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Research note evaporative cooling for increased production of large broiler chickens



Research note evaporative cooling for increased production of large broiler chickens



Poultry Science 68(6): 839-841



Environmental chambers were used to simulate pad and fan evaporative cooling for rearing broilers to heavy weights during hot summer conditions of the southeastern US. Broilers were reared in the chambers from 4 to 9 wk of age. Treatments included 1) constant 21 C with a 10-C dewpoint (positive control), 2) simulating pad and fan evaporative cooling by cycling temperature from 24 to 29 to 24 C once each 24-h period with a dewpoint cycle from 21 to 23 to 21 C, and 3) simulating hot summer conditions by cycling temperature from 24 to 38 to 24 C once each 24-h period with a constant 21 C dewpoint. The objective of the research was to determine if body weight and feed conversion changed as a result of using evaporative cooling when rearing large broilers in high ambient temperatures. Results show that at 6 and 9 wk of age, evaporative cooling improved body weight and feed conversion compared with rearing under typical summer conditions. The constant temperature control treatment group weighed significantly more at 9 wk of age when compared with the other two treatment groups. The use of evaporative cooling can increase body weight and improve feed conversion at both 6 and 9 wk when compared with results of rearing broilers under hot summer conditions.

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Accession: 007748026

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DOI: 10.3382/ps.0680839


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