Source:http://linkedlifedata.com/resource/pubmed/id/11862967
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
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| pubmed:dateCreated |
2002-2-25
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| pubmed:abstractText |
Objectives were to determine net release or uptake of a-amino N, ammonia N, and urea N across portal-drained viscera, liver, splanchnic, and mammary tissues of lactating Holstein cows (n = 6; 109 +/- 9 d in milk) fed alfalfa hay-based total mixed rations (TMR) containing 40% steam-rolled or steam-flaked corn grain. The TMR were offered at 12-h intervals in a crossover design. Blood samples were obtained from indwelling catheters in portal, hepatic, and mammary veins and mesenteric or costo abdominal arteries, every 2 h for each cow and diet. Steam-flaked compared with steam-rolled corn greatly increased in vitro starch hydrolysis (56 vs. 34%). Daily intake of dry matter (18.4 +/- 0.4 kg/d), starch, N, and net energy for lactation by cows were not altered by processing corn; neither were daily yield of milk (29.1 +/- 0.7 kg/d), fat-corrected milk, nor fat-corrected milk per dry matter intake. Steam-flaking tended to increase percent milk protein (2.97 vs. 2.82%; P = 0.07), but not yield, and decrease percent lactose (4.83 vs. 4.94) but not yield. Portal and hepatic blood flows were not affected by diet, nor were net absorption of alpha-amino N and ammonia N. Steam-flaking compared with steam-rolling increased urea N cycling to portal-drained viscera (212 vs. 87 g/d) by 140%, estimated mammary uptake and extraction ratio of alpha-amino N. Flaking versus rolling of corn improved N utilization in dairy cows by increasing urea cycling to the gut and uptake of a-amino N by the mammary gland. Higher mammary uptake of alpha-amino N (78 vs. 50 g/d) by dairy cows fed steam-flaked corn tended to increase milk protein content and may explain the previously observed effects of cows fed steam-flaked versus steam-rolled corn.
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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
|
| pubmed:issn |
0022-0302
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| pubmed:author |
pubmed-author:AlixJJ,
pubmed-author:CuneotPP,
pubmed-author:De YoungH DHD,
pubmed-author:Delgado-ElorduyAA,
pubmed-author:HuberJ TJT,
pubmed-author:LozanoOO,
pubmed-author:NussioCC,
pubmed-author:NussioLL,
pubmed-author:SadhuVV,
pubmed-author:SantosJ E PJE,
pubmed-author:SimasI JIJ,
pubmed-author:TagariHH,
pubmed-author:TheurerC BCB,
pubmed-author:WebbK EKEJr
|
| pubmed:issnType |
Print
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| pubmed:volume |
85
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
160-8
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| pubmed:dateRevised |
2008-11-21
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| pubmed:meshHeading |
pubmed-meshheading:11862967-Animal Feed,
pubmed-meshheading:11862967-Animal Nutritional Physiological Phenomena,
pubmed-meshheading:11862967-Animals,
pubmed-meshheading:11862967-Blood Urea Nitrogen,
pubmed-meshheading:11862967-Cattle,
pubmed-meshheading:11862967-Cross-Over Studies,
pubmed-meshheading:11862967-Diet,
pubmed-meshheading:11862967-Female,
pubmed-meshheading:11862967-Food Handling,
pubmed-meshheading:11862967-Intestinal Absorption,
pubmed-meshheading:11862967-Lactation,
pubmed-meshheading:11862967-Lactose,
pubmed-meshheading:11862967-Liver,
pubmed-meshheading:11862967-Milk,
pubmed-meshheading:11862967-Milk Proteins,
pubmed-meshheading:11862967-Nitrogen,
pubmed-meshheading:11862967-Portal System,
pubmed-meshheading:11862967-Random Allocation,
pubmed-meshheading:11862967-Splanchnic Circulation,
pubmed-meshheading:11862967-Zea mays
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| pubmed:year |
2002
|
| pubmed:articleTitle |
Splanchnic and mammary nitrogen metabolism by dairy cows fed steam-rolled or steam-flaked corn.
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| pubmed:affiliation |
Department of Animal Sciences, University of Arizona, Tucson 85721, USA.
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| pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
|