Effect of physiological and dietary nutritional conditions on serum biochemicals in hanwoo cows Park B.K., Ahn J.S.1, Kim M.J.2, Son G.H., Shin J.S.* College of Animal Life Sciences, Kangwon National UniversityChuncheon-24341, South Korea 1Hanwoo Research Institute, National Institute of Animal Science, RDA, Pyeongchang-25340, South Korea 2Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Aoba, Sendai-9808572, Japan *Corresponding author: jsshin@kangwon.ac.kr
Online Published on 28 November, 2022. Abstract Park, B.K., Ahn, J.S., Kim, M.J., Son, G.H. and Shin, J.S. 2022. Effect of physiological and dietary nutritional conditions on serum biochemicals in hanwoo cows. Animal Nutrition and Feed Technology, 22: 653–663. This study was conducted to investigate the effect of physiological and dietary nutritional conditions on serum biochemicals in Hanwoo cows. A total of 458 Hanwoo cows were used as experimental animals. The study was carried out under four conditions: parity (Heifer, Parity 1, Parity 2, Parity 3, and > Parity 4) for 1 month, feeding type (concentrate feed + rice straw and total mixed ration [TMR]) for 3 months, dietary energy level (80%, 100%, and 120%) for 3 months, and pregnancy (pregnant and non-pregnant) for 1 months. The concentration of serum glucose was higher in the concentrate feed group than in the TMR group (P<0.01). Concentration of non-esterified fatty acids (NEFA, P<0.03) and blood urea nitrogen (BUN, P<0.01) increased in the TMR group compared to the concentrate feed group. Serum glucose concentration decreased at finishing period (3rd month) with increasing feed energy level (P<0.05); however, serum BUN (P<0.03) and cholesterol (P<0.02) concentration increased with increasing energy level. The effect of pregnancy on the overall serum chemicals was not significant. As a result of this study, feeding type and dietary energy level significantly influenced serum glucose, NEFA, BUN, and cholesterol concentration in Hanwoo cows, whereas, parity or pregnancy had no influence. Therefore, the levels of glucose, NEFA, BUN, and cholesterol in serum can be used as important indicators to evaluate the nutritional status of cows. Top Keywords Energy level, Feeding type, Hanwoo cows, Parity, Pregnancy. Top |