Report on the Agricultural Experiment Stations, 1953 Page: 55
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POULTRY RESEARCH 55
gains in body weight from less feed than standard rations. The net
cost of producing a dozen eggs is considerably less. In the new
ration, yellow corn and 20 grams of niacin per ton replace the ground
oats and one-half of the standard wheat middlings previously used.
Official tests have shown this new ration to be especially good for use
in laying pens equipped with automatic feeders. Litter in pens using
this high corn feed is drier than in pens fed standard rations, which
indicates that the birds fed the corn ration secrete less water. The
new feed is slightly more expensive per ton than the standard ration.
However, this small extra cost is more than offset by the efficiency of
the high energy ration.
Wood waste for poultry
A waste product from Wisconsin's large paper industry may prove
to be a valuable poultry feed, according to the Wisconsin station.
The product, called torula yeast, is produced from the liquid drawn
off after wood pulp is treated with sulfite. The yeast contains about
45 percent protein and some valuable vitamins and unidentified
factors. An all-vegetable ration with 20 percent torula yeast replacing
a part of the soybean oil meal produces good growth in poultry.
Untreated sulfite wastes are one cause of pollution in our lakes and
streams. The yeast treatment of this waste may give the poultry
industry a valuable new protein feed to meet some of the increasing
shortages of feed protein.
Research on Egg Quality
Nutritional loss in storage
Interior quality of shell eggs changes during storage of the eggs.
Certain chemical changes also occur, such as a transfer of water and
some nutrients between the yolk and the white. The Michigan station
has found that eggs stored for 12 months decrease in niacin, pyridoxine,
riboflavin, pantothenic acid, and pteroylglutamic acid (folic
acid) content, but not in either choline or biotin. Eggs lost 16 percent
of their folio acid during 6 months of cold storage and 27 percent
during 12 months of cold storage.
Preserving quality with CO2
The Minnesota station has tested the value and practicability of
using CO2 (carbon dioxide) as an aid in preserving the quality of
cartoned eggs as they pass through normal market channels. A comparison
was made of oiled eggs, eggs over-wrapped snugly in a plastictype
bag on the outside of each carton, and eggs in a plastic bag with
a pellet of solid CO2 included. The use of the moisture-vapor-proof
carton without added CO, was about as efficient as oiling in preserving
quality, particularly when the eggs were packaged within 24 hours
after laying. The advantage of adding CO2 became greater as the
interval between laying and packaging increased. This can probably
be explained on the basis that fresh eggs liberate excess CO2. If this
escaping gas can be trapped within the package so that an equilibrium
is reached in a short time, the albumen can be stabilized. In commnercial
practice, however, the time lapse between laying and cartoning is
sufficiently great to allow the escape of considerable CO2.
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United States. Office of Experiment Stations. Report on the Agricultural Experiment Stations, 1953, book, 1953; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5989/m1/57/: accessed March 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.