Vol. 11, Special Issue 7 (2022)

Author(s):
Abhishek Kain, Sunil Arora and Nalini Kataria

Abstract:
The Temperature-Humidity-Index (THI) has been developed as a marker of the ambient heat load placed on cattle. Animals from arid tracts commonly have combined effects of environmental changes incorporating ambient temperature and relative humidity. The THI is considered to be an excellent indicator of variations in physiological acidification parameters viz. plasma and urine bicarbonates and plasma and urine anion gap. The values of THI among ambiences varied significantly (p≤0.05) and humid-hot displayed maximum value. An interpretation was drawn from the data observation of THI that humid-hot ambience produced severe impact on the animals as compared to dry-hot ambience. Maximum levels of plasma and urine bicarbonate was observed during humid-hot ambiences. During humid-hot, the per cent variation in the value of plasma bicarbonate and urine bicarbonate were found to be maximum (+15.85) and (+85.95), respectively. According to the observations of research, in group A plasma bicarbonate and urine bicarbonate values were found significantly (p≤0.05) higher in pregnant dry cows than non- pregnant milch and pregnant milch cows. In group B, those values were significantly (p≤0.05) higher in multipara cows than the respective mean value of primipara cows.