Rumen Stability of Two Rumen-Protected Choline Products
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Date
2008-06
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The Ohio State University
Abstract
The goals of the modern dairy producer are much higher than those of past producers. Therefore, emphasis on vitamins and dietary supplements is required to ensure that dairy cows are healthy and are able to meet the high production demands placed upon them. This project is very much a part of this ultimate goal as it examines the effects two rumen-protected choline products have on the dry matter (DM) and nitrogen (N) disappearance in rumen digesta. In this experiment, 2 rumen-protected choline products, [ProCholine™ 50 (P-50), Probiotech, Inc., St-Eustache, QC, Canada; and Reashure®, Balchem Encapsulates, New Hampton, NY] were incubated in situ in 2 rumen cannulated cows. Dacron bags containing the product samples were placed into the rumen of each cow. Two bags per product (~ 2.5 g of product) per cow were removed at the same time intervals: 0, 2, 4, 6, 12, 24, and 48 hours. The material remaining in the bags after incubation were analyzed for DM (105oC oven overnight), N (Kjeldahl, strong acid method). DM analysis showed that Reashure® is a much more rumen-stable product, as its rate of disappearance was 1.15% per hour with a rumen degradation of 2.62% over 48 hours. ProCholine™ 50, however, had a 27.50% per hour disappearance and degraded 38.70% over 48 hours. Nitrogen analysis reaffirmed this trend: Reashure® had a 1.75%per hour rate of disappearance and a 12.54% degradation over 48 hours. Pro-Choline ™ 50 had a 16.85% rate of disappearance and a 57.30% degradation over 48 hours.
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Ruminant Nutrition