Group Title: Animal husbandry mimeograph series - University of Florida Agricultural Experiment Station ; 55-3
Title: Combinations of detoxified tung nut meal and soybean oilmeal as sources of supplementary protein for swine
Full Citation
Permanent Link:
 Material Information
Title: Combinations of detoxified tung nut meal and soybean oilmeal as sources of supplementary protein for swine
Series Title: Animal husbandry mimeograph series
Physical Description: 4 leaves : ; 28 cm.
Language: English
Creator: Wallace, H. D ( Harold Dean )
Gillespie, Larry, 1925-
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: 1955
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 4).
Statement of Responsibility: H.D. Wallace and L. Gillespie.
General Note: Caption title.
General Note: "February, 1955."
 Record Information
Bibliographic ID: UF00072846
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 76925113

Full Text

MAR 17 1955

Animal Husbandry Mimeograph
Series No. 55-3 February, 1955


H. Do Wallace and L. Gillespie2

Tung nut meal is being produced in Florida in increasing quantities.

Thus far this high protein feed has found only limited application in animal

feeds. As yet no suitable method of utilizing the meal in swine rations has

been worked out. The main difficulty appears to be one of palatability.

Swine refuse to eat rations containing significant quantities of the meal.

Ordinarily processed meal is known to contain a toxic principle. It is not
known to what extent this toxic substance accounts for the low palatability.

However, it has been observed that even the detoxified meal is not relished

by the pig.

Soybean oilmeal is an excellent protein supplement for swine. However,

it is extremely palatable and when it is self-fed pigs tend to eat more than

is needed to economically balance their grain ration. This was demonstrated

by Wallace et al. (1). This experiment was undertaken to determine it a

mixture of detoxified tung nut meal and soybean oilmeal would make a satis-

factory protein supplement for self-feeding to swine*

A representative analysis of the detoxified tung nut meal, as provided
through the courtesy of Mr. V. M. Darsey of The Tropical Paint and Oil

Company of Cleveland, Ohio, is given in Table 1.

The detoxified tung nut meal was supplied by The Tropical Paint and Oil
Company of Cleveland, Ohio.
2Wallace, Associate Animal Husbandman, Agricultural Experiment Station,
Gillespie, Graduate Assistant, Department of Animal Husbandry and Nutrition
The technical assistance of W. E. Collins9 is gratefully acknowledged.

Table 1. Analysis of Detoxified Tung Meal

Crude protein (N x 6.25) 28.10
Crude fat 1,02
Crude fiber 13.62
Nitrogen free extract 47.20
Calcium 0.69
Potash 1.24
Phosphoric acid lo48
Iron 0.21
Magnesium 0*25


On July 6, 1954, thirty-two purebred Duroc and Hampshire pigs averaging

about 115 pounds were divided into three similar experimental groups. Each

group was confined on a one acre plot of native grass pasture*

All lots were fed yellow ear corn free choice and had access to ground

limestone, steamed bonemeal and iodized salt in a three compartmented min-

eral box at all times. Water was supplied by automatic waterers. Initially

the protein mixture for Lot I consisted of 90 parts soybean oilmeal and 10

parts tung meal; Lot II, 70 parts soybean oilmeal and 30 parts tung meal;

and Lot III, 50 parts soybean oilmeal and 50 parts tung meal. After two weeks

under this regime it became obvious that the pigs in Lots II and III were not

going to eat the protein supplement. Hence, it was decided to redesign the

experiment by reducing the amounts of tung nut meal. The final protein mix-

tures studied in the test were as follows:

Lot I 95 parts soybean oilmeal
5 parts tung meal

Lot II 90 parts soybean oilmeal
10 parts tung meal

Lot III 85 parts soybean oilmeal
15 parts tung meal

The soybean oilmeal was a L4 percent solvent extracted product*

Animals were removed from the experiment individually as they reached a

final weight of about 190 pounds

Results and Discussion

A summary of the experimental results is presented in Table 2,

Gains of animals in all lots were unsatisfactory. Hot dry weather

during the test period probably accounted for a significant share of the

poor performance. The differences in average daily gains for the three

lots of pigs were not significant.

Average daily consumption of supplement per head varied only slightly

among the lots. Feed conversion was similar for Lots 1 and 2. However,

pigs in Lot 3 required about 1/4 pound more feed per pound gain than those

in the first two lots. Estimates of the percentage crude protein in the to-

tal rations consumed were 10.7, 11.1, and 10.5 for Lots 1 through 3 respect-

ively. These levels of protein intake were probably inadequate for optimum

gains. It appears that the presence of the tung nut meal, even in the lim-

ited quantities used, reduced the palatability of the protein mixture too

severely for good results under the free choice method of feeding.


An attempt was made to utilize detoxified tung nut meal in a free-choice

protein supplemental mixture for growing-fattening swine* Results of the

test indicate that tung meal is unpalatable to pigs, Pigs refused to consume

mixtures containing 30 or 50 percent of tung meal in combination with soybean

oilmealo When the tung meal was reduced to 5, 10, and 15 percent of the

Table 2. Mixtures of Tung Nut Meal and Soybean Oilmeal as
Protein Supplements for Growing-Fattening Swine

f pplemental 95 parts soybeam oilmeal 90 parts soybeam oilmeal 85 parts soybean oilmeal
Protein Mixture 5 parts tung meal 10 parts tung meal 15 parts tung meal

Lot Number 1 2 3
Av. initial wt., Ibs. 117.3 1156 114*7
Av. final wt., Ibs* 190.6 188.6 187.3
Av. daily gain, Ibs, 1.06 1,00 1.11
Av. daily supplement consumed/pig, Ibs. .27 .29 o24
Supplement consumed/lb. gain, lbs. .25 .29 .22
Corn consumed/lb. gain, Ibs. (shelled
corn basis) 4a23 L.24 4.52
Total feed consumed/lb. gain, lbs. 4.48 4.53 6474
Av. no. days on expt. 72.1 73.4 65,6
Estimated percentage crude protein in
total ration consumed 10.7 11.1 10.5
No. of pigs 11 11 10

protein mixture, limited consumption occurred. However, consumption appeared

to be less than that required for optimum gains. It is concluded from this

study that the palatability of tung nut meal must be improved before it can

find a satisfactory place in swine rations.


1. Wallace, H. D., Larry Gillespie and John McKigney. 1954. Preliminary

observations on method of self-feeding soybean oilmeal to growing

fattening pigs hogging off corn. Animal Husbandry Mimeo. Series No. 5

University of Florida

Animal Husbandry
100 copies

University of Florida Home Page
© 2004 - 2010 University of Florida George A. Smathers Libraries.
All rights reserved.

Acceptable Use, Copyright, and Disclaimer Statement
Last updated October 10, 2010 - - mvs