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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
3
|
| pubmed:dateCreated |
1993-5-6
|
| pubmed:abstractText |
Two beef production systems were evaluated in conjunction with an evaluation of escape protein sources for finishing calves. Two hundred forty crossbred steers and 80 crossbred heifer calves (BW = 267 +/- 2 kg) were split into two groups: 1) control, finished (207 d) after a 3-wk feedlot adjustment period and 2) grazing cornstalks for 74 d after a 3-wk feedlot adjustment period, then finished (164 d). Finishing treatments were sources and proportions of supplemental CP: 1) urea 100%; 2) soybean meal (SBM) 100%; 3) blood meal (BM) 50%, urea 50%; 4) feather meal (FTH) 50%, urea 50%; 5) SBM 50%, FTH 25%, urea 25%; 6) SBM 25%, FTH 38%, urea 37%; 7) FTH 25%, BM 25%, urea 50%, and 8) FTH 38%, BM 13%, urea 50%. Treatments 1 to 8 were fed in dry-rolled corn (DRC)-based diets. Treatments 9 and 10 were supplement Treatments 1 and 7 fed in diets based on high-moisture corn. Calves finished after a 74-d period of grazing cornstalks consumed more feed (P < .01) and gained faster (P < .01) but were less efficient (P < .05) than calves finished directly after weaning. Although not statistically different, calves finished after grazing cornstalks and supplemented with natural protein in the feedlot were 7% more efficient than calves supplemented with urea alone. Efficiency of calves finished directly after weaning was similar for calves supplemented with natural protein or urea alone. Supplementing SBM/FTH/urea or BM/FTH/urea improved feed efficiency compared with supplementing FTH/urea alone. These data suggest that allowing calves to graze cornstalks before finishing is a possible management option, but this system may require more metabolizable protein in the finishing diet to maximize feed efficiency if the calves are expressing compensatory growth.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Mar
|
| pubmed:issn |
0021-8812
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| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
71
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
740-52
|
| pubmed:dateRevised |
2003-11-14
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| pubmed:meshHeading |
pubmed-meshheading:8463161-Animal Feed,
pubmed-meshheading:8463161-Animal Husbandry,
pubmed-meshheading:8463161-Animals,
pubmed-meshheading:8463161-Cattle,
pubmed-meshheading:8463161-Dietary Proteins,
pubmed-meshheading:8463161-Eating,
pubmed-meshheading:8463161-Female,
pubmed-meshheading:8463161-Food, Fortified,
pubmed-meshheading:8463161-Male,
pubmed-meshheading:8463161-Random Allocation,
pubmed-meshheading:8463161-Weaning,
pubmed-meshheading:8463161-Weight Gain,
pubmed-meshheading:8463161-Zea mays
|
| pubmed:year |
1993
|
| pubmed:articleTitle |
Protein sources for finishing calves as affected by management system.
|
| pubmed:affiliation |
Department of Animal Science, University of Nebraska, Lincoln 68583-0908.
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| pubmed:publicationType |
Journal Article
|