【作者】 韩晶；

【导师】 李保明；

【作者基本信息】 中国农业大学 ， 农业生物环境与能源工程， 2005， 硕士

【摘要】 随着我国养羊业的发展和草原载畜力的下降,舍饲养羊已经成为我国养羊业的发展方向。本文针对我国舍饲养羊的羊舍及运动场的夏季隔热等环境问题,在查阅分析国内外相关参考文献的基础上,根据我国北方地区的气候特点,研究舍饲肉羊夏季遮阳的热湿环境及其对肉羊行为和生理指标的影响。 论文研究以内蒙古赤峰地区规模化种羊场为例,在两个夏季进行了共约60d的现场实验。实验对羊舍和运动场的热湿环境参数进行了测试分析。在此基础上,首次将温室遮阳网用于羊运动场的遮阳降温,分别对遮阳率为70%的普通遮阳网进行双层和四层复合使用、以及架设高度分别为1.80m和2.50m这四种条件下的遮阳效果,及其对羊只行为与生理指标的影响等进行了对比研究。研究结果表明:四层复合遮阳网下的空气温度比双层网下平均低2.5℃,且分布在四层复合遮阳网下的羊只比例多于双层网;高棚内的空气温度比低棚平均低3℃,而高棚内的辐照度平均大于低棚2W/m~2,分布在低棚内的羊只比例大于高棚。无遮阳措施的运动场上的母羊的呼吸频率、直肠温度和毛尖温度等分别比遮阳棚内的羊平均高约50%、0.3℃和10℃。采用遮阳网的措施可以经济有效地解决羊在夏季运动场的防热问题。论文还对进一步的研究提出了建议。更多还原

【Abstract】 With the development of sheep industry and decrease of stocking capacity of the pasture in China, sheep housing system has been becoming its developing trend. Based on the related researches worldwide and considerations on local climate condition in Northern China, the thermal and humidity environment of the outside shading in sheep housing system and its effects on sheep behavior and physiological index were studied, in order to improve the thermal environment of sheep housing and the paddock.Field survey was conducted for about 60 days in two summer seasons in a scaled sheep farm in Chifeng city, Inner Mongolia, Northern China. Thermal and humidity parameters of the housing and paddock were measured and analyzed. Based upon the primary study, the screen with the shading ratio of 70% was used on the paddock as the cooling system. A 2 × 2 experiment was designed by using double and four layers of shading screen, and with the supporting height of i.80m and 2.50m respectively, to study the its effect on the sheep behavior and the physiological index. The results show that air temperature under the shading screen was 2.5 ℃ lower with four layers than with double layers, and the percentage of sheep resting under the former one was also higher. The air temperature under the shading screen with the height of 2.50m was 3 ℃ lower than one with the height of 1.80m, while the radiation density was 2 W/m2 higher, and the less sheep were under it. Comparing with sheep under shading screen, the respiration rate, rectal temperature and wool surface temperature of the sheep on the paddock without any shading measures were 50%, 0.5 ℃ and 10℃ higher respectively. The investigation indicates that the shading screen is an effective way to resolve the problem of high temperature on the paddock for sheep housing system in summer. Advices of further research were given finally in the thesis.更多还原