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Table 10 The optimal dietary arginine levels in laying hen fed with a low-protein diet

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