夏季皖东牛在水泥地面木床发酵床上的体温调节反应特征
毕业论文关键词：高温；热应激；发酵床；温度
The characteristics of thermoregulation reaction of Wandong cattles on cement ground, wooden bed and fermentation bed in summer
Abstract: This experiment was conducted to investigate the physiological index and maintenance behavior of Wandong Cattle in the state of heat stress on the cement ground, wooden bed and fermentation bed, in order to evaluate the advantages and disadvantages of these three different feeding conditions. In the experiment ,12 Wandong cattles with similar weight were pided into three groups, and 4 cattles in each group. During the experiment, the environment indexes and the physiological indexes were determined at 8:00 and 14:00 everyday. During the experiment, videos of Wandong cattles were taken for all day long to observe behaviors. The results showed that the environment temperature of different feeding patterns are similar , but the relative humidity of fermentation bed and wood surface were significantly higher than that of the cement ground group, hydrothermal index was increased (P < 0.05); the respiratory number, skin temperature and rectal temperature of cattles in fermentation bed group were significantly higher than those of cattles in the cement ground group and board group (P < 0.05); the lying time in 24 hours of cattles in fermentation bed group and cement ground group were 250 and 270min/d significantly longer than that of wooden bed group (P < 0.01); and the standing and walking time of cattles in wooden bed group was 250 and 217.5 min/d significantly longer than those of fermentation bed and cement ground (P < 0.01);whereas the lying time, standing time or the walking time of cattles in fermentation bed group and cement ground group was not significant different . In conclusion, Wandong cattle on the cement floor, wooden bed and fermentation bed all can maintain the balance between heat production and dissipation through physiological and behavioral manner. But using fermentation bed in summer can ensure rest time and improve the thermoregulation reaction strength.Using wooden bed needs to dissipate heat by standing,which influence the rest time.Using fermentation bed and cement ground assembly can offer different options to cattles and increase the richness of the environment.
Keywords: High temperature; Heat stress; Fermentation bed; Temperature;
目 录
摘要1
关键词1
Abstract1
Key words1
引言1
1 材料与方法2
1.1 试验材料2
1.1.1 实验地点2
1.1.2 实验时间2
1.1.3 畜舍尺寸3
1.1.4 牛床垫料3
1.1.5 日常管理3
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