The Relationships between the Color of the Nose Area with Milk Yield, Physiological and Blood Paremeters of Holstein Cows in Hot and Humid Conditions
Abstract: The objective of this research was to investigate the correlation between the color of the nasal region and the milk yield, physiological responses, and hematological parameters in Holstein cows under hot and humid conditions. Data were gathered during morning, noon, and evening periods in July, with an average temperature-humidity index of 82 units. Cows with a white nasal region exhibited lower respiration rates breaths per minute during the morning 67.27, 81.53 compared to those with a black nasal region, but higher rates during the noon 96.13, 95.13 and evening 99.33, 98.53 periods. The difference in morning respiration rates between cows with black and white nasal regions was statistically significant p 0.05. However, the average weekly milk yield kg during the trial period was significantly higher p 0.05. The study concluded that the average daily milk yield during summer was 21.18?3.68 kg in cows with a white nasal region and 15.02?2.93 kg in cows with a black nasal region, indicating that cows with a white nasal region produced an average of 6 kg more milk per day. Furthermore, physiological data suggested that cows with a white nasal region were better equipped to cope with daytime heat stress during the cooler night hours, which was also reflected in their hematological values.
Keywords: Nose Area Color, Milk Yield, Blood Metabolites, THI
How to Cite?: Ozgul ANITAS, Serap GONCU, "The Relationships between the Color of the Nose Area with Milk Yield, Physiological and Blood Paremeters of Holstein Cows in Hot and Humid Conditions", Volume 12 Issue 7, July 2023, International Journal of Science and Research (IJSR), Pages: 1835-1841, https://www.ijsr.net/getabstract.php?paperid=SR23726135728, DOI: https://dx.doi.org/10.21275/SR23726135728