Effects of seaweed supplementation to dairy friesian cows rations on: 2- Milk yield, blood parameters and feed efficiency.
2011
Ead, H.M.E. | Maklad, E.H.M. | El-Shinnawy, M.M.
The experimental rations were formulated as follows: R1: ration 1: 69.3 % (CFM) + 30.7% (RS), (as a control ration). R 2: ration 2: 68.3% CFM + 30.7 % (RS) + 1.0% (S). R 3: ration 3: 67.5 % CFM + 31.0 % (RS) + 1.5% (S). These proportions were chosen to achieve approximately iso-nitrogenous and iso-caloric rations. The obtained results showed that there was no significant effect of experimental rations on total protein concentration of blood serum for R1, R2 and R3 respectively. Albumin concentration was highest (P0.05) with R2 and R3 than feeding on R1, while globulin concentration decreased (P0.05) with supplemented S. Enzyme activity AST decreased (P0.05) with R2 than R1 or R3, while ALT decreased (P0.05) with feeding on R2 than R1. Cholesterol concentration was increased (P0.05) with R2 than R1. The urea-N concentration ranged from 18.73 to 26.80 mg/100 ml in the bloodserum, and its levels was significantly (P0.05) increased when feeding on R2 or R3 than R1. The average daily fat corrected milk (FCM, 3.5%) yield was higher with feeding on R1 than feeding on R2. Regarding the milk composition, the total solids (TS) was significantly increased (P0.05) when feeding on R3 than feeding on R1 or R2. Lactose% significantly increased (P0.05) when feeding on R3 than R1, while there was no significant effect with feeding on R1 and R2 or R2 and R3. The fat was higher (P0.05) when feeding on R1 than R2, but there was no significant effect between R1 and R3 or R2 and R3. The whey protein nitrogen (WPN) or whey protein (WP) concentrations increased (P0.05) when feeding on Rl or R3 than feeding on R2. The feed efficiency was better (P0.05) with feeding on R3 than R1 and R2, but the economic efficiency was higher (P0.05) with feeding on R1 than feeding on R2 or R3.
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