Table 5.

Effects of Zn source and diet on farrowing performance of sows

	Control		DDGS			P-value
Item	ZnSO4	PSZn	ZnSO4	PSZn	SE	Diet	Zn source	Diet * Zn source
Parity	3.2	2.7	2.2	2.8	0.6	0.43	0.82	0.41
Lactation length, d	21.2	19.2	19.8	20.7	0.6	0.94	0.36	0.03
Bodyweight, kg
D80 gestation	244.4	244.4	239.5	245.8	12.5	0.80	0.68	0.67
Pre-farrow1	249.0	250.7	243.2	258.8	12.1	0.88	0.30	0.38
Post-farrow2	234.3	237.3	237.3	241.6	11.4	0.54	0.53	0.91
Weaning	239.0	236.8	225.5	226.7	13.3	0.10	0.94	0.80
Farrowing Performance
Total pigs born	14.2	14.0	16.2	14.2	1.2	0.38	0.41	0.49
Pigs born alive	11.5	11.6	15.0	13.2	1.3	0.07	0.54	0.51
Pigs weaned	10.8	10.4	13.4	11.9	1.0	0.03	0.31	0.56
Piglet birth wt., kg	1.31ab	1.29b	1.24b	1.41a	0.1	0.42	0.03	<0.01
Litter birth wt., kg3	18.1	17.7	20.2	20.4	1.7	0.17	0.96	0.87
Litter start wt., kg4	14.4b	15.1b	19.0a	18.8a	1.4	<0.01	0.84	0.76
Piglet weaning wt., kg	7.1a	6.3b	5.6c	6.7ab	0.3	<0.01	0.26	<0.01
Litter weaning wt., kg5	69.8xy	64.5y	75.1xy	82.6x	5.3	0.04	0.83	0.24
Piglet gain, g/d	251	244	212	242	12.4	0.11	0.37	0.14
Litter gain, g/d	2,615	2,582	2,831	2,919	207.2	0.20	0.90	0.77

¹Sows were weighed 1 d prior to expected farrowing date.

²Sows were weighed within 24 h of completing farrowing.

³Total litter birth weight before cross-fostering.

⁴Total litter weight of live pigs after cross-fostering.

⁵Total litter weaning weight after cross-fostering.

^a,bMeans within a row with different superscripts differ (P < 0.05).

^x,yMeans within a row with different superscripts differ (P < 0.10).