Effects of Hot and Humid Environment on Feeding Behavior in Growing-Finishing Pigs with Ad Libitum Feeding

PU Hongzhou, CHEN Lei, ZHANG Lijuan, ZHANG Fengming, ZHANG Liang, GUO Zongyi, WANG Jinyong

doi:10.3969/j.issn.1006-267x.2015.05.006

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 5: 1370 - 1376

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.05.006

Swine Nutrition

Effects of Hot and Humid Environment on Feeding Behavior in Growing-Finishing Pigs with Ad Libitum Feeding

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1. Chongqing Academy of Animal Sciences, Chongqing 402460, China;
2. Key Laboratory of Pig Industry Sciences, Ministry of Agriculture, Chongqing 402460, China;
3. Chongqing Engineering Research Center for Swine, Chongqing 402460, China

Received date: 2014-12-23

Online published: 2015-05-13

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Abstract

This experiment was conducted to investigate the effects of hot and humid environment on feeding behavior in growing-finishing pigs with ad libitum feeding. A total of 117 healthy pigs with an average bodyweight of (30.26±2.19) kg were randomly divided into 9 measuring stations. The feeding behavior, temperature and relative humility were recorded by the automatic pig production performance measurement system, and automatic temperature and humidity recorder, respectively. The results showed as follows: the feeding behavior showed a circadian rhythm under hot and humid conditions. The feed intake, feed times, feed time during 2 periods of 06:00—09:00 and 15:00—19:00 were significantly higher than those during 21:00—04:00 (P<0.05), more than 52% of the feeding behavior occurred in these 2 periods. The feeding time and feed intake per unit of body weight in growing-finishing pigs were significantly affected by temperature, relative humility and their interaction (P<0.01). The increased of temperature humidity index could significantly decreased feed intake per body weight (P<0.05). In conclusion, the feeding behavior in growing-finishing pigs is significantly affects by hot and humid environment with a circadian rhythm.

Key words： hot and humid environment; ad libitum feeding; growing-finishing pigs; feed behavior; THI

Cite this article

PU Hongzhou, CHEN Lei, ZHANG Lijuan, ZHANG Fengming, ZHANG Liang, GUO Zongyi, WANG Jinyong . Effects of Hot and Humid Environment on Feeding Behavior in Growing-Finishing Pigs with Ad Libitum Feeding[J]. Chinese Journal of Animal Nutrition, 2015 , 27(5) : 1370 -1376 . DOI: 10.3969/j.issn.1006-267x.2015.05.006

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