ORIGINAL PAPER
Effect of soyabean meal, rapeseed meal and extruded field bean seeds on duodenal amino acids supply in sheep
M. Urbaniak 1,   H. Król 1,   B. Zawadzka 1,   M. Kulik 1,   A. Frankiewicz 1,   A. Łyczyński 2,   E. Pospiech 3,   Z. Wasilewski 1
 
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1
August Cieszkowski Agricultural University, Department of Animal Nutrition and Feed Management, Wołyńska 33, 60-637 Poznań, Poland
2
August Cieszkowski Agricultural University, Department of Animal Raw Materials, Wołyńska 33, 60-637 Poznań, Poland
3
August Cieszkowski Agricultural University, Institute of Meat Technology, Wołyńska 33, 60-637 Poznań, Poland
Publication date: 2001-08-07
 
J. Anim. Feed Sci. 2001;10(3):435–446
 
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ABSTRACT
In the first of two experiments, four rumen cannulated wethers were used to determine the extent of rumen protein degradation in soyabean meal (SBM), rapeseed meal (RSM) and extruded field bean seeds (EFB), using the in sacco method. Rumen non-degradable N in SBM, RSM and EFB of total-N was 38, 29 and 48%, respectively. In the second experiment, four rams with cannulas in the duodenum were fed isoenergetic total mixed rations (TMR) containing similar amounts of protein truly digestible in the small intestine (PDI). TMR consisted of meadow hay and concentrate (50:50, DM basis) in which SBM, SBM+RSM and SBM+EFB were the main sources of protein. The highest, statistically significant (P<0.05) methionine and cystine concentrations in the duodenal digesta were found in sheep fed SBM+RSM diet, while the lowest - in those fed SBM+EFB diet. Significantly higher (P<0.05) flows of total N (33.49 g/day), non-ammonia N (33.08 g/day) and total amino acid (197.7 g/d) were observed in sheep fed rations with SBM + EFB.
ISSN:1230-1388