Historic note

Group Title: Mimeo report - University of Florida Range Cattle Experiment Station ; RCS68-3
Title: Feedlot performance of crossbred calves
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00074320/00001
 Material Information
Title: Feedlot performance of crossbred calves
Series Title: Mimeo report
Physical Description: 2, 1 p. : ; 28 cm.
Language: English
Creator: Peacock, F. M ( Fentress McCoughan ), 1922-
Range Cattle Experiment Station
Publisher: Range Cattle Experiment Station
Place of Publication: Ona FL
Publication Date: 1968
Subject: Calves -- Feeding and feeds -- Florida   ( lcsh )
Beef cattle breeds -- Florida   ( lcsh )
Calves -- Feed utilization efficiency -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
Statement of Responsibility: F.M. Peacock ... et al..
General Note: Caption title.
General Note: "May 1968."
Funding: Mimeo report (Range Cattle Experiment Station) ;
 Record Information
Bibliographic ID: UF00074320
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 86086749

Table of Contents
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        Page 2
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    Historic note
        Historic note
Full Text
/6 u

Range Cattle Experiment Station May968 .
Mimeo Report RCS68-3. .- i Yn

Feedlot Performance of Crossbred Calves/
M. P k' 16 1863
F. M. Peacock, W. G. Kirk, J. W.--Carpenter, I
M. Koger and A. Z. Palmer/
SI.A.S. Unv. o Forida
Weanling steer calves of different breeds and breed comBinations have

been studied in drylot on full feed at the Range:Cattl'e Experiment Station

since 1952. This study has been conducted since 1962 and is presented in

two parts. The first being on Brahman-Shorthorn-crosses as an approach to

test.calves produced from a crisscross breeding program when the Brahman.and

Shorthorn breeds are used. The second is on Brahman, Angus, Charolais, and

their crosses.

Breeding of Brahman-Shorthorn cross range from 3/4 Brahman-1/4

Shorthorn with 1/8 blood variations giving 'rise to five lots of animals.

One-hundred-five calves were fed over a three-year'period for 191-day

average. The ration fed consisted of 20'parts l4%'cottonseed meal, 40

citrus pulp, 21 ground snapped corn, 13 corn meal, 5 alfalfa, and 1 mineral

plus 2 1/2 pounds pangolagrass hay daily per steer. Calves were fed once

each day and at the end of each feeding trial were trucked to Lykes Brothers

packing plant and slaughtered. Warm carcass weights were obtained and

animals were graded after 48 hours in: the cooler. Actual weight of.calves
was used as the initial weight. To obtain realistic average daily gains for

Presented at Beef Cattle-Short Course, May 2-4, 1968, Gainesville.

Associate Animal Husbandman, Animal Scientist, Range Cattle Station,

Ona; Associate Meat Scientist, Animal Genetist, and Meat Scientist,

Animal Science Department, Gainesville.

comparisons, final weights of animals in both studies were adjusted based on

a 60% cold carcass dressing percentage... Cold carcass weights in this trial

were obtained by deducting 2 1/2% from the warm carcass weight. Results of

this study are given in Table 1.

The study on performance of Brahman, Angus, Charolais, and their crosses

has been conducted for three years. This study is not complete and will be

carried on for a few more years until sufficient data are obtained to make


The calves were out of Brahman, Angus, and 3/4 Charolais to 7/8

Charolais cows and sired by Brahman, Angus, and Charolais bulls. The calves

were fed by sire groups due to lack of facilities rather than in individual

breed groups which would have been desirable..

Animals were fed a ration consisting of 19 parts 41% cottonseed meal,

48 citrus pulp, 18 corn, 9 ground snapped corn, 5 alfalfa, and 1 mineral

plus 2 1/4 pounds hay daily per steer. Calves sired by the Brahman bull ate

814 pounds of feed per 100 pounds gain while those sired by the Angus bull

required 900 pounds, and by the Charolais bull.847 pounds. Calves were

slaughtered at the Meats-Laboratory, Gainesville, where slaughter and carcass

data were obtained. Cold carcass weights were obtained after 48 hours in the

cooler. Estimated percent yield equals estimated percent of boned and

closely trimmed major cuts of round, rump, loin, rib and chuck. Performance

and carcass data by individual breed groups are given in Table 2.

Table 1. Feedlot performance, dressing percentage and carcass
grade of Brahiman-Shorthorn crossbred calves.

3/4 B- 5/8 E- 1/2 B- 5/8 Sh- 3/4 Sh-
Breeding of animals 1/4 Sh 3/8 Sh 1/2 Sh 3/8 B 1/4 B

No. of animals 21 21 21 21 21
Days on feed 191 191 191 191 191

Av. initial weight 544 519 519 541 517
Av. final weight adj. to 60 D.P. 976 978 967 954 947

Av. daily gain 2.26 2.40 2.35 2.16 2.25

Weight shrunk carcass 586 587 580 572 568

Av. carcass grade G HoGood L.Ch. L.Ch. L.Ch.

Feed/100 lb. gain 875 895 902 905 896

Table 2. Feedlot performance and carcass characteristics of
Angus, Brahman, Charolais and their Crosses.

Ax Ax Char.
Angus Brah. Char. Br. Char. x Br.

No. of aniJals 11 10 12 19 21 19

Days on feed 178 178 178 178 178 178

Beginning weight 377 448 623 466 492 560
Final adj. weight at 60 D.P. 715 797 1050 873 895 977

Adj. daily gain at 60 D.P. 1.90 1.96 2.40 2.29 2.26 2.34

Carcass weight 429 478 630 524 537 586

Dressing percent 60.51 61.60 62.31 62.46 61.65 62.54

Federal grade Ch G G+ G++ Ch- G
Fat over eye 0.41 0.29 0.24 0.40 0.33 0.29
Rib e-e area 8.73 9.25 12.40 9.94 10.30 10.61

Estimated yield 50.18 50,90 52.01 50.02 50.65 50.79


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