Table 3. Comparative performance on activity volume1) in lactating dairy cows when changing of light intensity
Item | Control | T1 | T2 | T3 | SEM | p-value |
Neck part | 2,904.7a | 2,171.3ab | 1,553.3bc | 1,154.4c | 180.7 | 0.002 |
Thurl part | 161.0b | 370.8a | 361.8a | 118.4b | 26.1 | 0.001 |
Control, natural photoperiod; T1, LDPP (day : night = 16 : 8 h) with 50 Lux of the light intensity; T2, LDPP with 100 Lux; T3, LDPP with 200 Lux.
Activity volume (unit) was counted using pedometer from 09:00 to 18:00 daily.
Denotes comparison made within rows (p < 0.05).