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Table 2 Limitation order of essential amino acids in low protein diets

From: Effect of different dietary protein levels and amino acids supplementation patterns on growth performance, carcass characteristics and nitrogen excretion in growing-finishing pigs

Item

25–50 kg phase

50–75 kg phase

75–100 kg phase

100–125 kg phase

First limiting AA

Lys (54.74 %)

Lys (51.57 %)

Lys (46.67 %)

Lys (44.49 %)

Second limiting AA

Met (64.77 %)

Thr (64.80 %)

Thr (61.26 %)

Thr (60.70 %)

Third limiting AA

Thr (66.52 %)

Trp (68.14 %)

Trp (64.29 %)

Trp (62.56 %)

Fourth limiting AA

Trp (71.04 %)

Met (68.21 %)

Met (69.56 %)

Ile (72.29 %)

Fifth limiting AA

Val (78.76 %)

Ile (76.16 %)

Ile (76.17 %)

Met (73.81 %)

Sixth limiting AA

Ile (79.27 %)

Val (81.07 %)

Val (80.73 %)

Val (83.20 %)

Seventh limiting AA

His (92.59 %)

His (96.95 %)

Phe (96.39 %)

 

Eighth limiting AA

Phe (96.49 %)

Phe (97.38 %)

His (98.97 %)

 
  1. The percentages in parentheses represent the ratio of the amino acids content in the low protein diet(−4%) without addition of synthetic amino acids) to the NRC (2012)