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Florida Agricultural Experiment Station,3 Gainesville
Abstract
Plasma, erythrocyte, and total blood volumes calculated on a body weight basis were determined for 24 Hereford and 24 Brahman cattle. Half of the animals received a nutrient allowance recommended by the National Research Council, while the remainder received a similar allowance less 50% of crude protein. Half of each breed group were 2-year-old virgin heifers and half were 4-year-old cows. Brahmans had a significantly (P<.01) higher plasma, erythrocyte, and whole blood volume than Herefords. Four-year-old cows in each breed had larger (P<.01) volumes of plasma, erythrocytes and whole blood than 2-year-old heifers. There were no significant differences due to diet or season.
1 Florida Agricultural Experiment Station, Journal Series No. 1446.
2 Present address: Auburn University, Auburn, Alabama.
3 Department of Animal Science.
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