Bijeenkomst: EGF2015
Auteur: Jiménez-Calderón J.D., Santiago C., Martínez-Fernández A. and Vicente F.
ISBN: 978-9090-289-61-8
Jaar van uitgifte: 2015
Producttype: Paper
Nowadays, a wide range of dairy farms coexist: from family farms to large-scale dairy farms. In order to determine the feeding systems of the dairy farms in Asturias (Spain), a sample of close to 2% of the total number of dairy farms (2,446) was randomly selected and surveyed. Farms were stratified according to their milk quota into four groups: 500 Mg year‑1. Milk yields in each group were 6,120, 7,525, 7,997 and 9,537 kg cow‑1 per lactation, respectively (P
silage
Effect of feeding system on cow milk fatty acids composition in a panel of Galician dairy farms
Bijeenkomst: EGF2015
Auteur: Resch-Zafra C., Pereira-Crespo S., Flores-Calvete G., Dagnac T., Gónzalez L., Agruña M.J., Fernández-Lorenzo B. and Veiga M.
ISBN: 978-9090-289-61-8
Jaar van uitgifte: 2015
Producttype: Paper
Sixty farms located in the Galicia region (NW Spain) were sampled four times during 2012 and samples of ration ingredients and bulk-tank milk were taken with the objective of studying the relationships between dairy cow ration and the fatty acid (FA) composition of the milk. Diets were grouped into five clusters based on ration ingredients and significant differences among clusters were observed for saturated, polyunsaturated, omega-3 and conjugated linoleic fatty acids, as well as for the omega6- omega3 ratio. In general, milk from grazing extensive systems and from intensive systems based on silage and concentrates supplemented with extruded linseed showed the highest contents of human-health FA. The ability of FA-based discriminant functions for assigning farm tank milk samples to a particular diet was deemed as not satisfactory.