Table 5.

Effects of dietary supplementation with soybean oil, fish oil and corn starch on litter performance of sows

Item	Diet
	SO1	FO1	CS1	SEM	P-value
No. of sows	16	16	18
No. of pigs per litter
Total piglets born2	14.2	14.1	13.9	0.46	0.98
Piglets born alive2	12.0	12.6	13.5	0.41	0.31
Stillbirth2	2.0	1.3	0.4	0.27	0.08
After cross-foster	10.1	9.9	10.4	0.15	0.38
Pigs weaned	9.4	9.8	9.9	0.15	0.34
Piglet mean BW, kg
At birth2	1.3	1.3	1.4	0.23	0.10
After cross-foster	1.6	1.5	1.6	0.05	0.11
On day 10	3.6	3.5	3.6	0.09	0.21
On day 21	6.2	6.2	6.4	0.14	0.20
Litter weight, kg
At birth2	15.9a	16.9a	19.7b	0.55	0.02
After cross-foster	15.9	15.5	16.4	0.61	0.82
On day 10	34.3	34.3	35.4	1.16	0.91
On day 21	58.1	60.8	63.3	1.88	0.52
ADG, g/d
Days 1 to 10	202.2	193.1	197.6	6.60	0.86
Days 11 to 21	230.2	244.7	255.0	8.38	0.48
Days 1 to 21	216.9	220.2	227.7	5.45	0.71
Farrowing duration2, min	341.4a	267.1b	168.1c	17.45	<0.01
Stillbirth rate3, %	13.8a	8.9a	3.2b		<0.01
Preweaning mortality rate3, %	7.4a	1.3b	4.8ab		0.03

¹SO = 3.0%/5.0% soybean oil diet group; FO = 3.0%/5.0% fish oil diet group; CS = 32%/42% corn starch diet group.

²The number of sows in SO, FO, and CS is 20, 20, and 18, respectively.

³Stillbirth rate and preweaning mortality rate were analyzed using the chi-square test.

^a–cMean values with different superscript letters in the same row differ significantly (P < 0.05).