. 2021 Apr 29;5(2):txab074. doi: 10.1093/tas/txab074

Table 4.

Growth performance of nursery pigs fed diets with different alternatives to replace pharmacological levels of Zn¹

	Positive control	Negative control	Na diformate	Coarse wheat bran	18% CP	Na diformate + wheat bran + 18% CP	SEM	P-value
BW, kg
Weaning	4.8	4.8	4.8	4.8	4.8	4.8	0.02	0.49
d 7	5.2	5.3	4.8	5.2	5.0	5.3	0.11	0.12
d 25	11.7^a	10.0^b,c	10.1^b	10.0^b,c	9.2^c	10.1^b	0.29	<0.01
d 46	24.9^a	22.9^b	22.5^bc	22.8^b,c	20.9^c	23.1^a,b,c	0.70	<0.01
Phase 1 (d 0 to 7)
ADG, g	55	63	0	48	35	64.3	14.8	0.21
ADFI, g	85	110	103	97	95	109	11.4	0.29
G/F, g/kg	557	547	30.3	455	347	509	10.1	0.12
Phase 2 (d 7 to 25)
ADG, g	358^a	262^b	275^b	269^b	221^c	267^b	14.2	<0.01
ADFI, g	457^a	358^b,c	360^b,c	357^b,c	340^b	375^c	16.4	<0.01
G/F, g/kg	758^a	705^a,b	734^a,b	714^a,b	626^c	683^b	26.4	<0.01
Phase 3 (d 25 to 46)²
ADG, g	629	608	597	605	561	620	25.4	0.14
ADFI, g	928^a	886^a,b	864^b	874^a,b	796^c	893^a,b	31.5	<0.01
G/F, g/kg	679	686	694	693	697	697	18.1	0.90
Overall (d 0 to 46)
ADG, g	437^a	389^b	379^b,c	383^b,c	341^c	397^a,b	15.8	<0.01
ADFI, g	626^a	566^b	526^b,c	553^b,c	505^c	578^a,b	21.0	<0.01
G/F, g/kg	700	687	695	692	672	688	13.3	0.40

^a,b,cDifferent superscripts within a row indicate evidence for difference (P < 0.05) in average daily gain (ADG), average daily feed intake (ADFI), gain-to-feed ratio (G:F), body weight (BW). CP = crude protein.

¹A total of 300 weaned pigs (Line 241 × 600, DNA Genetics, Columbus, NE) with an initial BW of 4.83 kg and 18.5 d of age were used. Pigs were allotted to pens in a completely randomized design with 5 pigs per pen and 10 replicates per treatment.

²Common period in which all pigs fed the same diet without feed additives from d 25 to d 46.