Effects of Trace Minerals, Aureomycin, and other Supplements on Certain Hematologic Values and Organ Weights of Dairy Calves
Year: 1957
Type: article
Abstract: The purpose of this work was to determine if certain blood criteria of calves on various rations could be associated with growth.Twenty-seven newborn calves were placed in three groups.Group I was fed the basal ration; Group II, basal plus trace minerals iron, copper, cobalt, zinc, manganese, and iodine, and Group III, basal plus trace minerals, major minerals, vitamins, and chlortetracycline.Trace minerals in Group II and trace and major minerals, vitamins, and chlortetracycline in Group III produced hematopoietic responses in erythrocytes, hemoglobin, and hematocrit which were evident from 2 wk.until the calves were 8 wk.old.Growth was stimulated.The size of the erythrocyte, the amount and concentration of hemoglobin in the cell, and the total leukocyte count were not affected by ration.Soon after birth some calves with high leukocyte counts contracted diarrhea and then pneumonia, but effective treatment was found.Editor.In a recent publication (9), the effects of trace minerals, chlortetracycline, s and other dietary constituents on growth and feed consumption of dairy calves were reported.It was found that newborn calves fed dietary trace minerals grew at a significantly faster rate than controls during the first 7 wk., but it was not until the 8th wk. that the spread in average size between the groups was statistically significant.From 8 to 24 wk., calves supplemented with trace minerals continued to average larger than the controls but, comparatively, there was a gradually diminishing growth rate of the calves supplemented with trace minerals.A third group of calves, fed trace minerals, major minerals, water-soluble and fat-soluble vitamins, and chlortetracyeline, grew for 8 wk. at a rate similar to those fed trace minerals, but from 8 to 24 wk.this third group grew significantly faster than either the trace mineral-supplemented group or the controls, and were considerably larger at 24 wk.than those in either of the two other groups.The differences in the quantity of feed consumed and efficiency of gain among the three groups were not significant.The purpose of this experiment was to determine whether certain food components of the calves in the various groups could be associated with differences in growth response. :MATERIALS AND METI~IODSTwenty-seven newborn Ayrshire and Holstein calves were assigned at random, after grouping by sex, to three rations.Three Ayrshire females, two Ayrshire
Source: Journal of Dairy Science
Institution: Kansas State University
Language: English
Subfield: Agronomy and Crop Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2111246700