(CP)and increased nutrient density of notionallyessentialamino acids and energy content in recent decades,However,chicken-meat production has been projected to double between now and 2050,providing incentives to reduce dietary soybean meal inclusions further by tangibly reducing dietary CP and utilising a larger array of non-bound amino *** relatively conservative decreases in dietary CP,in the order of 20 to 30 g/kg,do not negatively impact broiler performance,further decreases in CP typically compromise broiler performance with associated increases in carcass lipid *** in carcass lipid deposition suggest changes occur in dietary energy balance,the mechanisms of which are still not fully understood but discourage the acceptance of diets with reductions in CP,Nevertheless,the groundwork has been laid to investigate both amino acid and non-amino acid limitations and propose facilitative strategies for adoption of tangible dietary CP reductions;consequently,these aspects are considered in detail in this ***,investigations into reduced dietary CP are epitomised by variability broiler performance due to the wide range of dietary specifications used and the many variables that should,or could,be considered in formulation of experimental ***,a holistic approach encompassing many factors influencing limitations to the adoption of tangibly reduced CP diets must be considered if they are to be successful in maintaining broiler performance without increasing carcass lipid deposition.