Bulgarian Journal of Agricultural Science
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Study of changes in total proteins, hemoglobin, oxygen capacity (O2CT) and total carbon dioxide (TCO2) in cows of different motor activity and physiological condition
Hristo Hristev, Rumyana Ivanova, Zhivka Gergovska
Abstract: The purpose of this study is to monitor changes in total protein, hemoglobin and oxygen capacity (O2CT), and total carbon dioxide (TCO2) levels in free-range cows during their dry period and depending on the degree of their phisical activity, and physiological state. The study was conducted with three groups of cows from the breed Bulgarian Black and White cattle. Animals from the control group were kept free-ranged in indoor building sand were fed inside the building. They were also given access to a yard for a walk. Animals from the first experimental group were grown in the same way with an additional daily 2 km walk, and those from the second experimental group - under the same conditions with an additional daily walk of 4 km. All groups were grown in the same building. Blood samples were taken in dynamics form 5 cows from each group: - on their dry period, 7-5 days before calving and 5-7 days after calving. Blood samples were taken from the same animals during the different periods. It was found that the total protein increased with pregnancy and it slightly decreased before birth. Excessive physical exercise (over 4 km) kept the protein synthesis. Hemoglobinleves also increased with pregnancy until the time of delivery, and then slightly decreased. Moderate physical exercise (up to 2 km) stimulated hematopoiesis. The level of total carbon dioxide in the blood remains in its physiological range regardless of the physiological state of the cows and their physical exercise. Oxygen capacity of the blood in animals with moderate exercise is increased with pregnancy and postpartum.
Keywords: cows; hemoglobin; oxygen capacity; physical activity; total CO2; total protein
Date published: 2019-09-05
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