Progress in ileal endogenous amino acid flow research in poultry

Table 6 Reported variability in the basal endogenous flow (g/kg dry matter intake) in broiler chickens fed nitrogen-free diets^a

Amino acids	Range of published values^a	Average^b	Coefficient of variation, %^b
Aspartic acid	0.34–1.64	0.58	25.5
Threonine	0.27–0.97	0.50	18.4
Serine	0.26–1.03	0.45	24.1
Glutamic acid	0.42–2.13	0.77	27.6
Proline	0.24–1.07	0.43	45.4
Glycine	0.21–0.83	0.36	31.8
Alanine	0.14–0.91	0.30	28.5
Valine	0.21–1.01	0.37	25.4
Isoleucine	0.16–0.86	0.30	25.0
Leucine	0.25–1.45	0.43	30.2
Tyrosine	0.12–0.64	0.23	57.1
Phenylalanine	0.15–0.83	0.31	36.3
Histidine	0.07–0.42	0.15	37.2
Lysine	0.16–1.24	0.29	38.0
Arginine	0.16–1.02	0.29	32.8
Methionine	0.05–0.36	0.09	29.8
Cysteine	0.03–0.55	0.18	33.1

^aReferences: Siriwan et al. [31]; Adedokun et al. [32]; Ravindran et al. [57]; Adedokun et al. [72]; Adedokun et al. [73]; Adedokun et al. [74]; Ravindran et al. [80]; Adedokun et al. [81]; Adedokun et al. [82]; Adedokun et al. [83]; Golian et al. [84]; Ravindran et al. [85]; Woyengo et al. [86]; Soleimani et al. [87]; Kong and Adeola [88]; Ravindran et al. [89]; Toghyani et al. [90]; Cowieson et al. [91]; Osho et al. [92]; An et al. [93]; Cowieson et al. [94]
^bAverage values and variability were calculated after removal of the following extreme outliers: Adedokun et al. [32]; Adedokun et al. [73]; Kong and Adeola [88]

ISSN: 2049-1891