13978 1 archive 9645 disk0/00/01/39/78 2009-04-16 2009-08-20 14:40:08 2009-08-20 14:40:08 conference_item show 0 de Dieser Beitrag ist im Tagungsband der 10. Wissenschaftagung erschienen: Mayer, J.; Alföldi, T.; Leiber, F.; Dubois, D.; Fried, P.; Heckendorn, F.; Hillmann, E.; Klocke, P.; Lüscher, A.; Riedel, S.; Stolze, M.; Strasser, F.; van der Heijden, M. and Willer, H., (Hrsg.) (2009) Werte – Wege – Wirkungen: Biolandbau im Spannungsfeld zwischen Ernährungssicherung, Markt und Klimawandel. Beiträge zur 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009. Band 1: Boden, Pflanzenbau, Agrartechnik, Umwelt- und Naturschutz, Biolandbau international, Wissensmanagement Band 2: Tierhaltung, Agrarpolitik und Betriebswirtschaft, Märkte und Lebensmittel. Verlag Dr. Köster, Berlin. Der Tagungsband kann beim Verlag Dr. Köster bezogen werden; siehe http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37 int_conf_2009_wita_2_tierernaehrung ch-agroscope-alp 11.-13. Februar 2009 10. Wissenschaftstagung Ökologischer Landbau Zürich yes 0 http://www.wissenschaftstagung.de/ http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37 TRUE paper Arrigo Yves Herr Dohme Frigga Frau pub 3feeding Esparsette; Milchkühe; Proteinumsatz; Weide A study was carried out to investigate the potential of condensed tannins (CT) from sainfoin to minimize ruminal ammonia load in dairy cows grazing pasture with a high crude protein content (227 g/kg dry matter [DM]). Eight ruminally fistulated Holstein cows were supplemented with either 4 kg DM of dehydrated-pelleted sainfoin (CT content: 71 g/kg DM) or 4 kg DM of dehydrated-pelleted alfalfa (n = 4). Supplements were divided into two meals fed in the morning and in the afternoon before cows went on pasture. After adaptation to the diet (9 d) milk performance were measured on three consecutive days and ruminal fluid and blood were sampled on two consecutive days at 6:30, 8:00 and 16:30 h. Grass intake on pasture and the proportion of digested protein were estimated using the double n-alkane technique. The supplements were consumed completely. Grass DM intake was similar for treatments (P > 0.05). Ruminal ammonia concentration increased in both treatment groups after the morning feeding (P < 0.001) but was lower (P < 0.05) for cows on sainfoin treatment than for cows on alfalfa treatment. The same trend was observed for plasma urea concentration (P = 0.06). Milk performance did not (P > 0.05) differ between treatments. In conclusion, about 25% of sainfoin in the diet can decrease ruminal ammonia and plasma urea concentrations to a certain extent. However, to achieve a greater decrease sainfoin with a higher CT content has to be fed. 2009 published public 9229 1 13978 1 application/pdf de public

Arrigo_13978.pdf

Arrigo_13978.pdf 47288 http://orgprints.org/13978/1/Arrigo_13978.pdf