Experiment Station Record, Volume 92, January-June, 1945 Page: 96
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96 EXPERIMENT STATION RECORD (Vol. 92
and feed efficiency were used to measure the nutritive values of the various rations.
In one experiment with 3 lots of 15 chicks each fed in duplicate with ground yellow
corn, the small quantities of meat meal, fish meal, soybean meal, and dry skim milk
of the basal ration were replaced by about 45 percent of corn oil meal with and
without riboflavin. Both chicks and rats fed unsupplemented corn oil meal rations
grew at a slower rate than controls. The chicks on the control rations gained an
average of 516 gm. as compared with 81 and 92 gm. with corn oil meal and corn
oil meal with riboflavin, respectively. Rats on these rations gained an average of
195, 100, and 109 gm., respectively. The average gains of lots of 15 chicks fed in
duplicate were with 16 percent protein from the standard mixture 630 gm., 16 from
corn oil meal 235 gm., 15 from the standard mixture 590 gm., 15 from corn oil meal
317 gm., 13 from the standard mixture 453 gm., 13 from corn oil meal 314 gm., 11
from the standard mixture 424 gm., 11 from corn oil meal 270 gm., and with 8 percent
protein from cereals 145 gm. As corn oil meal was suspected to be deficient in
certain amino acids, the rations of certain chicks were supplemented with them.
The addition of cystine and lysine to a corn oil meal ration produced a rate of growth
significantly greater than the unsupplemented ration. Additions of glycine and
glutamic acid produced gains just below the point of significance. The gain was not
increased significantly with histidine, tryptophan, and arginine added to the corn
oil meal ration.
In eight paired experiments with 1- to 3-week-old cockerels, a variance analysis
showed a highly significant difference in the rate of body gain over a 13-day period
when the corn oil meal ration was supplemented with cystine, a significant difference
when lysine and glutamic acid were added, and no significant difference when
glycine was added. In studies of the supplemental value of five different protein
feeds for corn oil meal with lots of 20 chicks fed in duplicate pilchard fish meal
as 5 percent and corn oil meal as 19 percent produced gains of 1.57 gm. per gram
of protein consumed. Dry skim milk and gelatin, 9 and 3.5 percent, respectively.
with 22 percent corn oil meal produced gains of 1.27 and 1.48 gm. per gram of
protein consumed. Cottonseed meal and blood meal proved to be of little value,
and the birds receiving them suffered high mortality. In another experiment in
which lots of day-old chicks were fed proteins from yeast and corn oil meal in
different proportions and growth after 2 weeks was compared by methods of Heiman,
Carver, and Cook (E. S.'R., 82, p. 377), lots receiving yeast as the sole protein
supplement utilized feed most efficiently, but a covariance test revealed that after
the gains were adjusted to a common feed intake basis they did not differ significantly.
In three further trials with 10 chicks per lot at 15 and 16 percent protein
levels there were greater gains and more feed consumed on mixtures of sodium
sulfide-treated feathers and corn oil meal than on either alone, and the mortality was
generally reduced. However, in one experiment the feathers treated with sulfide
proved toxic. Autoclaving for 2, 4, 6, and 8 hr. seemed to have little or no beneficial
effect on the sulfide-treated feathers' fed to lots of 20 chicks. Similar results were
shown with chicks and rats on the supplemental value of the sulfide-treated feathers
to corn oil meal.
The composition and nutritive value of seeds hays, W. S. FERGUSON and S. J.
WATSON (Jour. Agr. Sci. [England], 34 (1944), No. 2, pp. 88-92).- The crude
protein content of 108 samples of first-year seedings of hay varied from 5 to 13.5
percent, averaging 9 percent. Hay cut in the second and third year showed that the
protein content falls and the crude fiber rises with increasing age. In twenty-firstyear
hays the starch equivalent values were high and moderately constant, averaging
36.8, with protein equivalent values averaging 5.1' percent. Other samples of hays
were also investigated for composition and digestibility.
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/109/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.