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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
11
|
| pubmed:dateCreated |
1995-6-1
|
| pubmed:abstractText |
Eight ruminally fistulated steers, 7 to 8 mo old, were used in a completely randomized, 2 x 2 factorial experiment to determine the effects of energy density and protein source in receiving diets on in situ DM, NDF, and N disappearance, concentrations of ruminal bacteria, protozoa, ammonia, and pH. Two energy densities (1.80 and 1.48 Mcal/kg of NEm) and two protein sources (spray-dried blood meal [SDBM] and soybean meal [SBM]) were compared. Fistulated steers were weaned, transported by truck, and held in a sale barn before their arrival at the feedlot. On d 0 (day of arrival at the feedlot), DMI was 62% of DMI on d 7 after arrival. Overall, feeding a high-energy diet resulted in lower (P < .01) in situ DM disappearance (DMD) of orchardgrass than feeding a low-energy diet at both 24 and 48 h. In situ 24-h DMD averaged 46.6% on d-3 and 41.6% on d 0, whereas 48-h in situ DMD on d -3 and 0 averaged 58.2 and 58.6%, respectively, indicating the ruminal microbial population was not inhibited in its ability to digest available substrate. Additionally, there were no differences (P > .10) in 48-h in situ NDF disappearance between d -3 and 0 (58.8 vs 57.8%), respectively. No differences (P > .10) occurred in the concentration of total bacteria, or cellulolytic bacteria, due to feed and water deprivation. Concentration of total protozoa was lower (P < .05) on d 0 than at any other time. Entodinium averaged 72.5% of genera before weaning, and more than 90% of genera found on all treatments by d 21. Diplodinium and Epidinium percentages tended to decline after weaning. Isotricha concentrations were low and Dasytricha were eliminated after d 7. In conclusion, the concentration of ruminal bacteria and the ability to digest available substrate were not decreased immediately after weaning, trucking, and 24 h of feed and water deprivation.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Nov
|
| pubmed:issn |
0021-8812
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
72
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
2969-79
|
| pubmed:dateRevised |
2009-11-19
|
| pubmed:meshHeading |
pubmed-meshheading:7730193-Ammonia,
pubmed-meshheading:7730193-Animals,
pubmed-meshheading:7730193-Bacteria,
pubmed-meshheading:7730193-Cattle,
pubmed-meshheading:7730193-Cattle Diseases,
pubmed-meshheading:7730193-Dietary Fiber,
pubmed-meshheading:7730193-Dietary Proteins,
pubmed-meshheading:7730193-Digestion,
pubmed-meshheading:7730193-Eating,
pubmed-meshheading:7730193-Energy Metabolism,
pubmed-meshheading:7730193-Eukaryota,
pubmed-meshheading:7730193-Hydrogen-Ion Concentration,
pubmed-meshheading:7730193-Male,
pubmed-meshheading:7730193-Nitrogen,
pubmed-meshheading:7730193-Random Allocation,
pubmed-meshheading:7730193-Rumen,
pubmed-meshheading:7730193-Stress, Physiological,
pubmed-meshheading:7730193-Time Factors,
pubmed-meshheading:7730193-Weaning
|
| pubmed:year |
1994
|
| pubmed:articleTitle |
Ruminal characteristics, microbial populations, and digestive capabilities of newly weaned, stressed calves.
|
| pubmed:affiliation |
Department of Animal Science, Ohio Agricultural Research and Development Center.
|
| pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
|