Table 2.

Effects of dietary treatments on growth performance (gr/day) of broilers

Treatment	Weight gain			Feed intake			FCR 1
	1-21	21-42	1-42	1-21	21-42	1-42	1-21	21-42	1-42
Feed form
Mash	56.7b	66.0	61.4b	91.7b	121.9b	106.8b	1.61	1.86	1.74
Pellet	61.5a	70.4	65.9a	101.8a	131.8a	116.7a	1.65	1.89	1.77
Feed size
Course	59.4	66.7	63.1	97.5	127.2	112.0	1.64	1.91	1.78
Fine	58.8	69.6	64.2	95.9	126.5	111.6	1.63	1.83	1.73
L-threonine
+	60.3a	66.9	63.6	97.3	124.6b	110.9	1.61	1.88	1.75
-	57.9b	69.5	63.7	96.2	129.2a	112.7	1.66	1.86	1.76
SEM	0.69	1.79	0.89	0.61	1.36	0.90	0.02	0.04	0.02
Interaction effects
	Probability value
A × B	0.67	0.93	0.94	0.20	0.71	0.86	0.78	0.87	0.93
A × C	0.56	0.10	0.15	0.01	0.57	0.16	0.34	0.03	0.01
B × C	0.24	0.17	0.35	0.17	0.71	0.83	0.60	0.20	0.25
A × B × C	0.25	0.10	0.04	0.69	0.66	0.63	0.34	0.09	0.03

^a-bMeans without a common superscripts in per column are significantly different (P < 0.05).

¹FCR: Feed conversion ratio.

A: feed form; B: feed size; C: L-threonine.