
Agricultural and Biosystems Engineering Publications
Document Type
Article
Publication Version
Published Version
Publication Date
2011
Journal or Book Title
Transactions of the ASABE
Volume
54
Issue
4
First Page
1491
Last Page
1493
Abstract
This study was conducted to quantify heat and moisture production (HMP) of W-36 laying hens in their prime laying phase (27 to 33 weeks of age) using four large-scale indirect animal calorimeters. Two experiments were conducted involving two groups of hens. The hens were exposed to conditions of 24°C to 27°C and concomitant relative humidity (RH) of 45% to 65% for six weeks. In each experiment, a total of 216 laying hens were used, with 54 hens housed in each of the four calorimeters at the cage stocking density of 435 cm2 hen-1 (67 in.2 hen-1) that was typical of industry practice. Total heat production (THP), room-level latent heat production (LHP), and room-level sensible heat production (SHP) were expressed as daily time-weighted average (TWA), with an average of 16 h light and 8 h dark. The results showed that HMP was similar for the 24°C to 27°C temperature range. THP, LHP, and SHP, in W kg-1 (mean ±SE) were, respectively, 6.1 ±0.3, 2.3 ±0.2, and 3.8 ±0.1 for the daily TWA; 6.5 ±0.3, 2.4 ±0.2, and 4.1 ±0.1 for the light period; and 5.4 ±0.3, 2.2 ±0.2, and 3.2 ±0.1 for the dark period. The HMP data contribute to the design and operation of ventilation systems in modern laying hen housing.
Access
Open
Copyright Owner
American Society of Agricultural and Biological Engineers
Copyright Date
2011
Language
en
File Format
application/pdf
Recommended Citation
Chepete, H. Justin; Xin, Hongwei; Mendes, Luciano B.; and Li, Hong, "Technical Note: Heat and Moisture Production of W-36 Laying Hens at 24°C to 27°C Temperature Conditions" (2011). Agricultural and Biosystems Engineering Publications. 193.
https://lib.dr.iastate.edu/abe_eng_pubs/193
Comments
This article is from Transactions of the ASABE 54, no. 4 (2011): 1491–1493.