Table 3.

Effects of supplementation with lysozyme during the late gestation and lactation on the performance of sows and piglets¹

	Treatment
Item	Control	LZM 150	LZM 300	SEM	P-value
Sows2
Backfat thickness, mm
Day 85 of gestation	14.56	14.35	14.45	0.29	0.96
Day 100 of gestation	15.72	15.40	15.70	0.31	0.89
Day 1 of lactation	16.06	16.25	16.50	0.32	0.86
Weaning	13.22	13.25	13.80	0.31	0.69
Gestation increase kg	1.50	1.90	2.05	0.14	0.29
Lactation loss kg	2.83	3.00	2.70	0.26	0.89
ADFI3, kg/d	5.26b	5.70a	5.80a	0.06	<0.01
WEI, d	5.14a	4.58b	4.56b	0.10	0.04
BR, %	90.00	95.00	95.00	0.03	0.76
CR, %	76.80	90.00	85.00	0.04	0.34
Litter size
Total born	11.71	11.88	11.94	0.31	0.95
Alive at birth	10.31	10.21	11.00	0.33	0.56
Weakling	0.39	0.15	0.40	0.09	0.46
Stillborn	0.89a	1.10a	0.15b	0.16	0.03
Piglets4
Neonatal weight, kg	1.54	1.57	1.64	0.03	0.39
Weaning weight, kg	6.21	6.39	6.40	0.07	0.34
Diarrhea rate 5 (%)	2.24a	1.67b	1.41b	0.01	0.03

¹LZM 150 = control diet + lysozyme 150 g/t, LZM 300 = control diet + lysozyme 300 g/t. ADFI = average daily feed intake, WEI = weaning-to-estrus interval, BR = rebreeding rate, CR = conception rate.

²Data are means of 20 sows.

³Average daily feed intake during the lactation.

⁴Data are means of 20 litters from 20 sows.

⁵Diarrhea rate = total diarrhea piglets × diarrhea days / [litter size at birth (live) × trial days].

^a,bWithin a row, means with different superscripts are different (P < 0.05).