Table 3.
The contents of metabolites (mg/100 g) in the thigh meat of different broiler strain (Cobb and Ross 308) reared from conventional (Con) and animal-welfare (Wel) farms

Item	Farm	Strain		SEM¹
Item	Farm	Cobb	Ross	SEM¹
Amino acid
Alanine	Con	40.79	37.61	1.828
	Wel	37.61	36.98	2.361
	SEM	1.315	2.681
Anserine	Con	122.81^y	133.54	5.462
	Wel	141.46^x	162.98	14.709
	SEM	5.905	14.537
Aspartic acid	Con	12.28^b^x	16.25^a	0.704
	Wel	9.58^b^y	16.09^a	0.858
	SEM	0.478	1.002
Creatine	Con	295.36^a^y	227.26^b^y	7.735
	Wel	322.13^x	282.78^x	15.682
	SEM	8.372	15.351
Glutamic acid	Con	37.50^x	33.03	1.555
	Wel	31.55^y	35.46	2.575
	SEM	1.122	2.791
Glycine	Con	54.28^x	50.07	2.510
	Wel	47.74^y	50.05	3.285
	SEM	1.871	3.687
Isoleucine	Con	5.47^x	6.33	0.381
	Wel	4.24^b^y	6.09^a	0.518
	SEM	0.288	0.575
Leucine	Con	5.56^x	6.36	0.416
	Wel	4.44^b^y	6.34^a	0.561
	SEM	0.303	0.629
Phenylalanine	Con	5.22^x	5.78	0.305
	Wel	4.39^b^y	5.89^a	0.456
	SEM	0.177	0.519
Taurine	Con	84.09	82.42	5.390
	Wel	73.41^b	98.68^a	6.211
	SEM	4.582	6.829
Tyrosine	Con	7.82^b	9.32^a	0.462
	Wel	8.14	8.65	0.532
	SEM	0.327	0.624
Valine	Con	7.45^x	8.09	0.466
	Wel	5.78^b^y	7.75^a	0.626
	SEM	0.376	0.684
β-Alanine	Con	21.97	17.11	1.899
	Wel	27.67^a	18.19^b	2.122
	SEM	2.073	1.953
Nucleotide-related product
Hypoxanthine	Con	12.03	13.12	0.650
	Wel	10.51^b	13.79^a	0.959
	SEM	0.561	1.013
IMP	Con	92.82	89.33^y	4.367
	Wel	107.70	112.44^x	7.110
	SEM	5.080	6.619
Inosine	Con	35.97^a	27.62^b	2.041
	Wel	34.41^a	27.76^b	2.150
	SEM	2.264	1.914
NAD	Con	4.36^a^y	3.00^b^y	0.173
	Wel	5.04^x	4.48^x	0.405
	SEM	0.200	0.393
UMP	Con	1.58	1.59^y	0.112
	Wel	1.61^b	2.40^a^x	0.235
	SEM	0.134	0.224
Uracil	Con	1.15^x	1.39	0.081
	Wel	0.91^b^y	1.60^a	0.110
	SEM	0.075	0.114
Organic acid
Acetate	Con	4.25^a	3.72^b	0.154
	Wel	4.79	4.32	0.440
	SEM	0.238	0.401
Fumarate	Con	0.61^a^x	0.24^b	0.029
	Wel	0.38^a^y	0.26^b	0.023
	SEM	0.031	0.020
Lactate	Con	275.76^y	317.94	14.434
	Wel	334.21^x	354.75	21.791
	SEM	13.922	22.121
Methylmalonate	Con	3.37	3.81	0.167
	Wel	3.60	4.34	0.275
	SEM	0.136	0.292
Others
Ethanol	Con	1.72	1.78	0.238
	Wel	1.71	2.66	0.408
	SEM	0.222	0.417
Glucose	Con	7.37^b^y	11.15^a	0.653
	Wel	9.80^x	11.31	1.043
	SEM	0.522	1.114
Niacinamide	Con	3.14	3.33^y	0.088
	Wel	3.25^b	4.18^a^x	0.236
	SEM	0.077	0.240

Standard error of mean (n=20).
Different letters within the same row differ significantly (P<0.05).
Different letters within the same column differ significantly (P<0.05).