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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1997-4-23
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pubmed:abstractText |
Thirty-six Alpine goats (10 primiparous and 26 multiparous) were used to study the milk yield response induced by recombinant bST administered in a sustained-delivery vehicle. Eighteen goats were injected with recombinant bST at 4-wk intervals from about 7 wk postpartum for 12 wk. Patterns of milk yield were highly affected by injection of recombinant bST. Milk yield of treated goats increased from day of injection, peaked between d 3 to 5 after treatment, and then decreased progressively. This pattern of response was well fitted by a curve containing two exponential terms: Yi = A x [exp(-k1di - exp(-k2di)], where Yi = daily relative response of treated goats to recombinant bST, computed as a deviation of least squares means of milk yield at day i (i = 0,..., 26) of the treatment interval from least squares means of milk yield at d 27 of the treatment interval; A = constant; k1 and k2 = response rate parameters; and di = day from treatment (i = 0,..., 27). Administration of recombinant bST also improved persistency of lactation, and the overall milk yield response to exogenous hormone was 300 g/d (13.9%) higher than the yield of untreated goats. This response was due to both the short-term response immediately after injection (53%) and the medium-term effect on lactation persistency.
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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 |
Jan
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pubmed:issn |
0022-0302
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
80
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
46-51
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:9120095-Animals,
pubmed-meshheading:9120095-Cattle,
pubmed-meshheading:9120095-Delayed-Action Preparations,
pubmed-meshheading:9120095-Female,
pubmed-meshheading:9120095-Goats,
pubmed-meshheading:9120095-Growth Hormone,
pubmed-meshheading:9120095-Injections, Subcutaneous,
pubmed-meshheading:9120095-Kinetics,
pubmed-meshheading:9120095-Lactation,
pubmed-meshheading:9120095-Recombinant Proteins
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pubmed:year |
1997
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pubmed:articleTitle |
Effect of slow-release somatotropin on the pattern of milk yield between and within injection intervals.
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pubmed:affiliation |
Department of Animal Science, University of Padova, Legnaro, Italy.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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