Table 5.

Effect of SID Leu, Val, and Ile content in low-protein diets on growth performance of male broiler from 14 to 28 D of age (experiment 2).¹

Treatment	SID amino acids (%)			Feed intake (g)	BW gain (g)	Gain:feed (g/g)2
	Leu	Val	Ile
1	1.45	0.97	0.89	1,587	1,022	644
2	1.45	0.97	0.69	1,594	1,068	670
3	1.45	0.77	0.89	1,623	1,039	640
4	1.45	0.77	0.69	1,579	1,021	647
5	1.15	0.97	0.89	1,545	1,045	676
6	1.15	0.97	0.69	1,588	1,009	635
7	1.15	0.77	0.69	1,542	1,000	648
8	1.30	0.87	0.79	1,590	1,097	690
9	1.30	0.87	0.59	1,599	1,043	652
10	1.30	0.87	0.99	1,568	1,020	650
11	1.30	1.07	0.79	1,583	1,014	641
12	1.30	0.67	0.79	1,593	1,040	653
13	1.00	0.87	0.79	1,603	1,040	648
14	1.60	0.87	0.79	1,550	1,005	649
15	1.15	0.77	0.89	1,591	1,029	647
SEM				22.34	18.55	8.51
Response Surface				P-Value
Linear				0.97	0.99	0.95
Quadratic				0.96	0.03	0.01
Cross product (Leu x Val x Ile)				0.17	0.27	0.04
Total model				0.76	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.