| The effect of replacing corn with glycerol on ruminal bacteria in continuous culture fermenters. | |
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MedLine Citation:
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PMID: 20880288 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The effects of substituting corn with glycerol on DNA concentration of selected ruminal bacteria were investigated using continuous fermenters. Four continuous culture fermenters were used in a 4 × 4 Latin Square design with four 10 days consecutive periods. Treatment diets (60:40 forage to concentrate) were fed at 45 g/day dry matter (DM) in three equal portions. Glycerol (0.995 g/g glycerol) was used to replace corn in a grain mix at proportions of 0% (T0; control), 15% (T15), 30% (T30) and 45% (T45). On day 10 of each period, samples were collected from each fermenter 3 h after the morning feeding and analysed for volatile fatty acid and bacterial DNA concentration. Glycerol substitution was related to significantly higher butyrate, valerate and isovalerate concentrations. Compared with the T0 diet, acetate concentration was significantly lower with the T30 and T45 diets whilst propionate concentration was higher only with the T45 diet. The DNA concentrations for Butyrivibrio fibrisolvens and Selenomonas ruminantium decreased with the T30 and T45 diets compared with the T0 diet. No differences in the DNA concentrations for Ruminococcus albus and Succinivibrio dextrinosolvens amongst diets were observed. The findings show that substituting 15% of the dietary corn with glycerol had no substantive effects on fermentation processing or ruminal bacteria. Higher substitution levels, however, may adversely affect ruminal bacteria and negatively impact acetate production. |
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Authors:
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A A Abughazaleh; S Abo El-Nor; S A Ibrahim |
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Publication Detail:
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Type: Journal Article Date: 2010-09-29 |
Journal Detail:
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Title: Journal of animal physiology and animal nutrition Volume: 95 ISSN: 1439-0396 ISO Abbreviation: J Anim Physiol Anim Nutr (Berl) Publication Date: 2011 Jun |
Date Detail:
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Created Date: 2011-04-07 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101126979 Medline TA: J Anim Physiol Anim Nutr (Berl) Country: Germany |
Other Details:
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Languages: eng Pagination: 313-9 Citation Subset: IM |
Copyright Information:
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© 2010 Blackwell Verlag GmbH. |
Affiliation:
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Department of Animal Science, Food & Nutrition, Southern Illinois University, Carbondale, IL, USA Dairy Science Department, Egyptian National Research Center, Cairo, Egypt Food and Nutritional Sciences Program, North Carolina A&T State University, Greensboro, NC, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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