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Feeding strategies to obtain high quality milk in intensive dairy sheep production systems

Otros títulosStrategies alimentaires pour l'obtention du lait de haute qualité dans des systèmes d 'élevage intensifs chez les ovins laitiers
AutorFrutos, Pilar ; Toral, Pablo G. ; Lavín, Paz ; Hervás, Gonzalo ; Mantecón, Ángel R.
Palabras claveEwe
Fatty acid
Lipid supplement
Production System
Acide gras
Supplément lipidique
Système de production
Fecha de publicaciónjun-2015
EditorCentre international de hautes études agronomiques méditerranéennes
Centre international de recherche en agronomie pour le développement
CitaciónFAO-CIHEAM Network on Sheep and Goats. Joint Seminar of the Sub-Network on Production Systems and Sub-Network on Nutrition : 109 (2015)
ResumenCastile and Leon is the main producing region of ovine milk in Spain, with more than 60% of national milk production and more than 40% of sheep census. Current systems of dairy sheep production in this area are characterized by an important increase in milk yield in the last decade (55%) and a lower number of farms. These changes result from larger flock size, use of specialized breeds, intensification, and a high individual production (over 300 L/ewe on average), which rely on feeding systems including no grazing and low forage:concentrate ratios. Under this situation, the nutritional value of the milk fat, in terms of impact on consumers’ health, can be detrimentally affected. It is known that moving away from pasture-based diets increases undesirable saturated and decreases potentially health-promoting (e.g., 18:3n-3, CLA, or trans-11 18:1) fatty acid (FA) levels. On the other hand, it provides an incomparable scenario to develop nutritional strategies to enhance milk quality. Dairy ewe diet supplementation with vegetable or marine lipids enables modulation of milk FA composition towards a healthier profile. However, the latter strategy causes milk fat depression, which prevents its application under practical farm conditions. Other compounds, such as tannins, may also modulate milk FA composition. From a research point of view, it is expected that new disciplines (e.g., nutrigenomics), may provide new insights into the mechanisms underlying the nutritional regulation of mammary lipogenesis and enable us to modify, naturally and effectively, the plasticity of ovine milk fat without impairing animal performance.
Descripción1 página.-- Ponencia invitada al FAO-CIHEAM Network on Sheep and Goats. Joint Seminar of the Sub-Network on Production Systems and Sub-Network on Nutrition: The value chain in Mediterranean sheep and goats. Industry organisation, marketing strategies, feeding and production systems, p. 109 (S4-I1). 16-18 de junio de 2015. Montpellier (Francia). Más detalles: http://www.iamz.ciheam.org/montpellier2015/Programme.html
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