From: The optimal dietary arginine level of laying hens fed with low-protein diets
Criteria | Model | Independent variables | Regression equation | Arginine requirement | R2 |
---|---|---|---|---|---|
Laying rate, % | Quadratic polynomial | Dietary Arg level | - 142.27 + 522.09X - 293.71X2 | 0.89% | 0.73 |
 | Quadratic broken-line | Dietary Arg level | 90.67–1731.7(X - 0.85)2 - 27.24(X - 0.85) | 0.85% | 0.98 |
Egg mass, g/hen/d | Quadratic polynomial | Dietary Arg level | - 117.81 + 388.79X - 217.43X2 | 0.89% | 0.82 |
 | Quadratic broken-line | Dietary Arg level | 56.45–686.7(X - 0.86)2 - 18.9(X - 0.86) | 0.86% | 0.97 |
Feed efficiency | Quadratic polynomial | Dietary Arg level | 8.86–14.32X + 8.0X2 | 0.90% | 0.77 |
 | Quadratic broken-line | Dietary Arg level | 2.44 + 26.43(X - 0.86)2 + 0.7(X - 0.86) | 0.86% | 0.96 |