Group Title: Animal husbandry mimeograph series - UF Agricultural Experiment Station ; no. 54-1
Title: Preliminary observations on method of self-feeding soybean oilmeal to growing fattening pigs hogging off corn
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 Material Information
Title: Preliminary observations on method of self-feeding soybean oilmeal to growing fattening pigs hogging off corn
Physical Description: 5 leaves : ; 28 cm.
Language: English
Creator: Wallace, H. D. ( Harold Dean )
Gillespie, Larry, 1925-
McKigney, John I
University of Florida -- Agricultural Experiment Station
University of Florida -- Dept. of Animal Husbandry and Nutrition
Publisher: Agricultural Experiment Station, Dept. of Animal Husbandry and Nutrition
Place of Publication: Gainesville, Fla.
Publication Date: 1954
Subject: Soybean as feed -- Florida   ( lcsh )
Swine -- Feeding and feeds -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
General Note: Animal husbandry mimeograph series - UF Agricultural Experiment Station ; no. 54-1
General Note: "January, 1954."
Statement of Responsibility: by H.D. Wallace, Larry Gillespie and John McKigney.
 Record Information
Bibliographic ID: UF00072838
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 71297063

Full Text

JUN 195,

Animal Husbandry Mimeograph January, 1954
Series No. 51--I





Soybean oilmeal is an excellent protein supplement for swine.

Recent tests at this station have indicated that very satisfactory

gains can be obtained in drylot with corn soybean meal rations which

are well fortified with vitamins and minerals. Soybean oilmeal is

normally a very palatable feed for swine. Pigs like it very well and

will invariably consume greater quantities than needed to balance a

grain ration when the meal is self-fed. This is particularly true

of animals weighing 75 pounds and upwards. These heavier pigs are

most suitable for hogging off corn and thus a real problem exists in

self-feeding of soybean oilmeal.

The experiment herein reported was designed to determine a satis-

factory method of self-feeding soybean oilmeal to swine hogging off


1. The assistance of Mr. W. E. Collins, Swine Herdsman, is grate-
fully acknowledged.

2. Wallace, Associate Animal Husbandman; Gillespie and McKigney,
Graduate Assistants, Department of Animal Husbandry and Nutrition.


Twenty-one purebred Duroc and Hampshire X Duroc crossbreds, aver-

aging approximately 92 pounds, were divided into three similar groups

and self-fed the following mixtures while hogging off corn:

Lot 1 Straight Soybean Oilmeal

Lot 2 A Mixture of 1/2 Soybean Oilmeal
and 1/2 Ground Whole Oats

Lot 3 A Mixture of 1/3 Soybean Oilmeal
and 2/3 Ground Whole Oats

Each lot of pigs had approximately 2 acres of corn to harvest.

The corn had been estimated to yeild about 30 bushels per acre. Corn

in all lots was well matured at the time the experimental animals

were turned in. There was a considerable amount of crab grass and

other native vegetation in all of the fields. A 3-compartmented

mineral box containing fresh limestone, steamed bonemeal, and trace

mineralized salt was available to each group of pigs. Water was

provided by automatic waterers. The experiment was terminated a few

days before the supply of corn became low in any one of the experi-

mental lots.

Results and Discussion

As shown in Table 1 all groups of pigs made very satisfactory

and very similar gains. Lot 1 (all soybean oilmeal) gained at a

rate of 1.45 lbs. per day; Lot 2 (1/2 soybean oilmeal and 1/2 ground

oats) gained at a rate of 1.40 lbs. per day; and Lot 3 (1/3 soybean

oilmeal and 2/3 ground oats) gained at a rate of 1.0 lbs. per day.

0S -


Methods of Self-Feeding Soybean Oilmeal
to Swine Hogging Off Corn

Lot 2 Lot 3
Lot 1 Self-Fed a Mixture Self-Fed a Mixture
Treat t Self-Fed Soybean of 1/2 Soybean Oil- of 1/3 Soybean Oil-
STreatment Oilmeal meal and 1/2 Ground meal and 2/3 Ground
Oats Oats
' No. of pigs 7 7 7 1

SAv. initial wt. lbs. 91.6 92.8 92.8

SAv. final wt. Ibs. 177.3 178.1 175.2

STotal gain per lot Ibs. 600.0 597.0 577.0

SAv. daily gain Ibs. 1.45 1.40 140

' Total supplemental feed 652.0 1082.0 856.0
consumed, Ibs.

Soybean oilmeal consumed 1.08 .91 .49
per pound gain lbs.

Soybean oilmeal consumed 1.58 1.27 .69
per pig per day, Ibs.

Total feed costs per 100 $17.71 $16.08 $15.38
lbs. gain (exclusive of
minerals )*.
Corn $1.50 per bu.
S Oats 1.50 per bu.
' Soybean Oilmeal $96.00 per ton.


From the standpoint of gains alone there may be a slight advantage

for the straight soybean oilmeal. The total consumption of supple-

ments for Lots 1,2, and 3 respectively were 652, 1,082, and 856 pounds.

It appears that the 50-50 mixture was most acceptable to the pigs.

When the ground oats made up 2/3 of the mixture, the consumption was

significantly decreased. An examination of the figures on consump-

tion of soybean oilmeal per pig per day revealed that the pigs in

Lot III consumed approximately the amount of soybean oilmeal needed

to adequately balance the corn ration. They consumed an average of

0.69 pounds of soybean oilmeal per head per day. The other two lots

of pigs consumed considerably more meal than was needed. Lot 1

consumed better than twice the amount estimated to balance a corn

ration for pigs of this weight.

There was no exact method of measuring the consumption of corn

in various lots. Thus, it was not possible to make total cost es-

timates. However, it appeared that the animals on the three treat-

ments ate about the same quantities of grain (corn, or corn and oats),

and making this assumption the cost estimates were calculated as

shown in Table 1. These cost figures indicate a saving of $2.33 per

100 pounds gain between Lot 1 ( all soybean oilmeal) and Lot 3 (1/3

soybean oilmeal and 2/3 ground oats). All feed costs appear exces-

sively high. Prevailing retail feed prices at the time the experi.

ment was conducted were used in the estimates. They are given in

footnotes of Table 1.


An experiment was conducted to determine a suitable method for

self-feeding soybean oilmeal to swine hogging off corn. The results

indicate that straight soybean oilmeal is much too palatable to be

self-fed. A mixture of 1/,2 soybean oilmeal and 1/2 ground oats was

also consumed in greater quantities than needed to meet the protein

requirements. The most economical mixture consisted of 1/3 soybean

oilmeal and 2/3 ground oats. Pigs ate this combination in approxi-

mately the quantity essential to provide the needed protein.

On the basis of this preliminary experiment, it is recommended

that if soybean oilmeal or similar palatable meals such as peanut

-oilmeal are self-fed to swine as a source of supplementary protein,

the meal should be diluted with a high fiber material such as ground

oats in order to reduce consumption to an economical quantity. Ground

alfalfa, ground citrus pulp or other bulky feed materials might serve

this purpose just as well.

Animal Husbandry
200 copies

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