Vol. 9, Special Issue 1 (2024)

Author(s): Munesh Kumar Pushp and Surendar Singh Nirwan

Abstract: The objective of the research was to determine how bypass fat affected the blood's biochemical profile, particularly the levels of calcium and phosphorus, and milk production levels. 40 advanced pregnant crossbred dairy cows with 2^nd to 5^th parity were randomly divided into two groups; control group (n=10) and treatment group (n=30). The regular feeding schedule for the control animals was followed regularly. For approximately two weeks prior to the expected date of calving and a week more after that following calving, the treatment animals were given daily oral supplements in addition to their regular diet containing an additional 100 g of bypass fat (Enerfat, Kemin). After that, the amount of bypass fat was increased in accordance with milk production, starting at 10 grams per liter of milk produced and continuing for 60 days postpartum, with a daily maximum of 250 grams.Two weeks prior to the expected date of calving (-14), blood samples were collected from each animal on days 0, 10, 20, and 30 of calving, for the estimation of the levels of calcium and phosphorus. The experimental animals' average milk production was recorded every two weeks up to 60 days during lactation. Supplementing with bypass fat did not impact the average milk production. According to the study's findings, supplementing with bypass fat had no positive effects on milk production. Over the following postpartum days, there was an unchanged but non-significant increase in the mean serum levels of calcium and phosphorus.