Table 3.

Effects of dietary substitution of ZnSO₄ by low levels of ZnMet on apparent total tract digestibility (ATTD) of nutrients for 37- to -79-d-old piglets ¹.

Item	Control	ZnSO4 + ZnMet, mg/kg				SEM	p-Value	p-Value
	100 + 0	75 + 12.5	50 + 25	25 + 37.5	0 + 50			Linear	Quadratic
DM, %	86.59	86.40	87.79	84.34	87.05	0.775	0.977	0.745	0.926
OM, %	88.45	88.23	89.46	88.24	89.07	0.692	0.973	0.586	0.860
CP, %	81.71	81.77	82.03	79.09	80.01	0.412	0.172	0.061	0.174
GE, % 2	82.00	83.13	83.99	82.13	83.90	0.812	0.897	0.439	0.710
Zn, %	29.12 b	32.76 ab	34.11 a	35.25 a	35.52 a	0.592	0.037	0.002	0.004

^{a, b} Means within a row with different superscripts differ significantly (p < 0.05).¹ Values are means and pooled SEMs, n = 7. ² DM, dry matter; OM, organic matter; CP, crude protein; GE, gross energy.