宁夏地区育肥牛舍温湿度对安格斯牛血清指标的影响
Effect of temperature and humidity on serum indices of angus cattle in Ningxia
施安 1王建东 1孙文阳 1陈志龙 2王瑞刚 3姜武 3侯鹏霞1
作者信息
- 1. 宁夏农林科学院动物科学研究所,宁夏银川 750002
- 2. 宁夏农林科学院固原分院,宁夏固原 756099
- 3. 宁夏犇旺生态农业有限公司,宁夏永宁 750100
- 折叠
摘要
为研究宁夏地区四季典型温湿度对安格斯育肥牛血清生化、免疫、抗氧化和内分泌激素指标的影响,选择体重相近的安格斯育肥牛16头,同一圈舍群饲,监测养殖场全年温度和湿度,计算温湿指数(THI).试验根据THI值设置对照期、冷应激期和热应激期3个阶段,跟踪采集血样测定相应指标.结果表明:全年THI监测显示夏季六、七、八月份属于轻度热应激,冬季一、二月份属于轻度冷应激,其余月份处于舒适区;血清生化、免疫及抗氧化指标,冷应激期总蛋白(TP)、白蛋白(ALB)、尿素氮(BUN)、葡萄糖(GLU),免疫球蛋白A(IgA)、免疫球蛋白G(IgG)、免疫球蛋白M(IgM)、白细胞介素-2(IL-2)、白细胞介素-4(IL-4),总抗氧化能力(T-AOC)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)含量极显著高于热应激期(P＜0.01),丙二醛(MDA)含量极显著低于热应激期(P＜0.01);血清内分泌激素水平,促肾上腺皮质激素(ACTH)含量冷应激期＜对照期＜热应激期(P＜0.01),生长激素(GH)含量冷应激期极显著高于对照期和热应激期(P＜0.01),甲状腺素(T4)含量对照期显著高于热应激期(P＜0.05).综上,慢性冷热应激均会不同程度的影响育肥牛生化、免疫、抗氧化能力以及激素分泌水平,造成肉牛生长发育损伤.
Abstract
The experiment was conducted to study the effects of typical temperature and humidity in four seasons on serum biochemical,immune,antioxidant and endocrine hormone indexes of Angus cattle in Ningxia.Sixteen Angus fattening cattle with similar body weight were selected and fed in the same enclosure.THI was calculated by monitoring the temperature and humidity of the farm throughout the year.According to the THI value,the control period,cold stress period and heat stress period were set up,and blood samples were collected to determine the corresponding indicators.The annual THI monitoring showed that summer at June,July and August belonged to mild heat stress,winter at January and February belonged to mild cold stress,and the rest months were in the comfort zone.In terms of serum biochemical,immune and antioxidant indexes,total protein(TP),albumin(ALB),urea nitrogen(BUN),glucose(GLU),immunoglobulin A(IgA),immunoglobulin G(IgG),immunoglobulin M(IgM),interleukin-2(IL-2),interleukin-4(IL-4),total antioxidant capacity(T-AOC),superoxide dismutase(SOD)and glutathione peroxidase(GSH-PX)contents in cold stress period were significantly higher than those in heat stress period(P＜0.01).Malondialdehyde(MDA)content was significantly lower than that in heat stress period(P＜0.01).In terms of serum endocrine hormone,adrendcorticotropic hormone(ACTH)content in cold stress period＜control period＜heat stress period(P＜0.01),growth hormone(GH)content in cold stress period was significantly higher than that in control period and heat stress period(P＜0.01),thyroxine(T4)content in control period was significantly higher than that in heat stress period(P＜0.05).In conclusion that chronic cold and heat stress could affect the biochemical,immune,antioxidant capacity and hormone secretion level in different degrees and resulting in growth and development damage of cattle.
关键词
安格斯牛/育肥牛舍/温湿指数/冷应激/热应激Key words
Angus cattle/fattening cowshed/temperature humidity index/cold stress/heat stress引用本文复制引用
基金项目
宁夏回族自治区农业科技自主创新项目(NGSB-2021-12-02)
出版年
2024
NETL
NSTL
万方数据