Indian Journal of Animal Research

A study was undertaken to evaluate the economics of feeding protected protein and protected fat in crossbred cows. The feeding trial of4 months duration was conducted on 24 crossbred cattle which were subjected to treatment T₀(Control), T₁(Protected protein), T₂(Protected fat) and T₃(Protected proteinand fat)_.Crossbred cows in second to fourth lactation with mostprobable production ability (MPPA) of average 2300 liter 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 gm FA/100g CP). Also bypass fat (99%) was supplemented in T₂ and T₃ groups @ 10 gm per liter milk production. Daily DM intake and daily milk yield for individual animals were recorded. The data generated during experimental period were analyzed by Factorial Randomized Block Design (FRBD) with SAS, 9.3 versions. The DMI was significantly(P<0.05) higher in T₃ (12.72) followed by T₁ (12.59), T₀ (12.47) and T₂ (12.23). However, the DMI/100 kg bodyweight was 3.05, 3.01, 3.13 and 2.81 kg/d in T₀, T₁, T₂ and T₃, respectivelywith non significant treatment. The average milk production during supplementation period was 9.82, 11.76, 11.41 and 12.43 kg/d in group T₀, T₁, T₂ and T₃, respectively which was significantly 16.49% higher in T₁, 13.93% higher in T₂ and 20.99% in T₃ over T_0. The net return over feed cost was highest in T₃ group followed by T₁ and T₂ over T₀