Using compositional mixed-effects models to evaluate responses to amino acid supplementation in milk replacers for calves
Visualitza/Obre
Data de publicació
2021-04-15ISSN
0022-0302
Resum
The consequences of supplementing Lys, Met, and Thr in milk replacers (MR) for calves have been widely studied, but scarce information exists about potential roles of other AA (whether essential or not). The effects on growth performance of supplementation of 4 different AA combinations in a mixed ration (25.4% crude protein and 20.3% fat) based on skim milk powder and whey protein concentrate were evaluated in 76 Holstein male calves (3 ± 1.7 d old). The 4 MR were as follows: CTRL with no AA supplementation; PG, supplying additional 0.3% Pro and 0.1% Gly; FY, supplying additional 0.2% Phe and 0.2% Tyr; and KMT, providing additional 0.62% Lys, 0.22% Met, and 0.61% Thr. All calves were fed the same milk allowance program and were weaned at 56 d of study. Concentrate intake was limited to minimize interference of potential differences in solid feed intake among treatments. Animals were weighed weekly, intakes recorded daily, and blood samples obtained at 2, 5, and 7 wk of study to determine serum urea and plasma AA concentrations. Plasma AA concentrations were explored using compositional data analysis, and their isometric log-ratio transformations were used to analyze their potential influence on ADG and serum urea concentration using a linear mixed-effects model. We detected no differences in calf performance and feed intake. Plasma relative concentration of the AA supplemented in the KMT and PG treatments increased in their respective treatments, and, in PG calves, a slight increase in the proportion of plasma Gly, Glu, and branched-chain AA was also observed. The proportions of plasma branched-chain AA, His, and Gln increased, and those of Thr, Arg, Lys, and Glu decreased with calves' age. A specific log-contrast balance formed by Arg, Thr, and Lys was found to be the main driver for lowering serum urea concentrations and increasing calf growth. The use of compositional mixed-effects models identified a cluster formed by the combination of Arg, Thr, and Lys, as a potential AA to optimize calf growth.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
English
Matèries (CDU)
636 - Explotació i cria d'animals. Cria del bestiar i d'animals domèstics
Pàgines
12
Publicat per
Elsevier
Publicat a
Journal of Dairy Science
Citació
Terré, M., I. Ortuzar, J. Graffelman, A. Bassols, M. Vidal, and A. Bach. 2021. "Using Compositional Mixed-Effects Models To Evaluate Responses To Amino Acid Supplementation In Milk Replacers For Calves". Journal Of Dairy Science 104 (7): 7808-7819. doi:10.3168/jds.2020-20035.
Número de l'acord de la subvenció
MINECO/Programa Estatal de fomento de la investigación científica y técnica de excelencia/AGL2015-68463-C2-1-P/ES/DETERMINACION DE LOS AMINOACIDOS LIMITANTES PARA EL CRECIMIENTO DE LOS TERNEROS AMAMANTADOS Y SU FUNCIONALIDAD/
MINECO/Programa Estatal de fomento de la investigación científica y técnica de excelencia/AGL2015-68463-C2-2-P/ES/ESTUDIO MOLECULAR DE LOS EFECTOS DE LA SUPLEMENTACION DE AMINOACIDOS EN TERNEROS AMAMANTADOS MEDIANTE UNA APROXIMACION BIOQUIMICA Y PROTEOMICA/
MICIU-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTI2018-095518-B-C22/ES/TRANSFERENCIA Y DESARROLLO METODOLOGICO DE TECNICAS COMPOSICIONALES PARA LAS CIENCIAS APLICADAS Y LA INGENIERIA/
Programa
Producció de Remugants
Documents relacionats
Dades de recerca
Enllaç al document relacionat
Aquest element apareix en la col·lecció o col·leccions següent(s)
- ARTICLES CIENTÍFICS [2831]
Excepte que s'indiqui una altra cosa, la llicència de l'ítem es descriu com http://creativecommons.org/licenses/by-nc-nd/4.0/