Effect of supplemental glycerol monolaurate and oregano essential oil blend on the growth performance, intestinal morphology, and amino acid digestibility of broiler chickens

Table 2 Effects of supplemental GLM and oregano EO blend on the broilers’ apparent ileal digestibility coefficient (AID%) of amino acids

Parameters	T1	T2	T3	T4	SEM	Regression *
						Linear	Quadratic	Cubic
Lysine	89.12	89.38	88.95	88.95	0.07	0.17	0.37	0.11
Methionine	87.54	87.57	87.7	87.08	0.05	0.25	0.19	0.41
Threonine	85.71^a	84.81^ab	84.35^b	85.67^a	0.11	0.53	0.001	0.17
Tryptophan	87.67	88.28	87.90	87.22	0.17	0.40	0.18	0.73
Arginine	90.45^a	90.04^b	90.28^ab	90.31^ab	0.04	0.62	0.02	0.03
Valine	86.01	85.87	85.69	85.76	0.06	0.20	0.49	0.68
Leucine	90.68	90.56	90.74	90.67	0.05	0.82	0.82	0.33
Isoleucine	86.10	86.10	86.16	86.26	0.04	0.39	0.71	0.97

^a,b Means within the same row carrying different superscripts are significantly different (P < 0.05). T1: Control group; T2, T3, and T4: basal diet supplemented with 0.15 or 0.45 or 0.75% mixture of GLM and EO, respectively. * Regression is significant at P < 0.05

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