| Effects of adding polyclonal antibody preparations on ruminal fermentation patterns and digestibility of cows fed different energy sources. | |
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MedLine Citation:
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PMID: 21551346 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Nine ruminally cannulated cows fed different energy sources were used to evaluate an avian-derived polyclonal antibody preparation (PAP-MV) against the specific ruminal bacteria Streptococcus bovis, Fusobacterium necrophorum, Clostridium aminophilum, Peptostreptococcus anaerobius and Clostridium sticklandii and monensin (MON) on ruminal fermentation patterns and in vivo digestibility. The experimental design was three Latin squares 3 x 3 distinguished by the main energy source in the diet [dry-ground corn grain (CG), high moisture corn silage (HMCS) or citrus pulp (CiPu)]. Inside each Latin square, animals received one of the feed additives per period [none (CON), MON or PAP-MV]. Dry matter intake and ruminal fermentation parameters such as pH, total short chain fatty acids (tSCFA) which included acetate, propionate and butyrate, as well as, lactic acid and ammonia nitrogen (NH(3)-N) concentration were analyzed in this trial. Total tract dry matter apparent digestibility and its fractions were estimated using chromic oxide as an external marker. Each experimental period lasted 21 d. Ruminal fluid sampling was carried out on the last day of the period at 0, 2, 4, 6, 8, 10 and 12 h after the morning meal. Ruminal pH was higher (P = 0.006), 4 h postfeeding, in MON and PAP-MV groups when compared to CON. Acetate:propionate ratio was greater in PAP-MV compared with MON across sampling times. Polyclonal antibodies did not alter (P > 0.05) tSCFA, molar proportion of acetate and butyrate as well as lactic acid and NH(3)-N concentration. Ruminal pH was higher (P = 0.01), 4 h postfeeding, in CiPu diets compared with CG and HMCS. There was no interaction between feed additive and energy source (P > 0.05) for any of the digestibility coefficients analyzed. Starch digestibility was lower (P = 0.008) in PAP-MV when compared to CON and MON. In relation to energy sources, NDF digestibility was greater (P = 0.007) in CG and CiPu vs. HMCS diet. The digestibility of ADF was greater (P = 0.002) in CiPu diets followed by CG and HMCS. Feeding PAP-MV or monensin altered ruminal fermentation patterns and digestive function in cows; however those changes were independent of the main energy source of the diet. |
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Authors:
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C T Marino; W G Otero; P H M Rodrigues; A Dicostanzo; D D Millen; R L D Pacheco; N Dilorenzo; C L Martins; M B Arrigoni |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-6 |
Journal Detail:
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Title: Journal of animal science Volume: - ISSN: 1525-3163 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-5-9 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 Breeding and Nutrition, São Paulo State University (FMVZ-UNESP), Botucatu-SP, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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