Assessment of the dietary amino acid profiles and the relative biomarkers for amino acid balance in the low-protein diets for broiler chickens

Table 6 Effects of different BCAA allowance on growth performance of AA broilers

Item		Con(+)	Con(-)	BCAA(-)	BCAA(+)	SEM	P-value
Male
0–14 d	IBW	0.044	0.043	0.043	0.043	< 0.001	0.361
	FBW	0.347^b	0.383^a	0.339^b	0.352^b	0.004	< 0.001
	ADFI	0.029^b	0.034^a	0.029^b	0.030^b	0.001	0.006
	ADG	0.022^b	0.025^a	0.021^b	0.022^b	0.001	0.018
	FCR	1.304	1.363	1.384	1.350	0.022	0.171
15–28 d	FBW	1.244^a	1.262^a	1.128^b	1.107^b	0.009	< 0.001
	ADFI	0.094^b	0.104^a	0.093^b	0.096^b	0.001	< 0.001
	ADG	0.064^a	0.063^a	0.056^b	0.054^b	0.001	< 0.001
	FCR	1.462^c	1.656^b	1.658^b	1.773^a	0.027	< 0.001
29–40 d	FBW	2.338^a	2.313^a	2.195^b	2.100^c	0.019	< 0.001
	ADFI	0.145^a	0.148^a	0.143^ab	0.139^b	0.002	0.033
	ADG	0.091^a	0.087^ab	0.089^ab	0.083^b	0.002	0.076
	FCR	1.591	1.690	1.608	1.680	0.034	0.189
0–40 d	ADFI	0.086^b	0.092^a	0.085^b	0.086^b	< 0.001	< 0.001
	ADG	0.058^a	0.057^a	0.054^ab	0.051^b	0.001	0.033
	FCR	1.499^b	1.631^a	1.585^ab	1.670^a	0.032	0.031
Female
0–14 d	IBW	0.043	0.044	0.044	0.044	< 0.001	0.751
	FBW	0.340^bc	0.361^a	0.336^c	0.358^ab	0.006	0.040
	ADFI	0.029	0.032	0.028	0.031	0.001	0.130
	ADG	0.021	0.023	0.021	0.023	0.001	0.136
	FCR	1.362	1.370	1.335	1.359	0.034	0.946
15–28 d	FBW	1.195^a	1.194^a	1.160^ab	1.150^b	0.009	0.046
	ADFI	0.090	0.094	0.094	0.095	0.002	0.298
	ADG	0.061^a	0.059^ab	0.059^ab	0.057^b	0.001	0.069
	FCR	1.480^b	1.588^a	1.606^a	1.670^a	0.024	0.005
29–40 d	FBW	2.235^a	2.194^ab	2.169^ab	2.109^b	0.023	0.053
	ADFI	0.137	0.140	0.140	0.137	0.003	0.794
	ADG	0.087^a	0.083^ab	0.084^ab	0.080^b	0.001	0.057
	FCR	1.585	1.685	1.668	1.722	0.032	0.143
0–40 d	ADFI	0.083	0.086	0.085	0.085	0.001	0.259
	ADG	0.055^a	0.054^ab	0.053^ab	0.051^b	0.001	0.158
	FCR	1.517^b	1.605^ab	1.592^ab	1.657^a	0.029	0.079

Con(+) The normal-protein control group, Con(-) The low-protein control group, BCAA(-) The BCAA restriction group, BCAA(+) The BCAA supplementation group, IBW Initial body weight, FBW Final body weight, ADFI Average daily feed intake, ADG Average daily gain, FCR Feed:Gain, SEM Standard error of the mean
^a−cDissimilar letters represent significant difference among different treatments (P < 0.05)

ISSN: 2049-1891