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首页> 外文期刊>Tropical Animal Health and Production >Characterization of heat stress affecting the growth performance, blood biochemical profile, and redox status in male and female broilers at market age
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Characterization of heat stress affecting the growth performance, blood biochemical profile, and redox status in male and female broilers at market age

机译：市场时代雄性和女性肉鸡生长性能，血液生化型材和氧化还原状态的热应激特征

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摘要

This study investigated the effects of acute heat stress (HS), sex, and their interaction on growth performance, serum biochemical and redox status in the later stage broilers. Two hundred 38-day-old Ross 308 chicks were allocated in a factorial arrangement of 2 x 2 (temperatures and sexes) with 5 replicates of 10 bird each. Thermoneutral and heat-stressed broilers were raised at 24 +/- 1 degrees C or 32 +/- 1 degrees C from day 38 to 39, respectively. HS decreased the average daily feed intake (ADFI) and average daily gain (ADG) whereas it increased feed conversion ratio (FCR), rectal temperature (RT), and respiratory rate (RR) in broilers exposed to high temperature for 24 h and 48 h. Moreover, RT, RR, serum glucose, and HDL-C levels increased while triglyceride (TG), total superoxide dismutase (T-SOD), and glutathione peroxidase (GPx) decreased in broilers exposed to high temperature for 12 h. Male broilers had higher final body weight (FBW), ADFI, ADG, total protein carbonyl group, and lower FCR and T-SOD than females in HS condition for 24 h and 48 h. Lower RT, serum albumin, HDL-C, activities of T-SOD and GPx were observed when compared with those of males in HS condition for 12 h. There were significant temperature x sex interactive effects on ADFI, ADG, and TG in broilers exposed to high temperature for 24 h and 48 h. The present study suggests that the acute HS negatively affects growth performance which is accompanied by the disorder of serum nutritional metabolism and imbalance of redox status in later stage broilers. Some parameters presented sexual differences that suggested it may be more effective to alleviate the negative effects of HS when broiler producers take into account the gender of broiler.
机译：本研究调查了急性热应激（HS），性别和它们对后期肉鸡中生长性能的影响，血清生化和氧化还原状态的影响。在2 x 2（温度和性别）的因子排列中分配了两百38天的罗斯308雏鸡，每次有5只鸟的重复。热源和热应力的肉鸡分别在24 +/- 1摄氏度或32 +/- 1摄氏度中升高，分别从第38至39天升高。 HS降低了平均每日进料摄入量（ADFI）和平均每日增益（ADG），而饲料转化率（FCR），直肠温度（RT）和暴露于高温24小时和48的呼吸速率（RR）增加H。此外，RT，Rr，血清葡萄糖和HDL-C水平在甘油三酯（Tg）中增加，总超氧化物歧化酶（T-SOD）和谷胱甘肽过氧化物酶（GPX）在暴露于高温12小时的肉鸡中降低。雄性肉鸡的最终体重（FBW），ADFI，ADG，总蛋白质羰基，以及低于HS条件下的FCR和T-SED，24小时和48小时。与HS条件的雄性相比，观察到降低RT，血清白蛋白，HDL-C，T-SOD和GPX的活性。在暴露于高温24小时和48小时的肉鸡中，对ADFI，ADG和TG进行了显着的温度X性互动作用。本研究表明，急性HS对生长性能产生负面影响，伴随着血清营养代谢和后期肉鸡的氧化还原状态的失衡。一些参数提出了性差异，提出了在肉鸡生产者考虑到肉鸡的性别时，减轻HS的负面影响可能更有效。

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