Source:http://linkedlifedata.com/resource/pubmed/id/16230701
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
11
|
| pubmed:dateCreated |
2005-10-18
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| pubmed:abstractText |
The objective of this study was to use a within-cow, half-udder model to compare the effect of cessation of milk removal from mammary quarters within respective half udders at either 30 or 70 d before expected calving date (ECD) on the ability of the half udders to subsequently produce milk. Pregnant Holstein cows were assigned to control (n = 14) or treatment (TRT, n = 26) groups. All mammary quarters in the udder of cows in the control group had 70-d (68 +/- 9 d) dry periods, whereas in each cow of the TRT group, 1 randomly selected half udder was dried at 70 d before ECD and the other half udder continued to be milked twice daily until dried at 30 d before ECD. From 80 through 70 d before ECD, amounts of milk produced by the left and right half udders of cows in the TRT group were measured at the first-shift milking. No differences were detected in the actual or relative amounts of milk produced by the left (3.46 +/- 0.2 kg; 48.8 +/- 1.0%) and the right (3.63 +/- 0.2 kg; 51.2 +/- 1.0%) half udders. Furthermore, the actual and relative amounts of milk produced by the half udders (n = 12 left, 14 right) subsequently dry for 67 +/- 7 d (3.56 +/- 0.2 kg; 50.2 +/- 1.0%) and the half udders (n = 14 left, 12 right) subsequently dry for 27 +/- 7 d (3.54 +/- 0.2 kg; 49.8 +/- 1.0%) did not differ before they were dried. However, from 3 to 100 d of the subsequent lactation, the 30-d dry half udders produced 18.9% less milk than the 70-d dry half udders (16.3 vs. 20.1 +/- 1.0 kg/d). In addition, relative amounts of total-udder milk produced by the 30- and 70-d dry half udders in the same cow differed (44.9 vs. 55.1 +/- 0.2%, respectively). Cows in the control group produced more milk than cows in the TRT group through 80 DIM (39.5 vs. 35.2 +/- 0.6 kg/d), but not from 3 through 150 DIM (39.0 vs. 36.2 +/- 1.6 kg/d). Thus, half udders that produced the same actual and relative amounts of milk before being dried did not do so when given a 30-d dry period instead of a 70-d dry period. When compared with the pre-dry value (49.8%), the relative contribution of half udders dry for 30 d to the total milk yield during the first 100 DIM was decreased by 9.8%.
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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 |
Nov
|
| pubmed:issn |
1525-3198
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| pubmed:author | |
| pubmed:issnType |
Electronic
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| pubmed:volume |
88
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
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| pubmed:pagination |
3953-62
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| pubmed:dateRevised |
2006-11-15
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| pubmed:meshHeading |
pubmed-meshheading:16230701-Animals,
pubmed-meshheading:16230701-Birth Weight,
pubmed-meshheading:16230701-Body Composition,
pubmed-meshheading:16230701-Body Weight,
pubmed-meshheading:16230701-Cattle,
pubmed-meshheading:16230701-Colostrum,
pubmed-meshheading:16230701-Dairying,
pubmed-meshheading:16230701-Female,
pubmed-meshheading:16230701-Growth Hormone,
pubmed-meshheading:16230701-Lactation,
pubmed-meshheading:16230701-Least-Squares Analysis,
pubmed-meshheading:16230701-Mammary Glands, Animal,
pubmed-meshheading:16230701-Models, Statistical,
pubmed-meshheading:16230701-Parity,
pubmed-meshheading:16230701-Pregnancy,
pubmed-meshheading:16230701-Time Factors
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| pubmed:year |
2005
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| pubmed:articleTitle |
Milk production from Holstein half udders after concurrent thirty- and seventy-day dry periods.
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| pubmed:affiliation |
Department of Physiology, Burdur Veterinary Faculty, Akdeniz University, Turkey.
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| pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|