Table-1.
Metabolic heat production of Sahiwal and Karan Fries heifers during two different feeding regimes.
| Parameters | Sahiwal | Karan Fries | ||
|---|---|---|---|---|
| Feed-1 | Feed-2 | Feed-1 | Feed-2 | |
| Body weight (kg) | 167.50±4.08 | 221.50±7.91** | 221.83±15.63 | 297.00±13.47** |
| Metabolic body weight (kg) | 46.54±0.85 | 57.38±1.53** | 57.34±3.05 | 71.47±2.43** |
| Basal metabolic rate (kg) | 3023.36±54.20 | 3710.45±96.89** | 3707.61±193.51 | 4599.94±153.66** |
| Respiration rate (bpm) | 21.50±0.56 | 22.83±0.40 | 24.33±0.98 | 26.33±0.88 |
| Tidal volume (L) | 2.27±0.07 | 2.18±0.07 | 2.20±0.13 | 2.17±0.12 |
| Calculating time (min) | 3.94±0.12 | 3.81±0.14 | 3.76±0.24 | 3.60±0.25 |
| Volume in Douglas bag (L) | 188.21±0.52 | 188.76±1.57 | 196.70±2.35 | 201.36±1.46 |
| VE (ATPS) (L/min) | 48.83±1.50 | 49.91±2.02 | 53.39±3.36 | 57.17±3.66 |
| VO2 (ATPS) (L/min) | 1.00±0.03 | 1.17±0.04* | 1.28±0.09 | 1.49±0.08 |
| VCO2 (ATPS) (L/min) | 0.89±0.01 | 0.99±0.03* | 0.99±0.06 | 1.11±0.07 |
| VCH4 (ATPS) (L/min) | 0.05±0.001 | 0.04±0.005 | 0.08±0.008 | 0.07±0.009 |
| VE (STPD) (L/min) | 40.29±1.24 | 41.17±1.67 | 44.04±2.77 | 47.17±3.01 |
| VO2 (STPD) (L/min) | 0.82±0.02 | 0.96±0.03* | 1.06±0.07 | 1.23±0.07 |
| VCO2 (STPD) (L/min) | 0.73±0.008 | 0.81±0.030* | 0.82±0.05 | 0.92±0.06 |
| VCH4 (STPD) (L/min) | 0.04±0.001 | 0.03±0.004 | 0.06±0.007 | 0.06±0.007 |
| HP/min (kcal) | 4.06±0.11 | 4.70±0.17* | 5.31±0.21 | 5.99±0.21* |
| HP/day (kcal) | 5858.01±163.30 | 6779.90±250.37* | 7653.67±304.36 | 8634.67±312.91* |
| HP/metabolic body weight (kcal/kg0.75) | 125.92±3.23 | 118.20±3.48 | 134.83±7.20 | 120.76±0.43 |
*
p<0.05 and
**
p<0.01 differ significantly at 5% and 1% level, respectively, within breed.
STPD=Standard temperature and pressure, ATPS=Ambient temperature and pressure, HP=Heat production