Rumen-Bypass Amino Acids In Three Branded Products

05/2004

Venue

Rumen Profiling Laboratory, West Virginia University.

Summary

Three protein supplements were evaluated to determine the bypass value of their amino acids and protein. Samples were incubated in the rumen of a fistulated Holstein cow for 16 hours. The cow was in early lactation and producing 80 pounds of milk daily. Samples were run in triplicate.

Results

The Rumen Profiling Laboratory of West Virginia University reported higher rumen-bypass values for methionine, lysine, histidine, threonine and protein in Soy Best than in Dakota Gold and Alberta Gold. Soy Best is a soybean-based product, Dakota Gold is a corn-based product and Alberta Gold is a canola-based product.

	Soy Best	Dakota Gold	Alberta Gold
Histidine Bypass, % of total:	68.49	56.65	55.41
Threonine Bypass, % of total:	71.03	61.50	66.72
Lysine Bypass, % of total:	69.79	61.13	61.19
Methionine Bypass, % of total:	78.40	68.88	60.89
Protein Bypass, % of total:	73.34	61.23	61.35