Ead,, H., Maklad, E. (2006). INFLUENCE OF FEEDING DIFFERENT LEVELS OF SOYBEAN MEAL IN GROWING FRIESIAN CALVES RATIONS ON: 1- PRODUCTIVE PERFORMANCE AFTER WEANING.. Journal of Animal and Poultry Production, 31(3), 1335-1352. doi: 10.21608/jappmu.2006.235448
H, M. E. Ead,; Eman H. M. Maklad. "INFLUENCE OF FEEDING DIFFERENT LEVELS OF SOYBEAN MEAL IN GROWING FRIESIAN CALVES RATIONS ON: 1- PRODUCTIVE PERFORMANCE AFTER WEANING.". Journal of Animal and Poultry Production, 31, 3, 2006, 1335-1352. doi: 10.21608/jappmu.2006.235448
Ead,, H., Maklad, E. (2006). 'INFLUENCE OF FEEDING DIFFERENT LEVELS OF SOYBEAN MEAL IN GROWING FRIESIAN CALVES RATIONS ON: 1- PRODUCTIVE PERFORMANCE AFTER WEANING.', Journal of Animal and Poultry Production, 31(3), pp. 1335-1352. doi: 10.21608/jappmu.2006.235448
Ead,, H., Maklad, E. INFLUENCE OF FEEDING DIFFERENT LEVELS OF SOYBEAN MEAL IN GROWING FRIESIAN CALVES RATIONS ON: 1- PRODUCTIVE PERFORMANCE AFTER WEANING.. Journal of Animal and Poultry Production, 2006; 31(3): 1335-1352. doi: 10.21608/jappmu.2006.235448
INFLUENCE OF FEEDING DIFFERENT LEVELS OF SOYBEAN MEAL IN GROWING FRIESIAN CALVES RATIONS ON: 1- PRODUCTIVE PERFORMANCE AFTER WEANING.
1Animal Production Research Institute, Agriculture Research Center, Dokki, Giza, Egypt.
2Animal Production Department, Faculty of Agriculture, Mansoura University, Egypt.
Abstract
Fifteen male Friesian calves with average body weight of 150 + 14 kg and 8 + 0.94 month of age were used in this study. Calves were randomly distributed into three similar groups (five for each). The experimental rations were formulated as follows: ration 1 (R1): 63 % concentrate feed mixture (CFM) + 37 % clover hay (CH) (control), ration 2 (R2): 52.5 % CFM +7.5% soybean meal (SBM)+40% CH and ration 3 (R3): 47 % CFM +11% SBM+42% CH.
The partial replacement of CFM by SBM increased the CP% of rations 2 and 3. The CP concentration of the tested rations was 13.6, 15.6 and 16.6% for R1, R2 and R3, respectively. Nutrients digestibility tended to be higher (p < 0.05) when SBM was supplemented at 11% than 7.5%. The TDN%, ME (Mcal/kg) , NE (Mcal/kg) and g CPI / ME Mcal were higher (p < 0.05) with feeding on R2 or R3 than R1, while the TDN: CP ratio was higher (p < 0.05) for R1 than R2 and R3. Likewise, digested dry matter (DDM%) was higher (p < 0.05) when feeding calves on R2 and R3 than R1. The relative feeding values (RFV), relative feeding quality (RFQ) and quality index (QI) were higher (p < 0.05) when the rations supplemented with SBM.
The total concentration of ruminal VFA was higher (p < 0.05) for calves fed R2 and R3 than R1. Blood urea-N and glucose concentration were higher (p < 0.05) for calves fed R3 than those fed R1 and R2.
The average daily gain kg/day and feed efficiency were higher (p < 0.05) when animals were fed R2 or R3 than R1.
It could be concluded that the replacement CFM by SBM at a level 11% level of total DMI would improve nutrients digestibility, average daily gain and feed conversion of the growing calves.
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