. 2013 Oct;26(10):1474–1483. doi: 10.5713/ajas.2013.13136

Table 6.

Apparent metabolisability coefficient (AMC) of nutrients, performance and carcass and cuts yield of broilers fed diets elaborated using prediction equations, composition tables or in vivo assay to estimate the energy values of feedstuffs

Item	Experimental diets¹								RSD²	p-value
Item	R1	R2	R3	R4	R5	R6	R7	R8	RSD²	Diet (D)	Gender (G)	D×G
AMC of dry matter (%)
8–21 d	73.95	74.53	74.61	74.15	73.62	73.03	73.40	73.84	1.25	0.03	0.53	0.51
22–35 d	76.05	76.97	76.00	76.64	76.57	76.62	76.60	76.16
36–42 d	74.85^b	76.44^a	76.04^a	75.21^b	75.40^b	75.93^a	76.33^a	75.63^b
AMC of crude protein (%)
8–21 d	64.35^b	67.90^a	65.32^a	66.01^a	66.41^a	61.75^b	64.38^b	64.82^b	3.60	<0.01	0.14	0.44
22–35 d	62.49^b	66.20^a	63.77^b	67.33^a	67.47^a	66.60^a	67.55^a	67.02^a
36–42 d	62.41^b	63.82^b	61.90^b	61.60^b	60.84^b	63.06^b	64.41^b	67.70^a
AMC of ether extract (%)
8–21 d	80.26^b	86.25^a	80.76^b	72.95^d	77.92^c	81.33^b	84.83^a	77.07^c	2.97	<0.01	0.87	0.16
22–35 d	82.54^c	88.32^a	85.92^b	80.97^c	84.97^b	83.55^b	84.49^b	80.25^c
36–42 d	80.03^c	86.92^a	81.12^c	79.68^c	80.12^c	80.34^c	83.15^b	79.58^c
Weight gain (g/bird)
1–7 d	129	125	124	125	128	130	131	126	4.34	0.21	0.45	0.61
1–21 d	877	882	864	870	874	885	892	872	2.85	0.60	<0.01	0.87
1–35 d	2,133	2,138	2,111	2,095	2,147	2,145	2,155	2,127	2.93	0.73	<0.01	0.76
1–42 d	2,838	2,846	2,811	2,797	2,865	2,826	2,865	2,787	2.04	0.18	<0.01	0.81
Feed intake (g/bird)
1–7 d	153	142	150	148	149	149	154	148	4.95	0.22	0.33	0.67
1–21 d	1,261	1,220	1,241	1,268	1,247	1,259	1,254	1,259	2.62	0.29	<0.01	0.74
1–35 d	3,352	3,263	3,352	3,375	3,361	3,391	3,389	3,427	3.12	0.31	<0.01	0.70
1–42 d	4,853^b	4,649^a	4,711^a	4,866^b	4,818^b	4,808^b	4,802^b	4,831^b	1.89	<0.01	<0.01	0.81
Feed:gain
1–7 d	1.19	1.13	1.2	1.19	1.16	1.14	1.17	1.18	4.08	0.25	0.39	0.62
1–21 d	1.44^c	1.39^a	1.44^c	1.46^d	1.43^c	1.43^c	1.41^b	1.45^c	1.01	<0.01	<0.01	0.59
1–35 d	1.57^b	1.53^a	1.59^c	1.61^d	1.57^b	1.58^c	1.57^b	1.61^d	1.44	<0.01	<0.01	0.68
1–42 d	1.72^c	1.64^a	1.68^b	1.74^d	1.69^b	1.71^c	1.68^b	1.74^d	1.32	<0.01	<0.01	0.72
Carcass
Carcass yield (%)	73.38^b	76.04^a	75.75^a	74.53^b	75.20^a	75.59^a	75.90^a	73.64^b	1.80	<0.01	0.30	0.77
Chest yield (%)	38.18	39.17	38.93	39.62	38.49	39.42	38.62	38.28	4.32	0.75	0.02	0.89
Back yield (%)	22.76	21.93	23.01	22.40	23.12	22.70	22.96	22.45	4.67	0.57	0.59	0.83
Thighs+drumsticks yield (%)	28.82	28.6	27.93	27.97	28.21	27.78	28.24	29.03	4.11	0.52	<0.01	0.65
Wings yield (%)	10.35	9.91	10.04	10.14	9.91	10.08	9.74	10.24	4.77	0.44	0.52	0.88
Abdominal fat (%)	1.97	1.68	1.66	1.53	1.87	1.77	1.5	2.02	11.11	0.18	0.12	0.59

See Table 1 for description.

RSD = Relative standard deviation (%).

^a,b

Values with different letters within a row are different by SNK test (p<0.05).