Agricultural and Biosystems Engineering Publications

Document Type

Article

Publication Date

1997

Journal or Book Title

Applied Engineering in Agriculture

Volume

13

Issue

1

First Page

95

Last Page

99

Research Focus Area(s)

Animal Production Systems Engineering

Abstract

A one-year field study compared the conventional 250W IR heat lamp with an energy-efficient 175W radiant heat lamp for swine farrowing operations. The energy-efficient heat lamp showed a $36 annual cash savings per unit (assuming $0.10/kWh electricity); a 1.2% absolute reduction in piglet mortality from birth to weaning (5.0±0.28% vs. 6.2±0.44%) (P<0.01); a 45% lower lamp failure rate (18±4% vs. 32±3%) (P<0.05); and a slightly higher rate of weight gain for the piglets (217±4 g/day vs. 211±4 g/day) (P>0.05). The possible benefits of using the energy-efficient heat lamp include an annual energy savings of $5,400 and 284 more weaned pigs for a 1,000-sow farrowing operation. The study also revealed circadian patterns of thermoregulatory behavior of the piglets, i.e., higher heat lamp usage during the day and lower at night. Both the frequency and the magnitude of heat lamp usage seemed to depend on heat lamp size and piglet age. Particularly, piglets spent more time under the 175W heat lamp than under the 250W heat lamp, although visits to the heat lamps decreased with piglet age in both instances. The results suggest that to accommodate the progressively decreasing thermal needs of the piglets, a variable-output heat lamp would be more suitable than a constant-output heat lamp. Further research is warranted to quantify the dynamic thermal needs of the piglets during this critical phase of their life cycle.

Comments

This is Journal Paper No. J-16821 of the Iowa Agriculture and Home Economics Experiment Station, Iowa State University, Project No. 3355. Mention of product or company names is for presentation clarity and does not imply endorsement of the product or company by the authors or Iowa State University, or exclusion of other products that may also be suitable

Copyright Owner

American Society of Agricultural Engineers

Language

en

Date Available

December 13, 2012

File Format

application/pdf

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