Eighteen  dairy Zaraibi goats in 2^nd, 3^rd and 4^th season of lactation with average body weight of 37.87kg were divided randomly into three equal groups, to study the effect of substitution of berseem silage by Kochia as a source of protein in silage rations on milk yield, blood profile and feed efficiency of dairy goats. Half the crude protein (CP) requirements of lactating goats were covered from CFM. The other 50% of CP was covered from: berseem silage in the first group (G₁), 50% berseem+50% fodder beet silage in second group(G₂), 50% Kochia+50% fodder beet silage in third group (G₃). The feeding trails lasted for 14 weeks. The obtained results showed that the crude protein (CP) and crude fiber (CF) percentages of berseem silage were higher 14.20 and 29.80% than the other silages. But, the content of EE and NFE were lower (2.05 and 41.95%) in berseem silage compared with two mixture silages. But, organic matter (OM) was nearly similar in the different silages. The effect of the tested silages on most hemato-biochemical parameters was not significant. Concerning milk production, the obtained data indicated that the highest value of milk yield was recorded with G₁ (845g/h) followed by G₂ (761g/h), while the lowest value (727g/h) was recorded with G₃ and the differences were significant. Moreover, milk fat percentage was significantly (P<0.05) higher with G₃ (Kochia-fodder beet silage) compared with the other groups. The same trend was observed also with total solids among the three groups. The effect of experiment rations on  other milk content (milk protein, lactose and ash) and milk quality parameters was not significant. The feed conversion efficiency based on DM and CP, was better with G₁ compared G₃. On the contrary, the economic efficiency was better with G₃ compared with the other groups.