| Material Information
||Preliminary observations on avocados as a feed for growing-fattening pigs
||Animal husbandry mimeograph series
||4 leaves : ; 28 cm.
||Gillespie, Larry, 1925-
Wallace, H. D ( Harold Dean )
University of Florida -- Dept. of Animal Husbandry and Nutrition
||University of Florida, Dept. of Animal Husbandry and Nutrition
||Place of Publication:
||Swine -- Feeding and feeds -- Florida ( lcsh )
Swine -- Growth -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
non-fiction ( marcgt )
||Statement of Responsibility:
||L. Gillespie and H.D. Wallace.
| Record Information
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 76928932
JUL8 8 9
Animal Husbandry Mimeograph
Series No. 55-8 July, 1955
PRELMINARY OBSERVATIONS ON AVOCADOS AS A FEED FOR
L. Gillespie and H. D. Wallace2
The avocado pear is being grown in Florida in increasing quantities. The
crop is very perishable and at present much of the cull and surplus fruit is
This experiment was undertaken to determine the feeding value of fresh cull
avocado fruit for growing-fattening swine. It was hoped that this information
might be useful in helping to dispose of waste avocados.
Eight weanling pigs were divided into two similar lots and treated as
Lot I Basal ration
Lot II Basal ration plus avocado halves free choice (seeds removed)
Both lots were self-fed the following basal ration:
Ground yellow corn 77.0
Soybean meal 21.0
Ground limestone 1.0
Steamed bonemeal 0,5
Salt-trace mineral 0.53
lThe avocados were supplied by the South Florida Growers Association through
the courtesy of Mr. F. W. Ludington*
2Gillespie, Graduate Assistant, Department of Animal Husbandry and Nutrition;
Wallace, Associate Animal Husbandman, Department of Animal Husbandry and Nutrition;
The technical assistance of Mr. W. E. Collins, Swine Herdsman is gratefully
The salt-trace mineral mixture was composed of 50 pounds of iodized salt,
921 gins manganese sulfate, 398 gns. ferrous sulfate, 125 gms, copper sulfate,
and 10 gis. cobalt carbonate. The following levels of B-vitamins were added to
the basal ration per 100 lbs. of feed: thiamine 1 gmp, riboflavin 230 mg.,
niacin 2.33 gm., pantothenic acid 1 gm., pyridoxine 375 mg., choline chloride
19.4 gm., folio acid 22.7 mg. and vitamin B-12 1.0 mg.
The pigs were fed in concrete pens whioh were washed daily. The avocados
were hand fed in a wooden trough each morning.
The experiment started February 5, 1955, and was terminated at the end of
39 days. One pig in each lot was started on the test 12 days after the beginning
of the experiment and was on test only 27 days.
Two pigs were offered avocado pulp only and one pig was offered avocado seed
only, in separate trials. These tests were of short duration and were not sun-
marized in detail*
Results and Diseusson
A sunmary of the main experiment is presented in Table 1. Gains of the
pigs in both lots were satisfactory. Pigs in lot 1 gained at the rate of 1.57 and
those in Lot 2, 1.61 lbs. per head daily.
The basal feed requirement per pound of gain was 2.94 and 2.48 lbs. for
Lots 1 and 2 respectively. The pigs in Lot 2 ate an additional 4.43 lbs, of
avocado pulp per pound of gain. On this basis it required 4.43 lbs. of pulp to
replace .46 lbs, of the basal ration. Considerable wastage of the avocado was
noted. Much of the unconsumed material was peel. However, the actual feeding
value of the pulp was undoubtedly some greater than these figures indicate.
TABLE 1. AVOCADOS FOR GROWING-FATTENIMG PIGS
No. of pigs
Ave. initial wti., lbs.
Ave. final vt., Ibs.
Ave. daily gain, Ibs.
Ave. daily feed consumption, lbs.
Feed per Ib. gain, Ibs.
Ave. no days on experiment
The two pigs which were fed avocado pulp only were unable to maintain their
body weight over a period of 12 days, indicating the inadequacy of the material
as the sole feed.
The pig offered avocado seed only refused to eat them for a period of one
week even though no other feed was available. After this period of time the test
Fresh avocado pulp (halved and seeds removed) was offered ad libitum to
growing-fattening pigs in drylot. The pigs also had a well-balanced basal ration
at their disposal.
Good gains were recorded in both the control lot and the lot receiving the
avocados. It required 9.64 Ibs. of the avocado pulp to replace one pound of the
basal ration. The pigs liked the pulp very well and consumed an average of 7.15
lbs. (wastage included) per head per day in addition to 2.48 Ibs. of the basal
Avocado pulp alone was an inadequate feed and avocado seed was extremely
unpalatable to the pig.
These preliminary results indicate that the avocado has limited feeding
value for the growing-fattening pig. If a method can be developed for processing
the pulp into a dry concentrated feed then it could probably serve as a useful
ingredient in mixed swine rations.