Test period

Effect

P1

P2

P

A

P × A

Environment

Ta (˚C)

20.12 (2.02) O.n = 359

37.35 (2.33) O.n = 359

-

-

-

RH (%)

57.70 (0.07) O.n = 358

31.25 (0.03) O.n = 356

-

-

-

THI

65.62 (2.43)

83.27 (1.90)

-

-

-

Parameters

RT (˚C)

38.15 (0.07)a O.n = 2155

39.2 (0.08)b O.n = 2160

^***

ns

ns

HR (Beat./min)

61.95 (1.22)a O.n = 1629

78.05 (1.25)b O.n = 1637

^***

ns

^*

RR (Insp./min)

43.75 (1.21)a O.n = 1620

79.4 (1.24)b O.n = 1637

^***

ns

ns

DMI (kg/DM/day)

22.31 (0.63)a O.n = 720

20 (0.75)b O.n = 719

^***

ns

^*

Digestibility (% of DM)

66 (0.22)a O.n = 720

69.5 (0.24)b O.n = 718

^***

^*

^**

MY (kg/day)

29.85 (1.02)a O.n = 720

24.26 (1.7)b O.n = 720

^***

^***

^*

VC (mg/l)

2.96 (0.01)a O.n = 720

1.79 (0.02)b O.n = 720

^***

ns

ns