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

Abstract

Feeding trial of 4 months was conducted on 24 crossbred cattle, which were subjected to treatment T0 (control), T1 (protected protein), T2 (protected fat) and T3 (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 T0 and T2 groups, untreated groundnut cake was given in ration whereas, in T1 and T3 groups, groundnut cake was treated with formaldehyde (FA) @ 1.0 g FA /100g CP. Also bypass fat (99%) was supplemented in T2 and T3 groups @ 10 g/ liter milk production. The DMI was significantly higher in T3 followed by T1 , T0 and T2 . 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 T3 followed by T2, T1 and T0. However, DCPI and TDNI /100 kg body weight did not differ among all groups. The average milk production was 16.49% higher in T1, 13.93% higher in T2 and 20.99% in T3 over T0. 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.

Keywords

• Blood metabolites
• Milk production
• Protected fat
• Protected protein
• Reproduction