effect of milk urea nitrogen of dairy cows in relation to breed

milk urea nitrogen (mun) of dairy cows was determined in relation to breed. a total of forty (40) pabna and red chittagong dairy cattle each of twenty (20) were selected to know the milk composition, nutritional status and milk urea nitrogen. live weight of pabna cattle (187±14 kg) was higher than that of red chittagong cattle (174±4 kg). in pabna cattle milk yield (4.94 kg), minerals (0.15%) and lactose (5.38%) is more than red chittagong cattle milk yield (3.62 kg), minerals (0.12%) and lactose (5.37%) but fat (5.04%), protein (3.7%) and solid not fat (snf) content (9.92%) was more in red chittagong cattle than pabna cattle fat (4.03%), protein (3.64%) and snf (9.87%). the metabolic energy 74.93 mj/day, dry matter 9.47 kg, crude protein 0.84 kg , ash 1.24 kg, crude fiber 2.18 kg and true digestible nutrient 5.43 kg was required for pabna cattle and in red chittagong cattle metabolic energy 72.60 mj/day, dry matter 9.14 kg, crude protein 0.660kg , ash 1.16 kg, crude fiber 1.93 kg and true digestible nutrient 5.19 kg was required. milk urea nitrogen (mun) concentration was higher under in pabna cattle (38.15 mg/dl) than red chittagong cattle (rcc) (29.30 mg/dl). milk urea nitrogen (mun) differ pabna cows and red chittagong cows.