Artículo
Effects of high fiber energy supplements on production performance, milk composition and milk fatty acid profile from dairy ewes fed fresh cut Lolium multiflorum
Miccoli, Florencia Estefania; Pérez, Carolina Daiana
; Vargas Bello Pérez, Einar; Danelón, José L.; Cantet, Juan Manuel
; Martínez, Rocío; Bargo, Fernando; Colombatto, Dario
; Palladino, Rafael Alejandro
Fecha de publicación:
04/2022
Editorial:
Elsevier Science
Revista:
Journal of Small Ruminant Research
ISSN:
0921-4488
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Supplementation of dairy ewes under grazing systems can improve milk production but different responses can be obtained when using starch or high degradable fiber as energy sources. The aim of this study was to evaluate the effect of two contrasting sources of dietary energy on animal production, milk composition and fatty acid (FA) profile of dairy ewes fed fresh ryegrass. Ten Pampinta ewes (28 ± 2.3 DIM; 65.8 ± 8.67 kg BW) were assigned to one of two dietary treatments in a complete randomized design with repeated measures: SH (soybean hulls) and CG (corn grain). Daily ration consisted of fresh ryegrass (Lolium multiflorum) plus concentrate in a 50:50 ratio (4% of BW). The experiment lasted 5 weeks, with 3 weeks for data collection. Individual milk samples were analyzed for milk composition and milk FA profile. Data were analyzed in a complete randomized design where supplement was considered a fix effect and ewe the random effect. Dry matter and forage intake were higher in SH (P < 0.05). Milk yield, milk protein and milk fat were similar between treatments. Compared to CG, total polyunsaturated FA (6.77 vs. 4.49 g/100g FA), total n-3 FA (0.89 vs. 0.58 g/100g FA) and total n-6 FA (3.43 vs. 1.94 g/100g FA) were higher in milk from SH (P < 0.05). Results suggest that replacing starch with fibrous supplements in early-lactation dairy ewes constitutes a promising alternative to obtain a more health-promoting FA profile in milk, without compromising milk yield and composition.
Palabras clave:
CARBOHYDRATE SOURCES
,
DAIRY EWES
,
MILK FATTY ACIDS
,
MILK PRODUCTION
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos (ICYTESAS)
Articulos de INSTITUTO DE INVESTIGACION DE LA CADENA LACTEA
Articulos de INSTITUTO DE INVESTIGACION DE LA CADENA LACTEA
Citación
Miccoli, Florencia Estefania; Pérez, Carolina Daiana; Vargas Bello Pérez, Einar; Danelón, José L.; Cantet, Juan Manuel; et al.; Effects of high fiber energy supplements on production performance, milk composition and milk fatty acid profile from dairy ewes fed fresh cut Lolium multiflorum; Elsevier Science; Journal of Small Ruminant Research; 209; 4-2022; 1-8
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