Heat and Moisture Production of Poultry and Their Housing Systems: Broilers
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Since 1905, the Department of Agricultural Engineering, now the Department of Agricultural and Biosystems Engineering (ABE), has been a leader in providing engineering solutions to agricultural problems in the United States and the world. The department’s original mission was to mechanize agriculture. That mission has evolved to encompass a global view of the entire food production system–the wise management of natural resources in the production, processing, storage, handling, and use of food fiber and other biological products.
History
In 1905 Agricultural Engineering was recognized as a subdivision of the Department of Agronomy, and in 1907 it was recognized as a unique department. It was renamed the Department of Agricultural and Biosystems Engineering in 1990. The department merged with the Department of Industrial Education and Technology in 2004.
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1905–present
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- Department of Agricultural Engineering (1907–1990)
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- College of Agriculture and Life Sciences (parent college)
- College of Engineering (parent college)
- Department of Industrial Education and Technology, (merged, 2004)
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Abstract
Heat and moisture production rates (HP, MP) of modern broiler chickens (Cobb strain males) raised on litter in commercial production housing were determined from extensive environmental and production data of 20 house–flocks. The flock size was 18,800 birds, with a typical growth period of 56 days. Regression equations were established that predict total, sensible and latent HP of the broiler houses over common ranges of body mass (0.4 to 3.2 kg), house temperature (20 to 32C), relative humidity (30–80%), and photoperiod (light or dark). Specific total HP rate from this study was up to 31% higher than found elsewhere at 0.4 kg body mass, and the difference diminished as mass approached 2.3 kg. Modern broiler houses have reduced MP that presumably resulted from use of nipple drinkers as opposed to trough drinkers on which most of the literature data were based. The new HP and MP data are expected to enhance efficient design and operation of modern broiler housing ventilation systems. The results further confirm the need to systematically update literature HP and MP data for engineering practices.
Comments
Journal Paper No. J-19079 of the Iowa Agriculture and Home Economics Experiment Station, Iowa State University, Project No. 3311. Funding for this study was provided in part by the American Society of Heating, Refrigeration, and Air-conditioning Engineers and is acknowledged with gratitude. Mention of vendor or product names is for presentation clarity and does not imply endorsement by the authors or their affiliations nor exclusion of other suitable products.
This article is from Transactions of the ASAE 44, no. 6 (2001): 1851–1857.