Effect of extrusion of rapeseed oilmeal on rumen
degradability and intestinal digestibility

S. Michalak; A. Potkański

doi:10.22358/jafs/70539/2005

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Suppl. 1/2005 vol. 14

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Effect of extrusion of rapeseed oilmeal on rumen degradability and intestinal digestibility

S. Michalak ¹

A. Potkański ¹

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The August Cieszkowski Agricultural University of Poznań, Department of Animal Nutrition and Feed Management, Wołyńska 33, 60-637 Poznań, Poland

Publication date: 2005-06-21

Corresponding author

A. Potkański

The August Cieszkowski Agricultural University of Poznań, Department of Animal Nutrition and Feed Management, Wołyńska 33, 60-637 Poznań, Poland

J. Anim. Feed Sci. 2005;14(Suppl. 1):283-286

DOI: https://doi.org/10.22358/jafs/70539/2005

KEYWORDS

intestinal digestibility

ABSTRACT

Effective ruminal protein degradation (EPD) and the intestinal digestibility of undegraded protein (IUPD) of rapeseed oilmeal (RSM) subjected to extrusion at a temperature of 140^oC was determined. The protein EPD coefficient of the extruded rapeseed oilmeal (ERSM) was 55.5%, whereas that of the RSM not subjected to extrusion, 79.3%. The intestinal digestibility of rumen undegraded RSM protein was 55.5%, which was 38.3 percentage points lower than the IUPD of the ERSM. The total tract protein digestibility of both meals was similar. The high IUPD of the ERSM indicates a favourable shift of protein availability from the rumen to further sections of the gastrointestinal tract.

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