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Abstract
The experiment was conducted to study the effect of feeding urea molasses block on the productive and reproductive performance of Black Bengal Doe. In the present experiment, twelve does were blocked according to live weight and the blocked groups were assigned to four groups having 3 replications into each. Among these four groups, one group was assigned to control feeding (6 hours grazing) and another three groups were assigned to UMB feeding. These 3 treatments (Ti, T2, & T3) were 50 g, 100 g and 150 g UMB with 6 hours grazing respectively. Live weight of individual doe was recorded fortnightly and live weight of individual kid was recorded weekly to study their growth rate. Average initial live weight, live weight at first kidding and final live weight of To, T1, T2, and T3 were 11.63, 15.4 and 13.0 kg; 11.6, 15.9 and 14.4 kg; 11.6, 16.2 and 15.3 kg and 11.6, 15.6 and 14.3 kg respectively but the final weight differed significantly (p<0.05) among the treatment groups.. The average live weight gain of kid for treatments To, T1, T2, and T3 were 53.22, 67.51, 84.31 and 74.79 g/d respectively. Daily live weight gain was significantly (p<0.01) higher in UMB supplemented groups than control group. Milk yield also significantly (p<0.01) differed between the control and UMB supplemented group which valued 190, 224, 275 and 225 ml/day for To, T1, T2, and T3 treatments respectively. The average post partum heat period of treatments To, T1, T2, and T3 were 110, 88.6, 50.0 and 61.6 days respectively, which differed significantly (p<0.01). Cost benefit ratio estimated was 1:2.00, 1:2.50, 1:2.66 and 1:2.12 for the aforesaid treatments respectively. In conclusion, among 4 treatments overall performances of 100 g UMB/d fed goats were more satisfactory than others.