Evaluate growth performance (daily gain and FCR) for cattle, pigs and sheep during fattening.
Key formulas: Math.round(days×i÷segs); i÷segs×100; adg×1000
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Growth curve | Fattening pigs follow an S-shaped curve, commonly modelled by Gompertz or logistic functions of age | Winsor 1932, Proceedings of the National Academy of Sciences 18(1), the Gompertz curve |
| Feed to gain | Feed-to-gain worsens with weight as the maintenance share of intake rises | NRC 2012, Nutrient Requirements of Swine |
| Cumulative intake | Cumulative intake = total gain × summed phase feed-to-gain, sizing whole-period feed demand | NRC 2012, Nutrient Requirements of Swine |
用于肉牛、猪、羊育肥阶段的生长性能评估。输入始末体重、育肥天数与总采食量，自动计算平均日增重（ADG）、料肉比（FCR）及每公斤增重饲料成本，并给出对应畜种的生长性能评级与增重曲线推算。