Table 2 Average livestock production, feed quality, nutrient intake, and major farming input use range for different pasture-based beef cattle production systems in South America.
Calving | Rearing | Finishing | |||||
|---|---|---|---|---|---|---|---|
Extensive | Intensive | Extensive | Intensive | Extensive | Intensive | Intensive (Feedlot) | |
Stocking rate (AU ha-1) | 0.40 | 0.80 | 0.47 | 1.15 | 0.50 | 2.20 | - |
Weight gain, kg cw head-1 y-1 | 75.0 | 82.50 | 82.50 | 107.50 | 70.0 | 230.0 | 275.0* |
Dry Matter Intake, t DMI AU-1 y-1 | 3.97 | 4.18 | 3.21 | 4.61 | 4.30 | 6.95 | 4.60 |
Dry Matter Digestibility, % | 56.40 | 62.50 | 55.00 | 64.50 | 55.00 | 71.20 | 80.00 |
Gross energy, MJ AU-1 day-1 | 200.7 | 211.1 | 162.4 | 232.96 | 217.3 | 351.4 | 230.4 |
Crude protein, % | 8.20 | 10.60 | 8.10 | 11.70 | 8.10 | 13.40 | 16.0 |
Metabolizable Energy, MJ kg-1 | 8.24 | 9.45 | 8.00 | 9.39 | 8.00 | 10.37 | 13.0 |
Pasture productivity, tDM ha-1y-1 | 8.3 | 11.6 | 8.4 | 14.7 | 8.3 | 15.8 | - |
Pasture fertil., kg N-Urea ha-1y-1 | 0.00 | 50.0 | 0.00 | 50.00 | 0.00 | 200.0 | - |
Liming (Dolomite), kg ha-1 y-1 | 0.00 | 400.00 | 0.00 | 400.00 | 0.00 | 400.00 | - |
Diesel, L AU-1 y-1 | 0.00 | 0.00 | 0.00 | 5.71 | 0.00 | 28.74 | 295.9 |
Energy, L AU-1 y-1 | 0.00 | 14.50 | 0.00 | 26.27 | 0.00 | 0.00 | 77.46 |
