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

Table 4 Effects of different lysine and arginine allowance on growth performance of AA broilers

Item		Con(+)	Con(-)	L&A(-)	L&A(+)	SEM	P-value
Male
0–14 d	IBW	0.044	0.043	0.044	0.043	< 0.001	0.423
	FBW	0.347^b	0.383^a	0.341^b	0.371^a	0.004	< 0.001
	ADFI	0.029^b	0.034^a	0.029^b	0.032^a	0.001	0.007
	ADG	0.022^bc	0.025^a	0.021^c	0.023^bc	< 0.001	0.005
	FCR	1.304	1.363	1.377	1.402	0.027	0.182
15–28 d	FBW	1.244^b	1.262^b	1.262^b	1.296^a	0.008	0.020
	ADFI	0.094^b	0.104^a	0.101^a	0.101^a	0.002	0.014
	ADG	0.064^ab	0.063^b	0.065^a	0.066^a	0.001	0.054
	FCR	1.462^b	1.656^a	1.545^ab	1.533^b	0.032	0.025
29–40 d	FBW	2.338^bc	2.313^c	2.375^b	2.508^a	0.016	< 0.001
	ADFI	0.145^b	0.148^b	0.154^a	0.159^a	0.002	0.004
	ADG	0.091^b	0.087^b	0.093^b	0.101^a	0.002	0.012
	FCR	1.591	1.690	1.667	1.576	0.038	0.227
0–40 d	ADFI	0.086^c	0.092^b	0.092^b	0.094^a	0.001	< 0.001
	ADG	0.058^b	0.057^b	0.058^ab	0.062^a	0.001	0.063
	FCR	1.499^b	1.631^a	1.576^ab	1.532^b	0.026	0.039
Female
0–14 d	IBW	0.043	0.044	0.044	0.044	< 0.001	0.680
	FBW	0.340^b	0.361^ab	0.335^b	0.387^a	0.009	0.024
	ADFI	0.029^bc	0.032^ab	0.029^c	0.034^a	0.001	0.007
	ADG	0.021^b	0.023^ab	0.021^b	0.024^a	0.001	0.044
	FCR	1.362	1.370	1.367	1.384	0.022	0.946
15–28 d	FBW	1.195^b	1.194^b	1.243^ab	1.311^a	0.027	0.090
	ADFI	0.090^b	0.094^ab	0.097^ab	0.101^a	0.002	0.036
	ADG	0.061^ab	0.059^b	0.065^a	0.066^a	0.002	0.076
	FCR	1.480^b	1.588^a	1.495^b	1.543^ab	0.024	0.060
29–40 d	FBW	2.235^b	2.194^b	2.243^b	2.422^a	0.035	0.020
	ADFI	0.137	0.140	0.141	0.152	0.004	0.169
	ADG	0.087^b	0.083^b	0.083^b	0.093^a	0.002	0.016
	FCR	1.588	1.685	1.701	1.643	0.039	0.441
0–40 d	ADFI	0.083^b	0.086^b	0.086^ab	0.093^a	0.002	0.042
	ADG	0.055^b	0.054^b	0.055^b	0.059^a	0.001	0.002
	FCR	1.517	1.605	1.571	1.565	0.026	0.231

Con(+) The normal-protein control group, Con(-) The low-protein control group, L&A(-) The lysine and arginine restriction group, L&A(+) The lysine and arginine 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