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Effect of diurnally fluctuating high ambient temperatures on performance and feeding behaviour of multiparous lactating sows

Published online by Cambridge University Press:  18 August 2016

N. Quiniou ,
D. Renaudeau ,
S. Dubois  and
J. Noblet
N. Quiniou*
Affiliation:
Institut National de la Recherche Agronomique, 35690 Saint-Gilles, France
D. Renaudeau
Affiliation:
Institut National de la Recherche Agronomique, 35690 Saint-Gilles, France
S. Dubois
Affiliation:
Institut National de la Recherche Agronomique, 35690 Saint-Gilles, France
*
† On leave from Institut Technique du Porc, BP 3, 35651 Le Rheu, France.
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Abstract

Forty-two multiparous Large White sows were used to investigate the effect of diurnally fluctuating temperature (T) on lactation performance and feeding behaviour. The animals were allocated to one of the four thermic treatments: constant T at 25°C (25C) and 29°C (29C) or equal-mean diurnal cyclic T varying from 21 to 29°C (25V) and from 25 to 33°C (29V). Photoperiod was fixed to 14 h of light. The sows were given food ad libitum between the 7th and the 19th day post partům. Lactation performance was measured for all sows whereas the feeding behaviour was recorded only on 28 sows. The ad libitum food intake was comparable at 25C and 25V (6•31 kg/day) as were milk production and body reserves mobilization. In contrast, food intake at 29V was higher than at 29C (4•53 v. 3•48 kg/day) with no difference in milk production between the two treatments. The increased daily food intake at 29V resulted from higher intakes over the coolest periods of the day and especially during the dark period. Neither meal size nor daily number of meals were significantly affected by T. Feeding behaviour was mainly diurnal but with differences between treatments: 0•90 of total food intake at 29C v. 0•78 at the other three T It appears that the effects of diurnally fluctuating T on lactation performance of sows depend on the mean level of T

Keywords

performancesowstemperature
Type
Research Article
Information
Animal Science , Volume 71 , Issue 3 , December 2000 , pp. 571 - 575
Copyright
Copyright © British Society of Animal Science 2000

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