| Material Information
||Preliminary observations on method of self-feeding soybean oilmeal to growing fattening pigs hogging off corn
||5 leaves : ; 28 cm.
||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
||Agricultural Experiment Station, Dept. of Animal Husbandry and Nutrition
||Place of Publication:
||Soybean as feed -- Florida ( lcsh )
Swine -- Feeding and feeds -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
non-fiction ( marcgt )
||Animal husbandry mimeograph series - UF Agricultural Experiment Station ; no. 54-1
||Statement of Responsibility:
||by H.D. Wallace, Larry Gillespie and John McKigney.
| Record Information
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 71297063
Animal Husbandry Mimeograph January, 1954
Series No. 51--I
UNIVERSITY OF FLORIDA
AGRICULTURAL EXPERIMENT STATION
WILLARD M. FIFIELD, Director
PRELIMINARY OBSERVATIONS ON IETT.OD OF S2LF-FEEDING
SOYBEAN OILEAL TO GROJINfG FATTENING
PIGS HOGGING OFF CORN1
H. D. WALLACE, LARRY QILLE3SPI and JOHN MCKIGNrY2
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-
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-
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.
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
' 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
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
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.