Table 3. Effects of cooling system and drink temperature on sow performance

Item	Coling system				DWT(°C)		SEM	p-value
	AC	CP	SC	MS	LWT	HWT		C	D	C Х D
ADFI (kg/d)
During lactation	5.76a	5.70a	5.26b	5.26b	5.73a	5.26b	0.07	< 0.001	< 0.001	0.973
Weaning to estrus interval (d)	4.75	4.91	5.42	5.67	5.00	5.37	0.38	0.072	0.172	0.966
BW (kg)
d 112	255.8	253.6	256.7	254.7	255.7	254.7	5.96	0.957	0.798	0.989
Weaning	222.7	219.9	223.1	220.5	222.5	220.5	6.09	0.938	0.641	0.988
Loss during lactation	33.1	33.7	33.6	34.3	33.2	34.1	0.76	0.527	0.09	0.933
BF (mm)
d 112	20.7	20.5	20.2	20.8	20.6	20.5	0.37	0.427	0.728	0.284
Weaning	15.9	15.4	14.9	15.4	15.6	15.2	0.39	0.13	0.16	0.467
Loss during lactation	4.83	5.03	5.31	5.36	4.98	5.29	0.23	0.109	0.071	0.892

Means with different superscripts in the same row significantly differ at p<0.05.
DWT, drinking water temperature; AC, air conditioner; CP, cooling pad; SC, snout cooling; MS, mist spray; LWT, low water temperature; HWT, high water temperature; C, cooling system; D, drink temperature; ADFI, average daily feed intake; BW, body weight; BF, backfat thickness.