Meta-analysis of the effect of low-protein diets on the growth performance, nitrogen excretion, and fat deposition in broilers

Frontiers in Animal Science

Animal Science

Marie-Pierre Létourneau-Montminy¹  Théophane de Rauglaudre²  Sébastien Fournel³  Bertand Méda⁴  William Lambert⁵  Simon Fontaine⁵ 

[1] Département des Sciences animales, Université Laval, Québec, QC, Canada;Département des Sciences animales, Université Laval, Québec, QC, Canada;Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), Université de Tours, Biologie des Oiseaux et Aviculture (BOA), Nouzilly, France;Département des sols et de génie agroalimentaire, Université Laval, Québec, QC, Canada;Département des sols et de génie agroalimentaire, Université Laval, Québec, QC, Canada;Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), Université de Tours, Biologie des Oiseaux et Aviculture (BOA), Nouzilly, France;METEX Animal Nutrition, Paris, France;

关键词: amino acid;    sustainability;    chicken;    crude protein;    nitrogen balance;    abdominal fat pad;    intake;    efficiency;   

DOI  :  10.3389/fanim.2023.1214076

 received in 2023-04-28, accepted in 2023-06-15,  发布年份 2023

来源: Frontiers

【 摘 要 】

In broilers, the effects of crude protein (CP) reduction on animal performance are heterogeneous. This could limit the use of this strategy in commercial farms despite its potential to improve the sustainability of production. The objective of this meta-analysis was to study the effect of lowering dietary CP in fast-growing broilers with a focus on growth performance. A database was built from 29 papers published after 2016, for a total of 106 trials and 268 treatments. To be included in the database, trials had to be iso-energy and iso-lysine. Trials in which the growth rate for the control treatment was below 90% of the genetic potential of the birds were not included. The effect of the CP level was analyzed by multiple linear regression, with the trial as a random effect. A subsample of 33 trials (AACON) met the recommended amino acid (AA)-to-lysine ratios for indispensable AAs. In this subdatabase, average daily gain and average daily feed intake were maintained when dietary CP was reduced. The feed conversion ratio increased by 1.3% when CP was reduced by a one percentage point. The same CP reduction decreased daily nitrogen (N) excretion by 10.4%, whereas N retention was not affected by CP. In conclusion, respecting the ideal protein concept with the use of feed-grade AA allows for a decrease in dietary CP and N excretion with a limited impact on growth performance.

【 授权许可】

Unknown   
Copyright © 2023 de Rauglaudre, Méda, Fontaine, Lambert, Fournel and Létourneau-Montminy