环境热应激对埃及荷斯坦奶牛繁殖性能的影响

IF 1 4区生物学 Q3 BIOLOGY

Biological Rhythm Research Pub Date : 2023-10-17 DOI:10.1080/09291016.2023.2267953

Abdelrahman A. Kilany, Abdel-Halim A. El-Darawany, Akram A. EL-Tarabany, Khaled M. Al-Marakby

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引用次数: 0

摘要

摘要目的研究环境温湿度指数(THI)对亚热带地区920头荷斯坦奶牛生殖指标的影响。THI分为以下几类:低于70;中等:70 - 75，高:75以上。高THI显著(P < 0.001)延长了产犊间隔、开、干期天数，提高了单胎受胎率。高THI组受孕率(17.31%)显著低于低THI组(36.96%)和中等THI组(31.61%)，差异有统计学意义(P < 0.001)。高THI组胚胎丢失率(P < 0.001)和流产率(P=0.043)显著高于低THI组(14.62%和8.89%);分别为)和中度(22.84%;和11.17%;分别)THI组。高THI组胚胎损失显著高于其他组(P=0.001)。综上所述，THI超过75会使荷斯坦奶牛的生殖指标恶化。作者感谢埃及Sharkia省新Salhiya El Salhiya投资开发公司奶牛场(2站)经理Mohammed Abdel-Hameed博士及其团队在本研究中的合作。作者贡献sabdelrahman Kilany:数据收集，分析和MS起草。Abdel-Halim El-Darawany:数据收集，分析和MS起草。Akram El-Tarabany:数据收集，分析和MS起草。Khaled Al-Marakby:数据收集，分析和MS起草。披露声明作者未报告潜在的利益冲突。数据可用性声明本研究过程中产生或分析的所有数据均包含在本已发表的论文中。伦理审批本工作已按照埃及原子能机构动物保护和福利委员会的标准操作程序进行了审查和批准。

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Effect of environmental thermal stress on reproductive performance of Holstein cows in Egypt

ABSTRACTThe aim was to investigate effects of ambient temperature-humidity index (THI) on the reproductive indices of 920 Holstein (HO) cows in the subtropics. THI was categorized as low: below 70; moderate: from 70 to 75 and high: more than 75. The high THI significantly (P < 0.001) prolonged the periods of calving interval, days open and dry period, and increased the service per conception rate. The conception rate in the high THI group (17.31%) was significantly (P < 0.001) lower than that noticed in both low (36.96%) and moderate THI (31.61%) groups. Meanwhile, high THI significantly increased the embryonic loss (P < 0.001) and abortion (P=0.043) rates compared with low (14.62% and 8.89%; respectively) and moderate (22.84%; and 11.17%; respectively) THI groups. The high THI group had a significantly (P=0.001) greater embryonic losses than the other groups. Conclusively, THI over 75 deteriorates the reproductive indices of Holstein cows.KEYWORDS: Holsteinheat stressTHIreproductive indices AcknowledgmentsThe authors are grateful to Dr Mohammed Abdel-Hameed, the dairy farm (station 2) manager, El Salhiya Company for investment and development, New Salhiya, Sharkia governorate, Egypt, and his team for their cooperation in this study.Authors contributionsAbdelrahman Kilany: data collection, analysis and MS drafting. Abdel-Halim El-Darawany: data collection, analysis and MS drafting. Akram El-Tarabany: data collection, analysis and MS drafting. Khaled Al-Marakby: data collection, analysis and MS drafting.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementAll data generated or analyzed during this study are included in this published paperEthical approvalThis work was reviewed and approved by the Animal Care and Welfare Committee of Egyptian Atomic Energy Authority standard operating procedures.

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来源期刊

Biological Rhythm Research 生物-生理学

CiteScore

3.00

自引率

9.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The principal aim of Biological Rhythm Research is to cover any aspect of research into the broad topic of biological rhythms. The area covered can range from studies at the genetic or molecular level to those of behavioural or clinical topics. It can also include ultradian, circadian, infradian or annual rhythms. In this way, the Editorial Board tries to stimulate interdisciplinary rhythm research. Such an aim reflects not only the similarity of the methods used in different fields of chronobiology, but also the fact that many influences that exert controlling or masking effects are common. Amongst the controlling factors, attention is paid to the effects of climate change on living organisms. So, papers dealing with biometeorological aspects can also be submitted. The Journal publishes original scientific research papers, review papers, short notes on research in progress, book reviews and summaries of activities, symposia and congresses of national and international organizations dealing with rhythmic phenomena.