Lactation response of cross bred dairy cows fed on indigenously prepared rumen protected fat - a field trial.

摘要: A field trial was conducted to study the effect of supplementation an indigenously prepared rumen protected fat (PF) on lactation response in crossbred dairy cows. High yielding multiparous (2nd 3rd lactation) cows (15) were randomly divided into 3 groups 5 animals each, based parity, date parturition and previous milk yield. During early i.e. up 90 days post partum period, offered 6.5 kg CM1, 25 green berseem 2 wheat straw (WS) daily. mid from 150 feeding schedule CM2, 35 maize 1 WS Besides, supplemented without (control) or with 200 g RBO (RBO200) PF (PF200) equivalent basis. The CP EE contents total ration during (TMR1) (TMR2) 16.2 3.5% , 14.1 3.5%, respectively. In treatment groups, due supplemental fat, content TMR1 TMR2 5.2% 5.0%, There consistently higher yield (MY) 4% corrected (FCMY) PF200 group over control RBO200 throughout period. lactation, MY increased 3.2 kg/day (19.6%) FCMY 2.8 (22.3%) group. However, had no beneficial composition (fat, SNF, protein lactose) remained similar among but SNF control. urea nitrogen (MUN)% normal range. although than group, it could not pass statistical test FCMY. both composition. MUN% also initial, final changes body weight (BW) condition score (BCS) (P>0.05) groups. initial fall BW BCS all followed by gradual recovery after peak yield, however, better Also, comparable number artificial inseminations required per conception (1.2) lower (1.4), indicating reproductive performance. Due PF, there net profit Rs 34.50/cow/day lactation. It concluded that daily (Ca-LCFA) (3.2 kg/day; 19.6%) (2.8 kg/d; 22.3%) improved performance cross bred significant