Report on the Agricultural Experiment Stations, 1953 Page: 8
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8 REPORT ON EXPERIMENT STATIONS) 1953
to meet the vitamin A needs of cattle during about 8 months of the
year. Sorghum fodder, an important winter roughage in this area,
was also low in carotene compared with good quality prairie or
legume hay. The addition of 2 pounds of good quality alfalfa hay
daily to a ration of sorghum fodder and soybean meal, fed to pregnant
cows during the wintering period, resulted in a shorter breeding period.
The cows weaned a higher percentage of calves at heavier
weights than cows on an unsupplemented ration. In these studies
alfalfa gave better results than fish-liver oil of equivalent vitamin A
potency, as measured by blood carotene and vitamin A levels, weight
gains, and general appearance of the cows. A supplement of dehydrated
alfalfa meal also improved performance of calves on either
a high or low protein supplement, resulting in higher winter gains
and increased weight as yearlings.
In some of the very fertile peat and muck soils forage may contain
from 5 to 150 parts per million of molybdenum. Even with abundant
feed, cattle on muck pastures scour, lose weight, develop an anemia,
and die unless remedial measures are taken. Research at the Florida
station has shown that application of copper fertilizers alone will
not rectify the difficulty, because of the inability of the plants to take
up sufficient copper to counteract the effects of molybdenum. Excellent
beef production records have been attained when, in addition
to the application of copper fertilizers, mineral mixtures high in
copper have been made available to the cattle. Drenching with a
solution of copper sulfate has been successfully used as a therapeutic
Preliminary results in experiments currently being conducted by
the Oklahoma station suggest that a high intake, of manganese may
reduce the ability of beef cattle to assimilate phosphorus from their
ration, as indicated by blood phosphorus levels and weight of cows.
In previous studies phosphorus supplementation resulted in satisfactory
weight gains of heifers but failed to entirely correct the low
percentage of calf crop and low weaning weight of calves.
Anaplasmosis is a serious infectious and transmissible disease of
cattle commonly found in the southern portion of the United States
and occurs sporadically, though not infrequently, in other parts of
the country. Originally the disease was considered to be a part of the
tick fever (piroplasmosis) complex, but since 1910 it has been known
as a specific disease entity caused by a minute parasite which invades
the red blood cells and destroys a large number of them, so that the
blood becomes pale and watery. Formerly it was thought to be transmitted,
like tick fever, exclusively by the cattle fever tick, Boophilus
Even after it was known to be a specific disease, separate and distinct
from tick fever, it was thought that eradication of the fever
tick would eliminate both tick fever and anaplasmosis. Unfortunately
this expectation was not realized. Tick fever disappeared with
eradication of the fever tick, but anaplamosis remained and spread
into areas never included in the original tick quarantine area. It
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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/m1/10/: accessed June 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.