Table 2. Rate of heating after weaning in sows (unit: %)

Classification	Heating rate(7 days)
Classification	Mean±SD
Small farm	85.69±7.50^NS
Large farm	82.17±14.15
Spring	86.63±9.39^a
Summer	84.43±11.60^b
Fall	80.30±13.50^c
Winter	83.66±12.15^b
Average	83.67±11.88

Values with different superscripts are significantly different (p<0.05).
Not significant (p>0.05).