Effect of zinc methionine supplementation on productive performance of lactating friesian cows
2011
Gaafar, H.M.A | Bassiouni, M.I | Alí, M.F.E. | Shitta, A.A | Shamas, A.Sh. E.
Twelve lactating Friesian cows with body weight of 450 to 550 kg and at 2nd to 5th lactating season were used after 8 weeks of calving in a complete switch–back design. The cows were fed the basal ration consisted of 35% concentrate feed mixture + 40% berseem + 25% rice straw (on DM basis) without supplementation (G1) or supplemented with 5 g zinc methionine per head per day for G2 and 10 g zinc methionine per head per day for G3. Nutrients digestibility coefficients and nutritive values were increased significantly (P
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