Group Title: Animal husbandry and nutrition mimeograph series - UF Dept. of Animal Husbandry and Nutrition ; no. 58-8
Title: Free-choice feeding vs. a complete mixed ration for finishing market swine
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 Material Information
Title: Free-choice feeding vs. a complete mixed ration for finishing market swine
Series Title: Animal husbandry and nutrition mimeograph series
Physical Description: 3 leaves : ; 28 cm.
Language: English
Creator: Hunt, J. W
Wallace, H. D ( Harold Dean )
Combs, G. E ( George Ernest ), 1927-
University of Florida -- Dept. of Animal Husbandry and Nutrition
Publisher: Florida Agricultural Experiment Station, Dept. of Animal Husbandry and Nutrition
Place of Publication: Gainesville Fla
Publication Date: 1958
Subject: Swine -- Feeding and feeds -- Florida   ( lcsh )
Swine -- Growth -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
bibliography   ( marcgt )
non-fiction   ( marcgt )
Bibliography: Includes bibliographical references (leaf 2).
Statement of Responsibility: J.W. Hunt, H.D. Wallace and G.E. Combs.
General Note: Caption title.
General Note: "March, 1958."
Funding: Animal husbandry & nutrition mimeograph series ;
 Record Information
Bibliographic ID: UF00072873
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 76953834

Full Text

Animal Husbandry and Nutrition Florida Agricultural
Mimeograph Series No. 58-8 Experiment Station
Galnesville, Florida
March 1958

J. W. Hunt, H. D. Wallace and G. E. Combs, Jr.I

In a previous report Wallace et al. (I) observed that pigs fed a complete mixed
ration gained significantly faster than pigs fed ground yellow corn and a protein
supplement free-choice. However, the free-choice fed pigs required less feed per
pound of gain and returned more profit per animal than those fed the complete mixed

The experiment reported here was undertaken to obtain additional information on
the relative economy of the two methods of feeding. In addii ion, a study was made
of the value of ground yellow corn as compared to ear corn/win used in the free-
choice method of feeding. o

Experimental Procedure V'
Twenty-seven pigs of mixed breeding and averaging approximately-,9 92:, nds in
weight initially were divided on the basis of weight, breed, and prev-ius treatment.
The pigs were confined in small lots which provided ample green forage in the form
of native grasses. Adequate shade and a constant supply of fresh water were pro-
vided. The experiment was begun on October 12, 1957 and was terminated by lot as
each lot of pigs averaged approximately 190 pounds. The feeding treatments were as

Lot I. Self Fed the Following Complete Mixture

Up to 125 Ibs. After 125 Ibs.
(16% protein) (12% protein)
Ground yellow corn 77.0 84.2
Soybean oil meal 20.2 13.0
Ground limestone 1.0 1.0
Steamed bone meal 1.0 1.0
Iodized salt 0.5 0.5
Trace minerals 0.1 0.1
Vitamin Supplement No. 2 (Pfizer) 0.1 0.1
Antibiotic Supplement TM-IO (Pfizer) 0.1 0.1

100.0 100.0

Hunt, Research Assistant; Wallace, Associate Animal Husbandman; and Combs,
Assistant Animal Husbandman, Department of Animal Husbandry and Nutrition, University
of Florida, Gainesville, Florida. The technical assistance of W. E. Collins and
L. S. Taylor, Swine Herdsmen, is gratefully acknowledged.

Lot 2. Self Fed Ground Yellow Corn and the Following
Supplemental Protein Mixture Free-Choice
Soybean oil meal 91.6
Ground limestone 3.0
Steamed bone meal 3.0
Iodized salt 1.5
Trace minerals 0.3
Vitamin Supplement No. 2 (Pfizer) 0.3
Antibiotic Supplement TM-IO (Pfizer) 0.3


Lot 3. Hand Fed All the Ear Corn They would Eat and
Self Fed the Same Supplemiental Protein Mixture
Fed Lot 2

Results and Discussion
Results of the experiment are summarized in table I. The pigs fed the complete
mixed ration (Lot 1) gained significantly faster (P<.01) than pigs fed free-choice
(Lots 2 and 3). In so doing, they required one week less time to reach a finished
weight, required less feed per pound of gain, and returned more profit per animal
than the free-choice fed animals. However, pigs in Lot 2 which were fed ground corn
and supplement free-choice performed very well and returned almost as much profit as
did the pigs of Lot I. The most striking result of the experiment was the compara-
tively poor performance of Lot 3 pigs which were fed ear corn and supplement free-
choice. The corn fed was extremely hard and this fact probably accounts for the
heavy consumption of protein supplement, which In turn increased feed costs con-
siderably and reduced returns.

An experiment involving 27 feeder pigs was conducted to compare the relative
economy of feeding a complete mixed ration as compared to the free-choice method of
finishing swine.

Pigs fed the complete mixed ration gained significantly faster, required 7 days
less time to reach market weight and returned more profit per animal than did pigs
fed either ground corn or ear corn on a free-choice basis.

Results of this test would suggest that the complete mixture method of feeding
was superior to the free-choice method of feeding. If a free-choice method of feed-
ing is used it would seem worth-while to grind the corn for animals of this weight,
particularly if the corn is one of the hard flinty varieties common to Florida.

Literature Cited
I. Wallace, H. D., G. E. Combs, Jr. and C. E. Haines. 1957. Free-Choice
Feeding Vs. A Complete Mixed Ration for Finishing Market Swine. Animal Husbandry
Mimeo Series No. 58-1. Fla. Agricultural Experiment Station, Gainesville.


Table I. Free-Choice Feeding Vs. A Complete
Mixed Ration for Finishing Swine

Dietary Treatment Complete Free-Choice Free-Choice
Mixed Ration Ground Corn Ear Corn

Lot Number I 2 3
Number of Pigs 9 8 9
Av. Initial Wt., Lbs. 92.8 90.4 93.3
Av. Final Wt., Lbs. 196.2 192.4 187.7
Av. Daily Gain, Lbs. 2.11 1.82 1.68
Av. Daily Feed Consumed, Lbs. 42
Corn 6.02 454
Protein Supplement -- 1.03 2.37
Total 7.71 7.05 6.91
Total Feed/Lb. Gain, Lbs. 3.65 3.87 4.10
Feed Cost/100 Lbs. Gain3 12.92 12.51 13.97
Returns/Pig over Feed Costs and
Initial Cost of Pig4 4.95 4.86 3.61
Days on Experiment 49 56 56

lOne pig died suddenly on the 43rd day of the trial. Cause of
determined. Feed consumed by this pig was estimated and subtracted

death was not
from total for

2Represents ground corn equivalent.

3Feed prices/cwt.: Corn $3.10,
grinding and mixing costs) $3.54.

4Sale price $18.00/cwt. for all

Supplement $4.00, Complete ration (including

lots. Initial cost of each feeder pig $17.00.



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