Physiological responses, milk yield, composition and blood metabolites of HF Cross cows

This dataset includes raw data on physiological responses, milk yield and composition, and blood metabolites of 50 lactating Holstein Friesian (HF) crossbred cows studied from January to December 2024 at the Central Cattle Breeding and Dairy Farm, Savar, Bangladesh. Cows from five genetic groups (0%, 50%, 62.5%, 75%, and 87.5% HF) were evaluated under three THI conditions: ≤75, 75–80, and ≥80. Data were collected repeatedly for each cow within every THI phase. Physiological parameters were recorded twice daily during each milk and blood sampling date, and the average of the two readings was used for analysis. Milk and blood samples were collected five times per THI category, resulting in a total of 750 milk and 750 blood samples. This dataset provides insights into how genotype and heat stress affect productivity, physiological responses, and metabolic adaptation in tropical dairy cattle.