Source:http://linkedlifedata.com/resource/pubmed/id/15827257
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
5
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| pubmed:dateCreated |
2005-4-13
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| pubmed:abstractText |
The effects of grain adaptation protocol on subacute acidosis and feed intake by cattle were studied in a completely randomized experiment using 12 crossbred heifers (384 +/- 25 kg BW). The dietary proportion of concentrate was increased from 40 to 90% (DM basis) either by rapid adaptation (65% concentrate diet fed for 3 d) or by gradual adaptation (five intermediate diets containing 48.3, 56.7, 65.0, 73.3, and 81.7% concentrate, fed for 3 d each). Feed intake and ruminal pH (by indwelling ruminal electrodes) were monitored over 20 d. Mean daily pH variables did not differ (P > or = 0.10) between treatments on any of the 3 or 4 d that 65 or 90% concentrate was fed. Variances of a number of pH variables were greater (P < 0.05) for rapidly adapted heifers than for those on the gradual adaptation protocol during adaptation to 65 and 90% concentrate. Mean hourly pH did not differ over the first 24 h of adaptation to 65% concentrate, but variance of hourly pH tended (P < 0.10) to be greater for rapidly adapted than for gradually adapted heifers for eight of the first 24 h. On the first day of feeding 90% concentrate, ruminal pH tended (P = 0.07) to be less at 11 and 12 h after feeding with rapid adaptation than with gradual adaptation. Variance of hourly pH increased steadily in rapidly adapted heifers from 6 h after feeding onward. Ruminal VFA concentration and osmolality did not differ between treatments. Ruminal lactate concentration was < 1 mM, except in two rapidly adapted heifers and one gradually adapted heifer after introduction to 90% concentrate. Adaptation method did not affect DMI or day-to-day variation in DMI. Detection of acidosis was associated with increased variance in ruminal pH variables. A range of individual responses to grain challenge was observed, but current management strategies for preventing acidosis in pens of cattle are based on responses of the most susceptible individuals. A better understanding of factors governing individual responses to acidotic challenge may allow for the development of more effective acidosis prevention practices.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:chemical | |
| pubmed:status |
MEDLINE
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| pubmed:month |
May
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| pubmed:issn |
1525-3163
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| pubmed:author | |
| pubmed:issnType |
Electronic
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| pubmed:volume |
83
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
1116-32
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| pubmed:meshHeading |
pubmed-meshheading:15827257-Acidosis,
pubmed-meshheading:15827257-Adaptation, Physiological,
pubmed-meshheading:15827257-Animal Feed,
pubmed-meshheading:15827257-Animal Husbandry,
pubmed-meshheading:15827257-Animals,
pubmed-meshheading:15827257-Area Under Curve,
pubmed-meshheading:15827257-Blood Chemical Analysis,
pubmed-meshheading:15827257-Blood Glucose,
pubmed-meshheading:15827257-Carbon Dioxide,
pubmed-meshheading:15827257-Cattle,
pubmed-meshheading:15827257-Cattle Diseases,
pubmed-meshheading:15827257-Eating,
pubmed-meshheading:15827257-Fatty Acids, Volatile,
pubmed-meshheading:15827257-Female,
pubmed-meshheading:15827257-Fermentation,
pubmed-meshheading:15827257-Food, Formulated,
pubmed-meshheading:15827257-Hematocrit,
pubmed-meshheading:15827257-Hydrogen-Ion Concentration,
pubmed-meshheading:15827257-L-Lactate Dehydrogenase,
pubmed-meshheading:15827257-Random Allocation,
pubmed-meshheading:15827257-Rumen,
pubmed-meshheading:15827257-Time Factors
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| pubmed:year |
2005
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| pubmed:articleTitle |
Effect of rapid or gradual grain adaptation on subacute acidosis and feed intake by feedlot cattle.
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| pubmed:affiliation |
Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta, T1J 4B1, Canada.
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| pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, Non-U.S. Gov't
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