摘要
本文旨在评价上置冷风管通风模式防暑降温效果。选择两栋牛舍,对照组安装吊扇,试验组安装冷风机-风管系统。分别选取10头成年公牛和10头犊牛作为试验家畜。每天10∶00、14∶00和18∶00时间分别测量环境指标和生理指标,试验周期7天。结果表明:冷风机-风管系统显著提高畜舍内风速(P<0.05),降低畜舍温度(P<0.01);当外界环境温度超过35℃时,试验组最大可以降低5.5℃;与对照组相比,试验组成年公牛和犊牛呼吸速率显著降低14.33和10.44次/min(P<0.01),直肠温度降低0.74和0.51℃(P<0.01),皮温降低1.79和1.83℃(P<0.01);试验组相对湿度、CO2和NH3分别高于对照舍30.21%、14.44%和14.31%,空气质量符合相关行业标准的要求。结论:冷风机-风管系统极显著缓解家畜热应激,在南方肉牛舍降温方面具有极大推广价值。
To investigate the effect of the system of cooling fan-duct on beef cattle barn in South China,2barns were selected randomly with one intalled with ceiling fan（control）and the other installed with cooling fan-duct（treatment）.Ten steers and ten calves were chosen in each barn.All data were measured at 8∶00 14∶00and 18∶00for 7days.The results showed that this system of cooling fan-duct could increase the wind speed significantly（P〈0.05）,and decrease the ambient temperature（P〈0.01）.The greatest decrease was 5.5 ℃in treatment when the ambient temperature outdoor exceeded 35 ℃.Compared with control group,respiration rate of steers and caves in treatment were lower than 14.33 and 10.44 breath per minute（P〈0.01）,rectal temperature of treatment was 0.74 and 0.51 ℃ lower（P〈0.01）,surface temperature of treatment were 1.79 and 1.83 ℃lower（P〈0.01）.The relative humidy,the concentration of NH3 and CO2in the treatment barns were 30.21%14.31%and 14.44% higher than the control barn,but the air quality in the treatment still can meet the requirment of relative industry standards.This system of cooling fan-duct should be installed and used in beef cattle in South China.
出处
《家畜生态学报》
北大核心
2015年第6期69-76,共8页
Journal of Domestic Animal Ecology
基金
国家公益性行业(农业)科研专项(201303145)
关键词
冷风机
纤维风管
肉牛畜舍
降温
热应激
cooling fan
fabric air dispersion
beef cattle barn
cooling
heat stress
