Table 1.

The variation in performance of pigs fed diets with CP reduced by more than 3%

BW, kg	Dietary CP levela, %		Additional supplemented AAb	Performance changedc			References
	Control diet	LP diet		ADG, g/d	ADFI, kg/d	F:G, kg/kg
24~ 40	24.1	19.3	Valine	−38	−0.24	−0.12	Morales et al. [81]
		18.1	Valine, leucine, isoleucine, histidine, phenylalanine	−33	− 0.06	−0.01
		17.3	Valine, leucine, isoleucine, histidine, phenylalanine, glycine	−13	−0.04	−0.03
7~ 11	23.1	18.9	–	14d	0.02	−0.01	Yue and Qiao [6]
		17.2	Valine, isoleucine, histidine, phenylalanine	57d	0.50	− 0.14d
6~ 13	22.8	17.4	Isoleucine	121d	0.11d	−0.30d	Nyachoti et al. [5]
50~ 80	19.5	12.0	Valine, leucine, isoleucine, histidine	111d	0.07	0.25d	Atakora et al. [135]
10~ 20	19.4	12.7	Valine, histidine, isoleucine, leucine, phenylalanine	70a	−0.01	− 0.35d	Gloaguen et al. [1]
20~ 50	18.2	13.3	–	44d	0.03	−0.09	Powell et al. [79]
		13.4	Valine, isoleucine	27	− 0.02	−0.12
		!	Glycine, arginine	64d	0.08	−0.10
		!	Valine, isoleucine, glycine, arginine	13	0.04	0.02
		!	Valine, isoleucine, glycine, glutamic acid	8	0.03	0.02
20~ 45	18.2	13.3	–	56d	−0.01	−0.26d	Roux et al. [78]
		13.4	Valine, isoleucine	30	− 0.12d	−0.26d
37~ 61	16.1	10.1	Valine, isoleucine, phenylalanine	171d	0.01	−0.44d	Guay et al. [40]
		7.8	Valine, isoleucine, phenylalanine, histidine, leucine, arginine	313d	0.06	− 0.97d
75~ 95	14.7	10.1	Valine, isoleucine, alanine	170	0.14	−0.63	Zhang et al. [19]
		10.2	Valine, isoleucine, leucine	90	0.14	− 0.18

^aAnalyzed values; “!” means data were not provided in the paper

^bAdditional supplemented AA in LP diets except FCAA; “-” means no other CAA supplemented except FCAA

^cADG = ADG (control diet)- ADG (LP diet); ADFI = ADFI (control diet)- ADFI (LP diet); F:G = F:G (control diet)- F:G (LP diet)

^d Values were significant different between LP diet and control diet