Abstract
Eighteen lactating Nili-Ravi buffaloes of same lactation stage were divided into three groups with equal number of buffaloes in each group to study the effect of different NPN sources on milk production and milk composition. Isonitrogenous feed was prepared for all the groups. Feed A was control; feed B was reformulated by addition of 1% urea, while Feed C was reformulated by addition of 1% Optigen. Among three treatment groups, highest milk production was observed in group C reformulated with addition of 1% Optigen, lowest milk production was with group A. However, there was non-significant difference (P >= 0.05) among all three treatment groups for milk production and milk composition. Difference in milk urea nitrogen level was non-significant (P >= 0.05) among all treatment groups. There was slight increase in milk urea nitrogen level in group B while decrease in milk urea nitrogen was observed in group A and C, respectively. Blood urea nitrogen level showed non-significant difference (P >= 0.05) among all groups. It was concluded that the use of Optigen in buffalo feed improved the milk production without affecting milk composition. It can replace the conventional NPN sources without any adverse effects on health of buffaloes.