Effect of protected protein and protected fat on production, reproduction performance and blood metabolites in crossbred cattle

Feeding trial of 4 months was conducted on 24 crossbred cattle, which were subjected to treatment To (control), T-1 (protected protein), T-2 (protected fat) and T-3 (protected protein and fat). Crossbred cows in second to fourth lactation with most probable production ability (MPPA) of average 2,300 litre milk production per lactation for each group were selected. All animals were fed with 2/3 DM through roughages (2/3 from dry and 1/3 from green) + 1/3 DM from concentrate mixture. In T-0 and T-2 groups, untreated groundnut cake was given in ration whereas, in T-1 and T-3 groups, groundnut cake was treated with formaldehyde (FA) @ 1.0 g FA /100g CP. Also bypass fat (99%) was supplemented in T-2 and T-3 groups @ 10 g/ liter milk production. The DMI was significantly higher in T-3 followed by T-1, T-0 and T-2. However, the DMI/100 kg body weight was nonsignificant among all treatment. The average digestible crude protein intake (DCPI) and total digestible nutrient intake (TDN) was significantly higher in T-3 followed by T-2, T-1 and T-0. However, DCPI and TDNI /100 kg body weight did not differ among all groups. The average milk production was 16.49% higher in T-1, 13.93% higher in T-2 and 20.99% in T-3 over T-0. Similar trend was observed in 4% FCM and ECM yield in all treatment groups. Reproductive performance of animal was significantly improved by feeding protected fat groups. By supplementation of protected fat, blood cholesterol and triglycerides level were significantly increased and BUN level decreased significantly by feeding protected protein.