摘要
为了研究西南地区夏季热应激对肉兔生理生化指标的影响,本试验选择8只健康肉兔,分别测定非热应激期和热应激期兔舍环境温度和相对湿度,并测定试验肉兔血清中生理生化指标。结果表明:(1)热应激期试验肉兔的直肠温度、耳根温度、尾根温度和呼吸频率均极显著高于非热应激期(P<0.01),颈部温度显著高于非热应激期(P<0.05);(2)与非热应激期相比,热应激期肉兔血清中三碘甲状腺原氨酸(T_3)含量差异不显著(P>0.05),甲状腺素(T_4)含量在第30天显著降低(P<0.05),皮质醇(COR)含量极显著增加(P<0.01),热休克蛋白70(HSP70)含量显著增加(P<0.05),丙二醛(MDA)含量在第1天升高而后逐渐恢复正常(P>0.05)。这表明夏季高温高湿环境诱发了肉兔的热应激反应,热应激肉兔表现为直肠温度、耳根温度、颈部温度、尾根温度及呼吸频率升高,内分泌系统紊乱,抗氧化能力降低。
This study is conducted to investigate the effects of summer heat stress on physiological and serum biochemical indices of beef cattle in southwest China.Eight meat rabbit were fed in normal and heat stress conditions.During the trials,temperature and relative humidity of rabbit house were determined.The serum samples of meat rabbit were collected,and then physiological and serum biochemical indices of meat rabbit were determined.The results show as follows:(1)rectal temperature,ear root temperature,tail root temperature and breathing frequency of meat rabbit in heat stress are extremely higher than those in normal period(P<0.01),neck temperature is significantly higher than those in normal period(P<0.05);(2)Compared with normal period,triiodothyronine(T 3)content in serum is not changed(P>0.05),but thyroxine(T 4)content is significantly lower on the 30th day(P<0.05),cortisol(COR)content is extremely increased(P<0.01),heat shock protein 70(HSP70)content is significantly increased(P<0.05),malondialdehyde(MDA)content is increased on the first day and then gradually recovered to normal(P>0.05).These results indicate that high temperature and high humidity induce heat stress of meat rabbit,and heat stress can enhance the rectal temperature,ear root temperature,neck temperature,tail root temperature and breathing frequency,disorder endocrine and reduce antioxidant ability.
作者
彭津津
PENG Jinjin(Chongqing Three Gorges Vocational College,Wanzhou,Chongqing 404155,China)
出处
《家畜生态学报》
北大核心
2019年第2期36-39,共4页
Journal of Domestic Animal Ecology
基金
重庆市教委科学技术研究项目(KJ1733443
关键词
热应激
肉兔
直肠温度
血清生化指标
heat stress
meat rabbit
rectal temperature
serum biochemical indices
