The influence of LED lighting on the physiology and behaviour of broiler chickens

LED照明对肉鸡生理和行为的影响

• 批准号: RGPIN-2016-05671
• 负责人: SchweanLardner, Karen
• 金额: $ 2.04万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=709860
• 关键词: influence; LED; lighting; physiology; behaviour

Poultry management can have significant impacts on bird production and welfare. My previous research has focused on a number of management practices, including the use of lighting programs (daylength). This work has now been implemented world-wide to improve bird welfare and productivity. In 2014, Natural Resources Canada legislated a ban on incandescent bulbs, commonly used in poultry barns. Light emitting diode bulbs are a logical replacement, as they are inexpensive to operate. Despite research focusing on poultry responses to LED's increasing in frequency in the last two years, some gaps in our knowledge remain. For example, looking at the impact of graded levels of wavelength on melatonin production, and the impact of melatonin on production and welfare parameters, has received only minimal attention. To address this gap, four specific short-term objectives have been identified, comparing broiler responses under one of 4 light wavelengths (475 nm [blue], 510 nm [green], 570 nm [yellow] and 650 nm [red]). With use of data regression analysis (used in my four published works on daylength), dependant variable response curves will be derived. The objectives include: Objective 1: We will determine if birds prefer one wavelength over another. An undergraduate student will work with me on this section. Objective 2: This work will facilitate understanding of how wavelength impacts productivity characteristics, including time of growth (important for health), mortality and morbidity levels, lameness, bird behaviour, muscle yield, melatonin and growth hormone (IGF-1) production. This section will be led by a Ph.D. student. Objective 3: This work will determine the impact of melatonin production on growth, health and welfare of broilers. By altering blood melatonin levels via feeding exogenous melatonin in this unique study, we (led by Ph.D. student) will establish if melatonin impacts these variables. Objective 4: My previous work with daylength has been adopted world-wide because of the improvements in welfare and productivity that are achieved by varying darkness length each day. If light wavelength alters the amount of light that reaches the brain of the bird, it is possible that an interaction between daylength and wavelength could exist. This work section will be led by the M.Sc. student. In conclusion, this work has the potential to find relationships between production and behaviour response variables in broilers, and link them to potential differences in melatonin production. As a complete package with well-replicated science, the publications resulting from the work will aid producers in their decision of light choices, and provide consumers comfort in understanding their food comes from ethically responsible production systems. The training of three HQP in poultry welfare and management will benefit the Canadian poultry industry in the future.

家禽管理可以对禽类生产和福利产生重大影响。我之前的研究集中在一些管理实践上，包括使用照明方案(日照时间)。这项工作现已在世界范围内实施，以改善鸟类的福利和生产力。 2014年，加拿大自然资源部立法禁止家禽饲养场常用的白炽灯。发光二极管灯泡是一种合乎逻辑的替代品，因为它们的操作成本很低。尽管研究集中在家禽对LED的反应在过去两年中频率的增加，但我们的知识仍然存在一些空白。例如，研究波长的分级水平对褪黑素产生的影响，以及褪黑素对生产和福利参数的影响，只得到了极少的关注。 为了解决这一差距，已经确定了四个具体的短期目标，比较了四种光波长(475 nm[蓝]、510 nm[绿]、570 nm[黄]和650 nm[红])下肉鸡的反应。使用数据回归分析(在我的四部已发表的日长著作中使用)，将得出因变量响应曲线。 目标包括： 目标1：我们将确定鸟类是否喜欢一个波长而不是另一个波长。一名本科生将和我一起学习这一部分。 目标2：这项工作将有助于理解波长如何影响生产力特征，包括生长时间(对健康很重要)、死亡率和发病率、跛行、鸟类行为、肌肉产量、褪黑素和生长激素(IGF-1)的产生。这一部分将由一名博士生领导。 目标3：本工作将确定褪黑激素生产对肉鸡生长、健康和福利的影响。在这项独特的研究中，通过喂食外源性褪黑素来改变血液中的褪黑素水平，我们(由博士生领导)将确定褪黑素是否会影响这些变量。 目标4：我之前的日光工作已经在世界范围内被采用，因为通过每天不同的黑暗长度实现了福利和生产力的改善。如果光的波长改变了到达鸟类大脑的光量，就有可能存在日长和波长之间的相互作用。这项工作将由M.Sc领导。学生。 总而言之，这项工作有可能找到肉鸡生产和行为反应变量之间的关系，并将它们与褪黑激素生产的潜在差异联系起来。作为一套完整的、具有良好重复性的科学，这项工作产生的出版物将帮助生产商做出轻质选择的决定，并让消费者放心地理解他们的食品来自道德负责的生产系统。三位HQP在家禽福利和管理方面的培训将使加拿大家禽业未来受益。