Performance, Puberty, Pregnancy, and Hemato-bichemical Parameters of Friesian Heifers Orally Administrated with Protected Fat or Glycerol
Performance, Puberty, Pregnancy, and Hemato-bichemical Parameters of Friesian Heifers Orally Administrated with Protected Fat or Glycerol
Wael Mohamed Wafa1*, Mohammed Mahmoud Hegazy1, Mohamed Mohamed El-said Ibrahim1, Hamdy Abdala El-Nagar1, Rehab Fawzy Ismail2
ABSTRACT
The objective of this study was to evaluate the impact of protected fat (PF) or glycerol (GL), oral administration on puberty, some metabolic parameters, and pregnancy rate of Friesian heifers. Eighteen Friesian female calves (14.55±1.15 months of age and 205.0±16.09 kg LBW) were divided into three groups (6 in each) according to age and body weight. All groups were fed same diet; control group was untreated (CG), while those in the 2nd and 3rd groups were orally treated with 300 ml GL/head/twice/week (GG) or daily 25 g PF/100 LBW (PFG) from 14 to 18 month of age. Results showed that PFG achieved the highest (P<0.05) body weights, weight gains, and body measurements at puberty, 1st service, and conception. Values of red and white blood cells, hemoglobin, packed cell volume, plasma total proteins, globulin, glucose, total cholesterol, total lipids, and triglycerides increased (P<0.05), while those of urea-N, creatinine, and aspartate and alanine transaminases decreased (P<0.05) in GG and PFG compared with CG. Ages at puberty, 1st service, and conception were earlier (P<0.05) in GG and PFG than in CG. Pregnancy rate was the highest in GG (100%), followed by PFG (83.3%), and the lowest in CG (66.7%) within a service period of 90-days (P<0.05). Plasma progesterone at puberty and conception was higher (P<0.05) in GG and PFG than in CG. In conclusion, pre-puberty treatment of female calves orally with 300 ml glycerol twice/week/head or protected fat (25 g/100 kg) for 4 months is important for raising breeding heifers for precious puberty, early ages at 1st service and conception, increased pregnancy rate, and better body confirmation.
Keywords | Friesian heifers, Glycerol, Protected fat, Puberty, Health status.
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