A comparison of organic matter digestibility (OMd) determined in vivo and in vitro was conducted with samples of grass, grass silage, hay, and maize silage (n = 20 per feed) from the Agroscope Posieux collection. The in vitro method was carried out with the Ankom «DaisyII» Incubator (Ankom Technology Corp., Fairport, NY, USA). The coefficients of determination (R2) were 0.660, 0.929 and 0.863 for grass, grass silage and hay, respectively. For maize silage a R2 of OMd of 0.413 was obtained. The overall R2, exclusing the samples before 1990, went from 0.723 to 0.730. Differences between the in vitro and in vivo OMd ranged from –2.5 to –3.0 %-points for hay, grass and maize silage, and stood at +4.0 %-points for grass silage. The tested in vitro method offers good prospects for predicting the organic matter digestibility of fresh and conserved herbage, especiallly for setting up a database for OMd prediction models by near-infrared spectroscopy.
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.