Body mass index at calving on performance and efficiency of Zebu cow herds

This study examines the impact of body mass index (BMI) at calving on development and postpartum efficiency cows Zebu origin. The involved 87 their calves [pure Nellore (N) or predominant composition in a cross with Charolais (C) (3/4N1/4C 5/8N3/8C)]. mothers were grouped into classes according to BMI calving, namely, ‘small’, ‘moderate’ ‘large’. Body was determined by dividing weight length hip height then result 10. Cows weighed weaning, end breeding period diagnosis pregnancy. Calves birth, early weaning (63 days) 210 age. To evaluate milk yield quality, collected 21, 42 63 days after calving. Milk measured direct method, manual milking, followed analysis lactose, fat, total solids crude protein contents. Pregnancy rate similar between three groups; however, lower more efficient producing kilograms calf per kilogram cow kept. Higher provide higher yields, without affecting its as well heavier