Effects of feed form and feed particle size with dietary L- threonine supplementation on performance, carcass characteristics and blood biochemical parameters of broiler chickens

Table 2 Effects of dietary treatments on growth performance (gr/day) of broilers

Treatment	Weight gain			Feed intake			FCR¹
	1-21	21-42	1-42	1-21	21-42	1-42	1-21	21-42	1-42
Feed form
Mash	56.7^b	66.0	61.4^b	91.7^b	121.9^b	106.8^b	1.61	1.86	1.74
Pellet	61.5^a	70.4	65.9^a	101.8^a	131.8^a	116.7^a	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
+	60.3^a	66.9	63.6	97.3	124.6^b	110.9	1.61	1.88	1.75
-	57.9^b	69.5	63.7	96.2	129.2^a	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.

ISSN: 2055-0391