| Feeding motivation and plasma metabolites in pregnant sows fed diets rich in dietary fiber either once or twice daily. | |
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MedLine Citation:
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PMID: 22178853 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The present study investigated the effects of source and level of dietary fiber (DF) and feeding frequency (once vs. twice daily) on feeding motivation and plasma metabolites at four different time points post feeding. Sixty pregnant sows (4 blocks of 15 sows) were allocated to 1 of 5 diets within blocks. Four diets were restricted (approx. 35 MJ ME/d): a barley/wheat control diet (171 g DF/kg DM; 12 g DF/MJ ME), and 3 fiber diets formulated to contain 35% DF by including pectin residue (323 g DF/kg DM; 25 g DF/MJ ME), potato pulp (404 g DF/kg DM; 29 g DF/MJ ME), or sugar beet pulp (367 g DF/kg DM; 25 g DF/MJ ME). The fifth diet was a mixture including an equal amount of the 3 fiber diets offered semi ad libitum (354 g DF/kg DM; 25 g DF/MJ ME). The experimental period included 2 periods of 4 wk each. Restricted fed sows were fed once daily (0800 h) during the first period and twice daily (0800 and 1500 h) during the second period, or vice versa. Semi ad libitum fed sows had access to feed 6 times a day in both periods. In each period, the feeding motivation was assessed in an operant conditioning test, and samples of peripheral blood were taken in a balanced design, at 0900, 1200, 1900 and 0700 h, corresponding to 1, 4, 11 and 23 h after feeding for restricted sows fed once daily. No differences in the feeding motivation were found between the 4 restricted diets at any of the time points post feeding, but semi ad libitum fed sows had a lower feeding motivation (P < 0.001). Among the restricted fed sows, feeding twice daily resulted in lower feeding motivation at 1900 h (P < 0.001) and at 0700h (P < 0.05) compared to feeding once daily, but not at 0900 and 1200 h, indicating that feeding twice daily reduced feeding motivation during the night compared to feeding once daily. Among restricted fed sows, plasma levels of short-chain fatty acids (SCFA) were higher in sows fed high fiber diets compared to the control (P = 0.02). Nonesterified fatty acid (NEFA) was lowest in sows on the control diet and highest in sows on the potato diet, whereas sows on the pectin and sugar beet diets were intermediate (P < 0.001). Less diurnal variation in glucose (P < 0.001) was seen in sows on high fiber diets. In spite of the found effects on plasma metabolites, the applied level of fiber in the diet of restrictedly fed sows did not reduce their feeding motivation irrespective of fiber source. |
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Authors:
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M B Jensen; L J Pedersen; P K Theil; C C Yde; K E Bach Knudsen |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-16 |
Journal Detail:
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Title: Journal of animal science Volume: - ISSN: 1525-3163 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Animal Science, Faculty of Science and Technology, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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