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Conference paper - Peer-reviewed, 2010

Forage species effects on particle digestion kinetics estimated by rumen evacuation or gas production technique

Bayat, AR; Rinne, M; Ahvenjärvi, S; Huhtanen, Pekka


Digestion rate ( provides digestion kinetic information for different particle sizes of grass and red clover silage diets fed to dairy cows. Dietary treatments and described in a companion summary. Ruminal and faecal particles were divided into large (>1.25 mm; LP), medium (1.25-0.315 mm; MP) and small (1.25-0.038 mm; SP) sizes by wet sieving and from all particle size fractions. The pdNDF content in ruminal LP, MP and SP was greater with grass compared to red clover silage diet while indigestible NDF (iNDF) content tended to be greater in LP of red clover compared to grass silage diet. The rumen evacuation, was slower for SP compared to LP and MP of both grass and red clover silage diets. Effective samples decreased in a quadratic manner by decreasing particle size but were not affected by treatment and were lower for faecal samples compared to ruminal samples. Effective ruminal LP and MP was slower but for SP was faster when determined by production compared tokd) is an important determinant of fibre digestion in ruminants. This studyin vivo digesta kinetic measurements arein vitro gas production from potentially digestible NDF (pdNDF) was measuredkd of pdNDF, estimated bykd and digestibility of pdNDF, estimated by gas production, of ruminalkd forin vitro gaskd estimated by rumen evacuation.


steady-state model; gas production; indigestible NDF; digestion rate; red clover,; grass

Published in

Grassland Science in Europe
2010, Volume: 15, pages: 470-472
Book title: Grassland in a Changing World: Proceedings of the 23th General Meeting of the European Grassland Federation
ISBN: 978-3-86944-021-7
Publisher: Mecke Druck und Verlag


23rd general Meeting of European Grassland Federation: Grassland in a Changing World

    SLU Authors

    • Huhtanen, Pekka

      • Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences

    UKÄ Subject classification

    Animal and Dairy Science
    Veterinary Science

    Permanent link to this page (URI)