Milk yield and composition and efficiency of nutrients for milk production in Jaffrabadi buffaloes on rations supplemented with varying levels of bypass fat.

Negative energy balance in early lactation can be counterbalanced by supplementing bypass fat in lactating animals. An experiment was conducted to evaluate the effects of supplementing daily rations with 0, 10, 20 and 30 g bypass fat/ kg milk production in 24 lactating Jaffrabadi (1-4 lactations 425-727 kg B.Wt.) buffaloes in four groups of six each in CRD. All the experimental buffaloes were offered bypass fat 150 g/day/animal 15 days prior to prepartum to nullify negative energy problem in early lactation. Milk and FCM production was not affected signifi cantly(p>0.05) due to bypass fat supplementation, though 10 g/ kg milk supplementation resulted in 22.70% and 18.93% more milk and 28.21% and 20.51% more FCM, respectively, than control group. There was signifi cant (p<0.05) and linear increase in milk fat percent and total solids percent in bypass supplemented group of buffaloes. Milk SNF, Protein and Ash percent were not infl uenced by the level of supplementation signifi cantly. Total solids percent increased by 2.26, 5.73 and 4.93%, respectively in supplemented groups compared to control. This assumes signifi cance due to the fact that buffalo milk is used for Khoa making. Though the nutrients effi ciency for milk production was non signifi cant among experimental groups, 10 g/kg milk supplemented group of buffaloes exhibited positive effect in infl uencing lower DMI, CPI, DCPI and TDNI per kg milk production. Overall results indicated higher level of bypass supplementation has no benefi cial effect and prepartum supplementation of bypass fat tends to counter balance negative energy in early lactation.