Table 5.

Live weight, weight gain, feed conversion rate for control and bird supplemented with Essential and AME, AME_n and coefficients of protein and ether extract digestibility for the control and Essential supplemented diets (Exp. 2)

	Days	Control	Essential	SEM	p value
Live weight	14	381.6	400	8.2	0.28
	28	1,247.3	1,255.8	12.3	0.75
	42	2,644.1	2,682.2	24.6	0.46
Weight gain	1 to 14	337.8	356	8.2	0.29
	15 to 28	865.7	855.845	12.8	0.72
	29 to 42	1,396.9	1,426.4	20.9	0.51
	1 to 42	2,644.2	2,682.2	24.6	0.46
Feed conversion	1 to 14	1.542	1.5	0.019	0.31
	15 to 28	1.751	1.756	0.019	0.89
	29 to 42	1.911	1.851	0.021	0.16
	1 to 42	1.806	1.772	0.01	0.08
AME (kcal/kg)		2,777a	2,881b	41	0.003
AMEn (kcal/kg)		2,449a	2,568b	41	0.001
CDP (%)		63.59	63.69	2	0.93
CDEE (%)		63.91	56.14	5	0.15

AME, apparent metabolizable energy; AME_n, nitrogen-corrected apparent metabolizable energy; SEM, standard error of the mean; CDP, coefficient of protein digestibility; CDEE, coefficient of ether extract digestibility.

Values for performance parameters are means of 9 replicate pens per treatment, with each pen having 33 birds at 1 d of age.

Values for digestibility parameters are means of 7 replicate pens per treatment, with each pen having 9 birds at 21 d of age.

^abMeans with a different superscript letter within a row are significantly different (p<0.001).