Abstract

TOFFOLI, G.D et al. MITIGACIÓN DEL ESTRÉS CALÓRICO DURANTE EL PREPARTO  EN VACAS LECHERAS. FAVE. Secc. Cienc. agrar. [online]. 2016, vol.15, n.2. ISSN 1666-7719.

  Thirty cows in prepartum who stayed in a dry pen with access to artificial shadows were used. The cows were divided into two groups: unrefrigerated (TS) and refrigeration (TR) in the feeder sector. At the start of the trial at 25 days it was evaluated weight and body condition. Twice a week and times of day four respiratory rate was measured. Twice a week the behavior was recorded the data analyzed with T Student and chi square. Weight and body condition showed no significant difference .It observed a treatment effect on the day and time for the respiratory rate (p <0.0001). The behavior of standing in the shadow was the highest in TS 27% and 29% in TR. There were no statistical differences in milk production between treatments in the sun and chilled which was 31,4 l /v/d and 30,6 l /v/d. respectively

Keywords : behavior; respiratory rate; milk production.