Table 2.

Growth performance of Muscovy ducks fed different levels of dietary Quebracho tannin (QT) from 42 to 84-d age (n = 6 pens /treatment; 7 birds/pen).

Items	Age	Diet 1			SEM	p-Value
		QT0	QT1.5	QT2.5		Linear	Quadratic
LBW, g	42 d	1699	1653	1676	14.6	0.541	0.259
	56 d	2703	2667	2635	16.4	0.094	0.949
	70 d	3408	3272	3330	20.6	0.126	0.023
	84 d	3787	3784	3789	19.1	0.956	0.913
ADWG, g/d	42–56 d	71.8	72.4	68.5	0.77	0.084	0.147
	56–70 d	50.3	43.2	49.7	0.69	0.688	0.000
	70–84 d	27.0	36.5	32.8	0.75	0.001	0.000
	42–84 d	49.7	50.73	50.3	0.42	0.571	0.414
ADFI, g/d	42–56 d	241	242	259	4.09	0.063	0.266
	56–70 d	232	227	269	7.44	0.010	0.036
	70–84 d	221	228	239	5.23	0.188	0.834
	42–84 d	231	232	256	4.75	0.014	0.116
FCR, g/g	42–56 d	3.36	3.34	3.83	0.11	0.077	0.230
	56–70 d	4.61	5.28	5.46	0.20	0.090	0.536
	70–84 d	8.72	6.31	7.35	0.45	0.147	0.052
	42–84 d	4.68	4.58	5.11	0.11	0.114	0.172

¹ QT0 = basal diet; QT1.5 and QT2.5 = the basal diet supplemented with QT at 1.5% and 2.5%, respectively. Note: SEM: standard error of the mean; LW: live body weight; ADWG: average daily weight gain; ADFI: average daily feed intake; FCR: feed conversion ratio.