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Table 2 Dietary protein, NE and SID EAA requirements of growing pigsa

From: Advances in low-protein diets for swine

Item Body weight range, kg
7-20 20-50 50-80 80-110
Crude protein, % 18 15 13 12
NE contentb, kcal/kg 2450 2360 2360 2400
Amino acids, standardized ileal digestible basis, %
 Lysine 1.30 1.01 0.86 0.75
 Threonine 0.84 0.65 0.54 0.49
 Tryptophan 0.26 0.18 0.15 0.13
 Methionine + Cysteine 0.75 0.58 0.50 0.43
 Valine 0.78 0.63 0.56 0.51
Ratio of SID AA to SID lysine
 Threonine/Lysine 0.65 0.64 0.63 0.65
 Tryptophan/Lysine 0.20 0.18 0.17 0.17
 (Methionine+ Cysteine)/Lysine 0.58 0.57 0.58 0.57
 Valine/Lysine 0.60 0.62 0.65 0.68
  1. aThe recommended requirements summarized from the academic dissertation of our research group determined in China [118, 124,125,126,127,128,129]
  2. bThe NE values of feed gradients are estimated based on Noblet’s equations [115]