In the investigation, 3 groups of 11 dairy cows were included. All animals were fed hay ad libitum, 15 kg fodder beet and concentrate feed. In the first experimental period, the daily ration was supplemented with 1,0 kg ground rapeseed, sunflowerseed or linseed respectively. In the second period, the quantity of sunflowerseed and linseed was increased to 1,5 kg. The aim of the study was to evaluate the effects of oilseed supplementation on feed intake, milk yield and milk quality.Cows fed linseed tended to have lower hay intake. The milk yield and milk protein content were not affected by the different oilseeds. Although not reaching significance, the sunflowerseeds caused a slight reduction in the milk fat content when the daily intake was increased from 1,0 to 1,5 kg. Supplementation of the basic diet with oilseeds led to an improvement of the milk quality from a nutritional and technological point of view. Especially sunflowerseed not only increased the ratio of the sum of C18:1 to palmitic acid (C16:0) well above the limit of 0,8 and therefore improved the quality of the model-cheeses, but also increased the concentration of monounsaturated and polyunsaturated fatty acids. The highest content in ω3 FA in milk fat was, however, obtained with linseed supplementation. In addition we have shown that the changes in milk fat composition are highly dependent of the total fat intake and the composition of the fatty acids in the diet.
Which stakeholders in the dairy sector have an influence on the productive life of dairy cows? Research results from FiBL and Agroscope suggest that broad-based cooperation is needed to create structures for a longer productive life.
Agriculture is aiming to reduce greenhouse gas and ammonia emissions. Agroscope showed that for dairy cattle housing, feed composition plays a role in these emissions as well as wind and temperature.
Lazzari G., Münger A., Eggerschwiler L., Borda-Molina D., Seifert J., Camarinha-Silva A., Schrade S., Zähner M., Zeyer K., Kreuzer M., Dohme-Meier F.
Tannin-containing feedstuffs like Acacia mearnsii and sainfoin (Onobrychis viciifolia) have a measurable impact in reducing methane emissions from dairy cows. However, since these feedstuffs in some cases lead to productivity losses, careful consideration must be given to their use.