caa a22 4500 388060409 CHVBK 20180307125119.0 cr unu---uuuuu 161130e199808 xx s 000 0 eng 10.1017/S1357729800009784 doi S1357729800009784 pii (NATIONALLICENCE)cambridge-10.1017/S1357729800009784 Effect of undernutrition and refeeding on digestion in Bos taurus and Bos indicus in a tropical environment [Elektronische Daten] The effect of underfeeding and ref eeding on digestion was studied in Bos taurus and Bos indicus cows. Eight nonlactating cows, four B. taurus and four B. indicus (live weight 156 kg and 207 kg respectively) were first given a forage-based diet at a level above energy maintenance requirements for 4 weeks (3·65 and 4·66 kg dry matter (DM) per day respectively for B. taurus and B. indicus). They were then restricted at a low level of intake for 2 months (1·83 and 2·33 kg DM per day respectively for B. taurus and B. indicus) and finally refed at the first level for 2 months. Digestion measurements were made before the underfeeding period, at 3 and 8 weeks of underfeeding and at 3 and 8 weeks ofref eeding. Organic matter apparent digestibility decreased with underfeeding and increased with refeeding (0·637, 0·591, 0·652, 0·692 and 0·669 in B. taurus and 0·674, 0·560, 0·580, 0·698 and 0·692 in B. indicus, respectively 1 week before, 3 and 8 weeks after underfeeding, and 3 and 8 weeks after refeeding). This lower apparent digestibility at low level of intake was not expected either by ruminal particle retention time, which increased when intake decreased, or by measurements ofmicrobial activity: DM degradability measured in situ and ruminal particle size did not vary with level of intake. An effect of the length of underfeeding and refeeding was seen: the apparent digestibility tended to increase after several weeks of undernutrition and was higher after refeeding than before underfeeding. No difference was observed between the two genotypes. Copyright © British Society of Animal Science 1998 cattle nationallicence refeeding nationallicence rumen digestion nationallicence tropical climate nationallicence underfeeding nationallicence zebu nationallicence Grimaud P. Centre International de Recherche-Développement sur l'Elevage en zone Subhumide, 01 BP 454 Bobo-Dioulasso, Burkina Faso Richard D. Centre de Coopération Internationale en Recherche Agronomique pour le Développement/Département Elevage et Médecine Vétérinaire en pays Tropicaux, BP 5035, 34032 Montpellier, France Kanwé A. Centre International de Recherche-Développement sur l'Elevage en zone Subhumide, 01 BP 454 Bobo-Dioulasso, Burkina Faso Durier C. Institut National de la Recherche Agronomique, Laboratoire de Biométrie, Route de St Cyr, 78026 Versailles, France Doreau M. Institut National de la Recherche Agronomique, Laboratoire Sous-Nutrition des Ruminants, Theix 63122 St Genès Champanelle, France Animal Science Cambridge University Press 67/1(1998-08), 49-58 1357-7298 67:1<49 1998 67 ASC https://doi.org/10.1017/S1357729800009784 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1357729800009784 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grimaud P. Centre International de Recherche-Développement sur l'Elevage en zone Subhumide, 01 BP 454 Bobo-Dioulasso, Burkina Faso NATIONALLICENCE 700 1- Richard D. Centre de Coopération Internationale en Recherche Agronomique pour le Développement/Département Elevage et Médecine Vétérinaire en pays Tropicaux, BP 5035, 34032 Montpellier, France NATIONALLICENCE 700 1- Kanwé A. Centre International de Recherche-Développement sur l'Elevage en zone Subhumide, 01 BP 454 Bobo-Dioulasso, Burkina Faso NATIONALLICENCE 700 1- Durier C. Institut National de la Recherche Agronomique, Laboratoire de Biométrie, Route de St Cyr, 78026 Versailles, France NATIONALLICENCE 700 1- Doreau M. Institut National de la Recherche Agronomique, Laboratoire Sous-Nutrition des Ruminants, Theix 63122 St Genès Champanelle, France NATIONALLICENCE 773 0- Animal Science Cambridge University Press 67/1(1998-08), 49-58 1357-7298 67:1<49 1998 67 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge