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              夏季皖東牛在水泥地面木床發酵床上的體溫調節反應特征

              時間:2019-07-20 22:27來源:畢業論文
              夏季皖東牛在水泥地面、木床、發酵床上均可以通過生理和行為調節維持機體產熱與散熱的平衡。但是夏季使用發酵床可保障休息,增大體溫調節反應強度,木床依賴站立散熱,影響休

              摘要:本試驗旨在剖析夏季皖東牛在熱應激狀態下在水泥地面、木床、發酵床上的生理指標和維持行為,以期評價三種不同飼養條件利弊。試驗選取12頭體重相似的皖東牛,分成三組,每組4頭。試驗期間于每天的8:00、14:00分別測定環境與肉牛的生理指標。試驗期間對皖東牛進行全天錄像,之后進行行為觀察。結果顯示:不同飼養模式環境溫度相近,但發酵床、木板地面的相對濕度顯著高于水泥地面組,溫濕指數增加(p<0.05);發酵床組肉牛的呼吸數、皮溫和直腸溫度顯著高于水泥地面組和木板地面組(p<0.05);在24小時內肉牛在發酵床和水泥地面上的趴臥時間分別高于木床250和227min/d(p<0.01);而在木床的站立時間顯著高于發酵床和水泥地面,分別高出250和217.5min/d(p<0.01);發酵床組和水泥地面組上無論趴臥時間還是站立、行走時間均無顯著差異。綜上所述,夏季皖東牛在水泥地面、木床、發酵床上均可以通過生理和行為調節維持機體產熱與散熱的平衡。但是夏季使用發酵床可保障休息,增大體溫調節反應強度,木床依賴站立散熱,影響休息時間。發酵床和水泥地面組合可給肉牛提供不同選項,改善環境豐富度。37288
              畢業論文關鍵詞:高溫;熱應激;發酵床;溫度
              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. 源`自^六;維'論.文;網www.kj9998.cn
              Keywords: High temperature; Heat stress; Fermentation bed; Temperature;
              目  錄
              摘要1
              關鍵詞1
              Abstract1
              Key words1
              引言1
              1 材料與方法2
              1.1 試驗材料2
              1.1.1 實驗地點2
              1.1.2 實驗時間2
              1.1.3 畜舍尺寸3
              1.1.4 牛床墊料3
              1.1.5 日常管理3 夏季皖東牛在水泥地面木床發酵床上的體溫調節反應特征:http://www.kj9998.cn/shengwu/20190720/36022.html
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