The addition of fatty feed components to a dairy cow ration can influence ruminal fermentation, and hence methane formation in the rumen. In a study with 33 Holstein / Red Holstein dairy cows, the influence of two different types of oilseeds (extruded linseed and ground rapeseed) versus a control (rumen-stable fat) was investigated over a period of 12 weeks in terms of its impact on feed intake, milk yield, ruminal fermentation and methane emission. The feed intake and milk production of the individual animals was recorded daily. In addition, the milk constituents from an evening and morning milking of each animal were analysed on a weekly basis. Individual weekly methane release data were collected at two GreenFeed stations. In weeks 6, 9, 12 and 15 of the trial, ruminal fluid was sampled from 18 cows (six per treatment) using an esophageal probe and analysed for volatile fatty acids, ammonia, and selected microorganisms. Cows that were fed the extruded linseed consumed less feed and their milk had a lower fat content, although they produced more milk per day. Both types of oilseeds led to a 7% reduction in daily methane production in dairy cows, which was accompanied by a reduction in the relative incidence of methanogens in the rumen. Methane intensity (g/kg of energy corrected milk) was numerically reduced by 15 – 17% with both types of oilseeds. We conclude from the present study that a certain reduction in methane emissions can be achieved with oilseeds, but that the amount of reduction varies in terms of intensity according to the calculation basis used.
Although milk-production oriented (MPO) cow breeds have also become established in the mountain region, farms with the dual-purpose ‘Original Simmental’ breed are proving to be economically viable, with lower costs and higher direct payments making up for lower revenues from milk.
High milk yields before drying-off increase the risk of udder infections during the dry period. An online survey highlights what drying-off methods are currently used and how farmers rate the ‘incomplete milking’ approach for reducing milk yield.
Herholz C., Siegwart J., Bruckmaier R.M., Rytz E., Lamon I., Muhr M. und Stirnimann R.
In both sport and alternative agriculture, horses are once again being used as draught animals. Efficient power transmission plays an important role in the wellbeing of draught horses.