Experiment Station Record, Volume 92, January-June, 1945 Page: 102
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102 EXPERIMENT STATION RECORD [Vl. 92
The gains on the soybean proteins were equal to or only slightly less than those
produced in previous studies with dried skim milk or fish meal. Soybean rations
were more efficient than corn gluten rations'. Daily records were kept of feed and
water consumption and the feces produced, with analyses at the conclusion of the
experiment of the contents of the alimentary tract, especially the gizzard.
The utilization of the sulfur amino acids by the chick, C. R. GRAU and H. J.
ALMQUIST. (Univ. Calif.). (Jour. Nutr., 26 (1943), No. 6, pp. 631-640, illus.
1).-A basal ration in which the only protein source was soybean protein did not
support a good rate of growth in chicks unless methionine was added. Autoclaving
the soybean protein for 1 hr. at 15 lb. pressure did not improve growth.
The chicks were depleted of choline for 16-21 days after hatching and divided into
23 groups of 3 or 4 each on a basal ration of soybean protein 23 percent, glucose
52.8, cellulose 5, calcium gluconate 8, cottonseed oil 5 percent, and minerals and
vitamins. Supplements of l-cystine, dl-homocystine, dl-methionine, choline chloride,
S-methylcysteine, and l-methionine were given separately or together to groups of
chicks for 6 days, and the percent gain in weight per day was ascertained. Evidently
the choline-depleted chicks could not utilize homocystine in place of methionine,
but homocystine could replace cystine in the choline-depleted chicks. dl-Methionine
was equivalent to l-methionine for growth, whether or not choline was present in
the diet. S-methylcysteine neither assisted in the utilization of homocystine nor
replaced cystine in the ration of the chick.
Methionine deficiency of Alaska field peas for chick growth, C. F. PETERSEN,
C. E. LAMPMAN, D. W. BOLIN, and O. E. STAMBERG. (Idaho Expt. Sta.). (Poultry
Sci., 23 (1944), No. 4, pp. 287-293).-Carrying forward the work of Woods
et al. noted on page 140, in which Alaska field peas were found to be relatively complete
for the rat in known essential amino acids except methionine, similar results
were found with the chick. In three trials', weights of Single-Comb White Leghorn
cockerels per lot were compared at 7, 10, 14, 18, and 21 days on 12 percent protein
from peas with and without 0.5 percent methionine in the first trial. Subsequent
trials were based on rations containing 6, 12, and 18 percent pea protein with and
without 0.25-0.75 percent methionine. Comparisons were made of the gains produced
by additions of 0.4 percent cystine alone or in addition to the methionine. In
the main, the lots were fed in duplicate.
The weights at 21 days with 12 percent pea protein alone or with 0.4 percent cystine
were less than 85 gm. The weights with 0.5 percent methionine were about
148 gm., with no improvement for additions of cystine. The average gain on the
18-percent pea-protein ration was 22.5 gm. as compared with 89.9 gm. on the 18
percent pea protein plus 0.5 percent methionine and 0.4 percent cystine. This gain
per gram of protein consumed was practically equivalent to the 18-percent control
lot. There was a more efficient utilization of the protein at the 12-percent than at
the 18-percent level. With the varying amounts of methionine the proteins of peas
were more efficiently utilized than the proteins of a control ration consisting of
herring fish meal, meat meal, and dried milk.
Corn, wheat, and barley for chickens, W. O. WILSON (South Dakota Sta. Bul.
376 (1944), pp. 16, illus. 6).-In a series of experiments conducted from 1936 to
1943, corn, wheat, and barley were found to be about equal value for poultry for
starting, growing, and laying rations. Measurements of carcass quality employed in
previous studies (E. S. R., 84, p. 802) were primarily concerned with the fat thickness.
Mashes should be fortified with vitamins and minerals, although a 20-percent
protein mash with wheat has resulted in a vitamin A deficiency. Differences in egg
production were not significant when tested statistically. Hens on these grains and
mash were able to balance protein intake of 20-26 percent in mash to about 16.5
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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/m1/115/: accessed March 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.