Fecha/hora: 15/06/2024 21:16:47

Biblioteca(s): 	INIA La Estanzuela.	
Fecha corriente: 	03/08/2021	
Fecha de la última actualización: 	03/08/2021	
Autoria: 	MARTÍNEZ, R.; PALLADINO, D.A.; BANCHERO, G.; FERNÁNDEZ-MARTIN, R.; NANNI, M.; JULIANO, N.; LORIO, J.; LA MANNA, A.	
Afiliación: 	ROCÍO MARTÍNEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DANIEL ALEJANDRO PALLADINO, Instituto de Producción Animal (INPA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina C1417DSE; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RAFAEL FERNÁNDEZ-MARTIN, Instituto de Producción Animal (INPA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina C1417DSE.; MARIANA NANNI, Instituto de Investigación Tecnología de los Alimentos?Instituto Nacional de Tecnología Agropecuaria, Buenos Aires, Argentina B1686.; NICOLÁS JULIANO, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina C1417DSE.; JESICA LORIO, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina C1417DSE.; ALEJANDRO FRANCISCO LA MANNA ALONSO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Providing heat-stress abatement to late-lactation Holstein cows affects hormones, metabolite blood profiles, and hepatic gene expression but not productive responses.	
Año de publicación: 	2021	
Fuente/Imprenta: 	Applied Animal Science Volume 37, Issue 4, August 2021, Pages 490-503. OPEN ACCESS. Doi: https://doi.org/10.15232/aas.2020-02109	
DOI: 	10.15232/aas.2020-02109	
Idioma: 	Inglés	
Notas: 	Article history: Received 7 October 2020, Accepted 7 June 2021, Available online 28 July 2021. Corresponding author: rmartine@agro.uba.ar.
This article is available under the Creative Commons CC-BY-NC-ND license and permits non-commercial use of the work as published, without adaptation or alteration provided the work is fully attributed.	
Contenido: 	ABSTRACT: Objective: Our objective was to evaluate the effects of providing shade and shade combined with evaporative cooling on production, cow activity, metabolism, and hepatic gene expression of late-lactation Holstein dairy cows under moderate heat-stress conditions. Materials and Methods: Forty-eight multiparous Holstein cows were used in a completely randomized blockdesign trial and randomly assigned to 1 of 3 treatments: control (CTL), without access to shade; access to artificial shade (SH); and shade combined with evaporative cooling (SHplus). Results were analyzed using a mixed procedure 
with repeated measures. Results and Discussion: No differences were observed in DMI. Milk yield was not different among treatments, but lactose concentration was greater in SHplus. Treatments CTL and SH had greater BW losses than SHplus. Control cows spent less time grazing. The CTL and SH had higher p.m. rectal temperatures than SHplus, whereas CTL had the highest p.m. respiration rate. Control cows had greater serum insulin levels. Control and SH had 
greater BHB and urea concentrations and lower glucose concentration compared with SHplus. The hepatic expression of PCK1, PDK4, and HP genes was downregulated in SH and SHplus relative to control. Hepatic expression of NFKB1 was downregulated, whereas SOCS2 was upregulated, for SHplus compared with CTL.Implications and Applications: Despite the absence of treatment effects on productive variables, changes in blood profiles and hepatic expression of target genes were observed among treatments. These results suggest that the provision of shade combined with evaporative cooling was effective in alleviating the negative effects of heat stress.	
Palabras-Clave: 	Energy metabolismhepatic; Gene expression; Heat stress; Late lactation.	
Thesagro: 	LECHERÍA.	
Categoría del tema: 	--	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/15914/1/Applied-Animal-Science-37p.490503-Martinez.pdf	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (103421-1) - PXI - AP - DD - PP/AAS/37/2021 -  -  - DIS