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Evaluation of Temperature-Humidity Index in a Growing-Finishing Pig Bedding System

机译：育肥猪床上用品系统的温湿度指数评估

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摘要

This paper studies the heat stress conditions imposed onto growing-finishing pigs housed in a naturally ventilated bedding system with rice husk during the four seasons from March 2013 to February 2014.The barn is located at the suburbs of Nanjing, a city at central of Jiangsu, east of China.In the region, the main losses in pig production result from the summer period,characterized by high air temperature and relative humidity.Dry-bulb temperature and relative humidity data were obtained in the interior of building, as well as the external conditions.The hourly temperature-humidity index (THI) was calculated for evaluation of thermal comfort.The analysis shows that indoor average daily temperature across all units ranged from 2.3℃ to34.4℃, and average relative humidity from 49.2％ to 92.9％.The difference between indoor and outdoor temperature during the four seasons ranged between 0.0℃ and 9.0℃, while its mean value equaled to 3.1℃.No significant differences were detected between indoor and outdoor relative humidity levels (P ＞ 0.05).The hourly THI values indoor ranged from 34.7 to 99.5,frequently higher than the desirable range in summer.Animals were exposed to heat stress in10.5％, 31.5％ and 4.6％ of spring, summer and autumn hours, respectively, whereas no heat stress was identified during winter.Pig are more prone to severe heat stress during summer, as the daily maximum hourly values of THI remained higher than the severe heat stress threshold(THI=79) in 66.3％ of the summer days.
机译：本文研究了自2013年3月至2014年2月这四个季节在自然通风的带有稻壳的床上用品系统中育成的猪所受的热应激条件。该谷仓位于江苏省中部城市南京郊区在该地区，主要由于夏季气温高和相对湿度高而导致了养猪生产的主要损失。在建筑物内部以及室内，获得了干球温度和相对湿度数据。通过计算每小时温度-湿度指数（THI）来评估热舒适度。分析显示，所有单位的室内平均日温度在2.3℃至34.4℃之间，平均相对湿度在49.2％至92.9％之间四个季节的室内外温度差在0.0℃至9.0℃之间，平均值为3.1℃。 r和室外相对湿度水平（P＞ 0.05）。室内的每小时THI值介于34.7至99.5之间，通常高于夏季的理想范围。动物在春季分别遭受热应激的10.5％，31.5％和4.6％。夏季分别是夏季和秋季，而冬季没有发现热应激。夏季，由于THI的每日最大每小时小时值仍高于严重热应激阈值（THI = 79），因此猪在夏季更容易出现严重热应激。夏季的66.3％。

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  • 来源
    《Animal environment and welfare》|2015年|34-41|共8页
  • 会议地点 Chongqing(CN)
  • 作者

    Zhongkai Zhou; Zhu Qin; Hui Li; Hongru Gu; Gang Yu; Jie Yang;

  • 作者单位

    Institute of Facilities and Equipment in Agriculture, Jiangsu Academy of Agricultural Science,Nanjing, Jiangsu 210014, China;

    Institute of Facilities and Equipment in Agriculture, Jiangsu Academy of Agricultural Science,Nanjing, Jiangsu 210014, China;

    Institute of Facilities and Equipment in Agriculture, Jiangsu Academy of Agricultural Science,Nanjing, Jiangsu 210014, China;

    Institute of Animal Science, Jiangsu Academy of Agricultural Science, Nanjing, Jiangsu 210014, China;

    Institute of Facilities and Equipment in Agriculture, Jiangsu Academy of Agricultural Science,Nanjing, Jiangsu 210014, China;

    Institute of Animal Science, Jiangsu Academy of Agricultural Science, Nanjing, Jiangsu 210014, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 家畜;
  • 关键词

    Pig barn; heat stress; climate; temperature; relative humidity; welfare;

    机译：猪舍；热应激；气候；温度；相对湿度；福利;

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