re 2).
Figure 2. Effect of low protein, amino acid supplemented diets on carcass quality and growth performance of pigs fed ad libitum (diets were formulated using NE and SID basis; 55 to 105 kg body weight)
The implementation of feed formulation with the NE system, especially for pig, enables a more effective assessment of raw materials and feeds in order to optimize animal performance, carcass traits and feed costs. When amino acid and energy dietary contents are estimated properly, with accurate and practical nutritional systems (SID amino acids and NE), carcass quality as well as pig growth performance can be kept under control.