Agricultural and Biosystems Engineering Publications

Document Type

Article

Publication Date

1997

Journal or Book Title

Transactions of the ASAE

Volume

40

Issue

6

First Page

1693

Last Page

1698

Research Focus Area(s)

Animal Production Systems Engineering

Abstract

The energetics of early weaned (13 to 16 days old) pigs were examined under four temperature regimes. The pigs, in groups of 10 (0.28 m2/pig), were housed in the indirect calorimeter chambers at initial air temperatures of 31.1, 28.9, 26.7, or 24.4°C which then were decreased by 1.1°C per week for the three weeks of the post-weaning period. The feed efficiency and average daily gain during the three-week trial for the four temperature regimes were 1.30, 360 g/day; 1.33, 380 g/day; 1.38, 370 g/day; and 1.27, 370 g/day, respectively. Overall feed efficiency was significantly lower (P < 0.05) for the coolest and warmest treatments. Average daily gain was not significantly different for any of the treatments (P > 0.05). The average moisture production for the four treatments was: 4.85, 4.26, 4.13, and 3.85 g H2O/kg-h, respectively. The total heat production and sensible heat loss were: 5.53, 2.21; 5.66, 2.71; 5.83, 3.01; and 5.87, 3.22 W/kg, respectively. Respiratory quotient averaged 0.95 to 0.96 for all regimes. All average energetic responses, except respiratory quotient, had significant differences among treatments (P < 0.05). Energetic responses of this study were substantially higher than data currently used by the ASAE Standard for swine nursery design.

Comments

Journal Paper No. J-17292 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa, Project No. 3355, and supported by Hatch Act and State of Iowa Funds. Mention of company or product names is for presentation clarity, and does not imply endorsement by the authors or Iowa State University; nor exclusion of any other products that may also be suitable for application.

This article is from Transactions of the ASAE 40, no. 6 (1997): 1693–1698.

Copyright Owner

American Society of Agricultural Engineers

Language

en

File Format

application/pdf

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