Gas production kinetics in predictions of voluntary
intake of grass silage by cattle

S. J. Krizsan; M. Hetta; Å. T. Randby; P. Huhtanen

doi:10.22358/jafs/66071/2012

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ORIGINAL PAPER

Gas production kinetics in predictions of voluntary intake of grass silage by cattle

S. J. Krizsan ^1,2

M. Hetta ²

Å. T. Randby ¹

P. Huhtanen ²

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Norwegian University of Life Sciences, Department of Animal and Aquacultural Sciences, P.O. Box 5003, NO-1432 Ås, Norway

Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden, S-901 83 Umeå, Sweden

Publication date: 2012-06-18

Corresponding author

S. J. Krizsan

Norwegian University of Life Sciences, Department of Animal and Aquacultural Sciences, P.O. Box 5003, NO-1432 Ås, Norway; Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden, S-901 83 Umeå, Sweden

J. Anim. Feed Sci. 2012;21(2):234-250

DOI: https://doi.org/10.22358/jafs/66071/2012

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KEYWORDS

cattle

ABSTRACT

The objective of this study was to predict voluntary intake by cattle of grass silages of different fermentation quality from in vitro gas production data. Further, biological concepts of intake related gas data were examined by cluster analysis to silage chemical composition. Samples from 24 grass silages were characterized from their gas profiles. Observed silage dry matter intake was modelled by partial least squares regression analysis. Cumulative gas volumes and rates of gas production during early incubation, asymptotic gas volume as well as discrete lag time, and cumulative gas volumes at 48 and 72 h were the best descriptors of the variation in silage intake. The discrete lag time had a strong negative influence on intake and made up clusters with chemical variables indicating secondary fermentation. In vitro gas production data did not improve silage dry matter intake predictions compared with current models based on chemical analysis of silage fermentation quality.

CITATIONS (1):

An in vitro evaluation of browser and grazer fermentation efficiency and microbiota using European moose spring and summer foods
Sophie J. Krizsan, Alejandro Mateos-Rivera, Stefan Bertilsson, Annika Felton, Anne Anttila, Mohammad Ramin, Merko Vaga, Helena Gidlund, Pekka Huhtanen
Ecology and Evolution

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