EFFECT OF FOGGERS ON MICROCLIMATIC CHANGES AND PHYSIOLOGICAL RESPONSES OF MEHSANA BUFFALOES IN SUMMER SEASON

Abstract

The trial was conducted during hot dry season when the average maximum
temperature was 38.54°C (36.60 to 40.20°C) and relative humidity was 53.45% (46.00 to
60.00%) at Livestock Research Station, S.D.A.U, Sardarkrushinagar. The average dry bulb
temperature decreased by 0.19°C and relative humidity increased by 2 - 2.5 % due to
cooling effects of foggers at afternoon hours in experimental shed. The animals were divided
into two groups of six each. Buffaloes of Group I were kept under loose housing without
foggers (control), while buffaloes of group II were kept under loose housing with foggers
(experimental). The foggers were operated daily during hot hours from 12:00 to 15:00 p.m. in
experimental shed. The fogger cooling system was automatically controlled by an electronic
timer and run for 3 min after an interval of every 2 min (36 min/hour) from 12:00 to 15:00
hours. The mean values of physiological responses for rectal temperature, respiration rate
and pulse rate of both the groups were not different during morning but varied (P<0.01) in
the afternoon. Water cooling through foggers played important role in body comfort of animal
which is evident from the lower rectal temperature, respiration rate and pulse rate of
Mehsana buffaloes in experimental shed by 0.55°F, 4.56 counts/minute and 5.62 beats/
minute, respectively at the peak hot period of afternoon hours.