COMFORT ZONE FOR MAXIMUM MILK PRODUCTION IN CROSSBRED CATTLE AT LEH (LADAKH)

摘要

Data from 1980 to 1989 was analysed to identify comfort zone for maximum milk production in Holstein Friesian X Sahiwal crossbreds at high altitude cold desert of Ladakh. Year, month and genetic group had significant effect on milk yield/cow/day. Regression of milk yield/cow/day on monthly maximum and minimum temperatures was not significant. Milk yield/cow/day was higher from April to September. The comfort zone for maximum milk production in crossbreds at Leh (Ladakh) was between 0.2°C and 27.7°C.