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Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Proceedings of the Seventh International Symposium, 18-20 May 2005 (Beijing, China) Publication Date 18 May 2005  701P0205.(doi:10.13031/2013.18361)
Authors:   H. Li, H. Xin, Y. Liang
Keywords:   Laying hens, moisture production, vapor pressure deficit, manure belt

Moisture Production rate (MP) from animals and their housing components provide fundamental data for the engineering design of a building environmental control system. MP of a commercial laying hen house with manure belt and tunnel ventilation was measured for a one-year period. The MP values included both latent heat loss of the birds and evaporation of moisture from the feces on manure belt. During the one-year measurement period, MP varied from 1.57 to 11.74 g H2O h-1 kg-1 with housing temperature ranging from 18 to 32 oC. Regression equations were established to predict MP of the commercial layer house over common ranges of outside temperature (-17 to 29oC), RH (30% to 98%), inside temperature (18-32oC), age condition (20- 42 wk and 97-119 wk) and lighting condition (light or dark). Results from this study provide new data for updated standards to be used in design and operation of laying hen houses.

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