. 2022 Dec 21;102(3):102441. doi: 10.1016/j.psj.2022.102441

Table 3.

Effect of a LPD supplemented with isoleucine (Ile) on growth performance of broilers.

Item¹	CON²	LPD	LPD-LI	LPD-HI	SEM	P-value
Days 0–21
ADG (g)	35.86	35.02	35.69	35.23	0.420	0.175
ADFI (g)	50.32	49.48	50.27	49.97	0.584	0.464
F:G	1.40	1.41	1.41	1.42	0.023	0.948
Days 21–42
ADG (g)	77.51^a	66.59^b	77.87^a	77.74^a	0.962	<0.001
ADFI (g)	134.88^a	124.73^b	137.28^a	137.88^a	1.637	<0.001
F:G	1.74^b	1.87^a	1.77^b	1.78^b	0.020	<0.001
Days 0–42
ADG (g)	56.63^a	50.61^b	56.61^a	56.30^a	0.521	<0.001
ADFI (g)	92.48^a	86.48^b	93.44^a	93.18^a	0.801	<0.001
F:G	1.63^b	1.71^a	1.65^b	1.66^b	0.014	<0.001

ADFI, average daily feed intake; ADG, average daily gain; F:G, feed to gain ratio.

CON, control diet; LPD, low-protein diet; LPD-LI, low-protein diet + 0.13% Ile; LPD-HI, low-protein diet + 0.26% Ile.

^a,b

Mean values within a row with no common superscript differ significantly (P < 0.05).