Two trials were conducted to determine the effect of air velocity on feed a
nd water consumption ata constant temperature of 27 C and a daily cyclic te
mperature of 22-32-22 C. Air velocity over the broilers was <15 or 120 m/mi
n. These temperature and air velocity treatments were arranged in a 2 x 2 f
actorial design in eight environmental chambers, with two replications of e
ach treatment. The air velocity treatments were applied, and total feed and
water consumption and daily patterns of consumption were determined for br
oilers from 21 to 49 d of age. Broilers exposed to the high air velocity co
nsumed less water and more feed, gained more weight, and had an improved fe
ed:gain ratio. The high air velocity had little effect on daily patterns of
feed and water consumption. Both feed and water consumption were depressed
during the peak of the daily cyclic temperature.