Evaluation of an automated temperature control equipment for lactating sows

Q3 Agricultural and Biological Sciences
Renato Mattos Fernandes, Maria Luiza dos Santos Maciel, A. V. Souza, L. G. Amaral, N. Amaral
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Abstract

The present study aimed to develop and evaluate an automated cooling control system (ATCE) for sows in the farrowing phase. The experiment was conducted at the Swine Production Unit, Federal Institute of Education, Science and Technology, Campus Machado, Machado, state of Minas Gerais. Sixteen sows and their offspring were evaluated, eight treated and eight controls, in a randomized block design, with eight replications. Surface temperature, body temperature and respiratory rate of the animals were evaluated, in addition to floor temperature and performance parameters. The use of ATCE decreased the floor temperature (12h) and neck temperature (12 and 16h) (p < 0.10). In addition, there was a reduction in rectal temperature (12h) and respiratory rate (12 and 16h) in ATCE animals (p < 0.10). No significant differences were detected in the coefficient of variation (CV) of birth weight, but at weaning the CV of piglet weight was 26.3% lower in animals subjected to the ATCE (p = 0.079). Furthermore, the difference in CV between birth and weaning was also lower with the use of ATCE (p = 0.015). It can be concluded that the use of ATCE has a positive influence on the thermal comfort of females, in addition to improving litter uniformity.
泌乳母猪自动温度控制装置的评价
本研究旨在开发和评估一种用于母猪产仔阶段的自动冷却控制系统(ATCE)。实验在米纳斯吉拉斯州马查多校区联邦教育、科学和技术研究所养猪部门进行。采用随机区组设计,对16头母猪及其后代进行评估,其中8头接受治疗,8头作为对照,共8个重复。测定各组动物的体表温度、体温和呼吸频率,以及地板温度和生产性能参数。ATCE的使用降低了地板温度(12h)和颈部温度(12和16h) (p < 0.10)。此外,ATCE动物的直肠温度(12h)和呼吸频率(12和16h)均降低(p < 0.10)。各组仔猪出生体重变异系数(CV)无显著差异,但断奶时ATCE组仔猪体重变异系数降低26.3% (p = 0.079)。此外,ATCE的使用也降低了出生和断奶之间的CV差异(p = 0.015)。综上所述,ATCE的使用除了改善凋落物均匀性外,对母羊的热舒适也有积极的影响。
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来源期刊
Acta Scientiarum. Animal Sciences
Acta Scientiarum. Animal Sciences Agricultural and Biological Sciences-Food Science
CiteScore
1.60
自引率
0.00%
发文量
45
审稿时长
9 weeks
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