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Feeding value of glycerol as a replacement for corn grain in rations fed to lactating dairy cows.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Donkin, Shawn S. Koser, Stephanie L. White, Heather M. Doane, Perry H. Cecava, Michael J. |
| Copyright Year | 2009 |
| Abstract | Growth of the corn ethanol industry has created a need for alternatives to corn for lactating dairy cows. Concurrent expansion in soydiesel production is expected to increase availability and promote favorable pricing for glycerol, a primary co-product material. The objective of this study was to determine the feeding value of glycerol as a replacement for corn in diets fed to lactating dairy cattle. Sixty lactating Holstein cows housed in individual tie stalls were fed a base diet consisting of corn silage, legume forages, corn grain, soyhulls, roasted soybeans, and protein supplements. After a 2-wk acclimation period, cows were fed diets containing 0, 5, 10, or 15% refined glycerol for 56 d. Cows were milked twice daily and weekly milk samples were collected. Milk production was 36.3, 37.2, 37.9, and 36.2 +/- 1.6 kg/d and feed intake was 23.8, 24.6, 24.8, and 24.0 +/- 0.7 kg/d for 0, 5, 10, and 15% glycerol treatments, respectively, and did not differ except for a modest reduction in feed intake during the first 7 d of the trial for 15% glycerol (treatment x time effect). Milk composition was not altered by glycerol feeding except that milk urea nitrogen was decreased from 12.5 +/- 0.4 to 10.2 +/- 0.4 mg/dL with glycerol addition. Cows fed diets containing 10 and 15% glycerol gained more weight than those fed rations containing 0 or 5% glycerol but body condition scores did not differ with glycerol feeding. The data indicate that glycerol is a suitable replacement for corn grain in diets for lactating dairy cattle and that it may be included in rations to a level of at least 15% of dry matter without adverse effects on milk production or milk composition. |
| File Format | PDF HTM / HTML |
| DOI | 10.3168/jds.2009-2201 |
| PubMed reference number | 19762829 |
| Journal | Medline |
| Volume Number | 92 |
| Issue Number | 10 |
| Alternate Webpage(s) | http://www.biofuelscoproducts.umn.edu/sites/biodieselfeeds.cfans.umn.edu/files/2009-donkin-feeding_value_of_glycerol_as_a_replacement_for_corn_grain.pdf |
| Journal | Journal of dairy science |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
