Table 8.

Diet composition and age of broilers from studies investigating Thr and Gly interactions.¹

Item	Waldroup et al. (2005)	Ospina-Rojas et al. (2013a)	Corzo et al. (2009)	Ospina-Rojas et al. (2013b)	Siegert et al. (2015b)2
Age, d	1 to 21	1 to 21	21 to 42	21 to 35	1 to 21
CP, %	15.0	19.1	17.1	16.6	17.4
AFD Lys, %	1.07	1.23	0.94	1.05	1.34
AFD Thr-to-Lys ratio, %	60 to 94	62 to 73	56 to 67	61 to 68	43 to 72
AFD (Met + Cys)-to-Lys ratio, %	60	70	77	72	66
AFD Cys-to-Lys ratio, %	17	18	24	19	25
AFD Val-to-Lys ratio, %	64	73	72	75	96
AFD (Gly + Ser)-to-Lys ratio, %	96 to 133	127 to 162	139 to 149	112 to 140	99 to 178
Thr × Gly interaction	No	Yes, for FCR	Yes, for BWG	Yes, for FCR	Yes, for BWG and FCR

AFD = Apparent faecal digestibility; BWG = body weight gain.

¹Values are recalculated using tables of Schothorst Feed Research, except for Siegert et al. (2015b).

²Expressed in analysed total Thr-to-Lys ratio and total Gly_equi-to-Lys ratio.