The present research was aimed to study the effect of sprouted barley grains (Hordeum vulgare L.) on different levels of olive cake (OC) and barley straw as media. A laboratory study was conducted to show the performance of sprouted barley grain on tested roughages media by fodder yield and conversion ratio values; followed by five digestibility trials which conducted to evaluate the digestibility of experimental roughages by using twenty five desert male goats (20 months old) with average 22.50±2.54kg live body weight. Animals were randomly divided into five equal groups of 5 animals each to receive one of the following experimental roughages G1: alfalfa ad libitum as (control); G2: sprouted barley grains on 75% olive cake (OC) + 25% barley straw (BS) ad libitum; G3: sprouted barley grains on 50% olive cake (OC) + 50% barley straw (BS) ad libitum; G4: sprouted barley grains on 25% olive cake (OC) +75% barley straw (BS) ad libitum; G5: sprouted barley grains on 100% barley straw (BS) ad libitum. The best treated group from the results of digestibility trail was conducted feeding trail. Results showed that the treatments with sprouted barely increase CP, ash and C.CHO contents while DM, OM, EE, CF, NDF, ADF and ADL contents were decreased. Sprouted barely on olive cake or barley straw revealed a significant (P≤0.05) improvement in OM, CP, EE, CF, NFE, NDF, ADF and hemicellulose digestibility. Nutritive values expressed as TDN g/Kg BW and DCP% increased significantly (P≤0.05) in treated groups G1 and G2 followed by G3, G4 and the lowest values were in G5. Also, goats fed the four sprouted mixture recorded higher significantly (P≤0.05) of N balance compared with G1 (control group) with insignificant differences in Na and K balance (g/kg BW) values between studied groups. Goats fed sprouted barely had significantly (P≤0.05) higher values of total volatile fatty acids (VFA's) and ruminal ammonia (NH3-N) concentration post feeding with 3 hours. Serum total proteins, albumin, globulin, urea and creatinin were increased (P≤0.05) compared with untreated roughages. Feed cost LE/gm gain was improved by goats fed on G2 and G3 with percent (34.15 and 32.52% respectively) in compared to control diet. Relative economical efficiency was improved by 90.77% in G2 comparison with the control diet. In conclusion we can produce green fodder by utilizing dried olive cake and barley straw by simple methodology using crop sprouts barley without any harmful effect on goats.
Keywords: Olive cake, barley straw, sprouted barley, goats, growth, rumen and blood parameters.
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