ABSTRACT
The present study was performed to evaluate haematological and biochemical parameters with response to milk production of dairy cattle at low temperature. Ambient temperature and relative humidity were recorded and the temperature-humidity index (THI) was calculated as indicator of thermal comfort zone for cattle. Lactating crossbred dairy cattle were selected for this study. A significant increase in RBC, Hb, and PCVWBC was recorded in winter. Glucose and aspartate aminotransferase (AST), albumin level showed a significant increase in winter. Milk production level was decrease due to cold stress. These results provided an insight into the haematological and biochemical responses of Jersey crossbred cows to different environmental conditions. Hence, this study will be helpful for the better dairy cattle management in winter seasons for higher production at the cold arid high altitude region
ABSTRACT
The present study was done to see the effect of heat stress on blood parameters in dairy cattle. Dairy cows of similar physiological status were selected. Blood samples were collected and analyzed based on the temperature-humidity index (THI). Blood samples were collected and analyzed for packed cell volume PCV(%), red blood cell count RBC count, white blood cell count (WBC) and hemoglobin (Hb). Significant rise in physiological parameters such as respiration rate (RR), pulse rate, was observed. Hematobiochemical parameters such as red blood cell count (RBC), (WBC), (PCV%), (Hb), Cholesterol, creatinine, ALT, AST, Cortisol and BUN were increased. From the present study it can be concluded that THI is a sensitive indicator of heat stress.