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开放式牛舍舍内喷雾和屋面喷淋通风降温改善肉牛生产性能 预览 被引量:1

Cooling by interior spraying ventilation and roofing sprinkling ventilation on open beef cattle barn improving production performance of beef cattle
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摘要 为缓解南方夏季高温高湿热应激对肉牛生产性能的影响,探讨不同降温方式对肉牛的降温效果。以江西省地方品种锦江黄牛为试验对象,试验分为3组,每组8头牛,试验1、2和3组分别为舍内通风组、舍内喷雾通风组和屋面喷淋通风组,3个组牛的平均体质量分别为(250.38±24.54)、(247.93±24.54)和(250.00±24.02)kg(P〉0.05),试验于2014年7—8月进行。分别测定了环境温度、湿度,肉牛直肠温度、呼吸频率和日增质量等,结果表明:屋面喷淋运行期间(10:00—18:00),与1组相比,3组舍内距屋顶0、1、2和3 m处温度分别降低4.79(P〈0.01)、2.13、1.37和1.42℃;湿度分别增加9.66%(P〈0.01)、6.76%(P〈0.01)、2.66%和1.80%;在14:00时,距离地面高度1.5和0.5 m分别降低1.20(P〈0.05)和1.07℃;呼吸频率降低12次/min(P〈0.01);直肠温度差异不显著;日增质量提高0.19 kg/d,提高率为26.38%(P〈0.05)。喷雾运行期间14:00时,与1组相比,2组肉牛体感温度喷雾前后分别降低0.51和1.43℃(P〈0.05),在18:00分别下降0.70和1.60℃(P〈0.05);呼吸频率降低13次/min(P〈0.01);直肠温度差异不显著;日增质量提高0.08 kg/d,提高率为11.11%。从以上结果可以看出,喷雾通风和屋面喷淋通风均可以一定程度缓解肉牛的热应激。 In order to relieve the summer heat stress in South on production performance of beef cattle and investigate the effects of different environmental regulation forms, 24 Jinjiang beet cattle were randomly divided into 3 groups, and each group had 8 cattle. Environmental regulation forms of Group 1, Group 2 and Groups 3 were interior ventilation, interior spray ventilation and roof sprinkling ventilation, respectively. The average weight of 3 groups was(250.38±24.54),(247.93±24.54) and(250.00±24.02) kg(P〈0.05), respectively. Experiment was conducted in July and August, 2014. Environment temperature, relative humidity, cattle rectal temperature, breathing rate and daily weight gain were measured. Economic benefits of interior spray ventilation and roof sprinkling ventilation were analyzed. The results showed that compared with Group 1, during running time(between10:00 and 18:00) for the roof sprinkling ventilation, the temperature at 0, 1, 2 and 3m under the roof decreased by 4.79(P〈0.01), 2.13(P〈0.01), 1.37 and 1.42 ℃, respectively; the relative humidity increased by 9.66%(P〈0.01), 6.76%(P〈0.01), 2.66% and 1.80%; respectively; the temperature of 1.5 and 0.5 m from the ground decreased by 1.2(P〈0.05) and 1.07 ℃, respectively at 14:00; the dry-bulb temperature and relative humidity from the ground were(33.61±1.55) ℃ and 61.23%±4.03%, respectively, while those of Group 1 were(35.28±1.62) ℃ and 56.43%±3.62%, respectively. Compared with Group 1, the temperature of Group 3 decreased by 1.67 ℃(P〈0.01), but the relative humidity increased by 4.80%(P〈0.05). The dry-bulb temperature and relative humidity of Group 2 before spray ventilation were(34.58±1.73) ℃ and 57.34%±4.25%. The temperature and relative humidity of Group 2 after spray ventilation were(32.03±1.85) ℃ and 67.65%±5.65%. Compared with Group 1, the temperature of Group 2 before and after spray decreased by 0.70 and 3.25 ℃(P〈0.01), respectively, b
作者 吴武平 李川 吴华东 黄爱民 张泳桢 杨食堂 舒邓群 Wu Wuping, Li Chuan, Wu Huadong, Huang Aimin, Zhang Yongzhen, Yang Shitang, Shu Dengqun(1. College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; 2. Jiangxi Gao 'an Yufeng Agricultural and Livestock Co. Ltd, Yichun 330800, China)
出处 《农业工程学报》 EI CAS CSCD 北大核心 2016年第10期187-193,共7页 Transactions of the Chinese Society of Agricultural Engineering
基金 公益性行业(农业)科研专项经费项目(201303145)资助
关键词 风机 喷雾 降温 肉牛 屋面喷淋 温热环境 fans spraying cooling beef cattle roofing sprinkle thermal environment
作者简介 吴武平,男,江西上饶人,研究方向为家畜环境与生态。南昌江西农业大学动物科学技术学院,330045。Email:916480753@qq.com 通信作者:舒邓群,男,江西南昌人,博士,教授,硕士生导师,主要从事家畜环境与生态的研究。南昌江西农业大学动物科学技术学院,330045。Email:sudengq@163.com
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