Table 2. Environmental conditions during the experimental periods

Item	Precalving1)	Postcalving2)	SEM	p-value
Daily Ta (°C)
Maximum	27.26	32.50	0.32	< 0.001
Minimum	17.98	21.67	0.25	< 0.001
Average	22.37	26.02	0.24	< 0.001
Daily RH (%)
Maximum	97.09	98.65	0.30	0.010
Minimum	56.61	56.11	1.00	0.805
Average	79.59	82.01	0.63	0.055
Daily THI
Maximum	75.87	82.62	0.39	< 0.001
Minimum	64.34	70.99	0.44	< 0.001
Average	70.30	76.22	0.39	< 0.001

Precalving was defined as the last 8 weeks before the actual calving date.
Postcalving was defined as the first 10 weeks after the actual calving date.
Ta, air temperature; RH, relative humidity; THI, temperature and humidity index.