| Effects of a molasses-coated cottonseed product on diet digestibility, performance, and milk fatty acid profile of lactating dairy cattle. | |
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MedLine Citation:
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PMID: 20630230 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An experiment was conducted to evaluate the effects of a molasses-coated cottonseed product on nutrient digestibility and milk fatty acid (FA) composition of lactating dairy cattle. The effect of a direct-fed microbial (DFM) product was also examined. Twelve Holstein cows (693+/-85kg of body weight, 127+/-39 d in milk, 2.08+/-0.29 lactations; mean +/- SD) were randomly assigned to sequence in a replicated 4 x 4 Latin square design balanced for carryover effects. Cows were fed 1 of 4 treatments during each of the four 14-d periods: a control diet including 11.4% (dry matter basis) reginned cottonseed (CON), a diet with 14.4% molasses-coated cottonseed to match the cottonseed inclusion rate of the control diet (TC), the control diet with the addition of a liquid form of the cotton coating used to produce molasses-coated cottonseed (LC), and the LC diet with the addition of a DFM (LC+DFM). Diets were formulated for equal concentrations of neutral detergent fiber, crude protein, ether extract, and macrominerals. Treatments had no effect on dry matter intake, apparent total-tract nutrient digestibility, or milk production. The molasses coat, in either form, tended to decrease concentrations of odd-chain FA (2.25 and 2.31 vs. 2.35 g/100g of FA for TC, LC, and CON, respectively) and unsaturated FA (31.4 and 31.1 vs. 32.1 g/100g of FA) in milk. This could be indicative of a mild shift in ruminal fermentation away from propionate-producing bacteria toward fiber-digesting bacteria responsible for biohydrogenation of FA. The form of the molasses coating had few effects, but LC significantly decreased concentrations of total trans-C18:1 (2.04 vs. 2.30+/-0.13 g/100g of FA) and polyunsaturated FA (4.81 vs. 5.01+/-0.17) compared with TC, implying that the liquid form slightly enhanced ruminal FA biohydrogenation. Furthermore, adding the DFM to the LC diet tended to increase the proportion of long-chain FA (FA >C16) and significantly increased the proportions of trans-C18:1 (2.22 vs. 2.04+/-0.13 g/100g of FA) and unsaturated FA (32.4 vs. 31.1+/-0.7 g/100g of FA), suggesting an inhibitory effect on ruminal biohydrogenation. Results suggest that coating cottonseed with a hardened molasses product does not significantly depress nutrient digestibility and may provide a convenient method of incorporating these ingredients into dairy rations. |
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Authors:
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C R Mullins; B J Bradford |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 93 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-15 Completed Date: 2010-12-14 Revised Date: 2011-01-12 |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 3128-35 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Animal Sciences and Industry, Kansas State University, Manhattan, KS, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed
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analysis,
standards Animals Cattle / metabolism, physiology* Cottonseed Oil / metabolism* Dairying Diet / veterinary* Digestion / physiology* Fatty Acids / chemistry Female Lactation / physiology* Milk / chemistry* Molasses* Random Allocation |
| Chemical | |
Reg. No./Substance:
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0/Cottonseed Oil; 0/Fatty Acids |
| Comments/Corrections | |
Erratum In:
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J Dairy Sci. 2011 Jan;94(1):536 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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