Table 4.

Effect of SID Leu, Val, and Ile content in low-protein diets on growth performance of male broiler from 1 to 14 D of age (experiment 1).¹

Treatment	SID amino acids (%)			Feed intake (g)	BW gain (g)	Gain:feed (g/g)2
	Leu	Val	Ile
1	1.55	1.11	0.98	477	371	779
2	1.55	1.11	0.78	472	371	787
3	1.55	0.91	0.98	447	380	851
4	1.55	0.91	0.78	483	383	795
5	1.25	1.11	0.98	472	380	805
6	1.25	1.11	0.78	471	377	801
7	1.25	0.91	0.78	477	377	792
8	1.40	1.01	0.88	471	397	842
9	1.40	1.01	0.68	471	373	792
10	1.40	1.01	1.08	476	377	793
11	1.40	1.21	0.88	474	377	796
12	1.40	0.81	0.88	479	373	780
13	1.10	1.01	0.88	482	374	777
14	1.70	1.01	0.88	470	373	794
15	1.25	0.91	0.98	468	372	794
SEM				9.36	6.29	14.92
Response Surface				P-Value
Linear				0.45	0.99	0.29
Quadratic				0.91	0.02	0.01
Cross product (Leu x Val x Ile)				0.23	0.40	0.06
Total model				0.57	0.15	0.01

Abbreviation: SID, standardized ileal digestible.

¹Values are means of 5 replicate pens per treatment (treatments = 15; n = 75).

²Values corrected for mortality.