Comparison of Various Fan, Sprinkler, and Mister Systems in Reducing Heat Stress in Dairy Cows

Lin, Jiahui; Moss, B.R.; Koon, J. L.; Flood, C. A.; Smith, Ronald C.; Cummins, K.A.; Coleman, David

doi:10.13031/2013.19370

Cited by 27 publications

(8 citation statements)

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“…Globally, ambient temperature in the facilities using misting technologies was 2–9 °C cooler than the barns without evaporative cooling, while relative humidity was increased by 8–50 units of percentage with misters. Overall, misting systems reduced THI by 1 to 5 units [66,67,71,73]. This is in accordance with the formula developed by St-Pierre et al [8] from published data that quantified similar declines in THI for misting systems used in hot temperatures.…”

Section: Methods For Reducing Heat Stresssupporting

confidence: 84%

“…Numerous studies [67,68,69,70,71,72,73,74,75] compared the environmental conditions and physiological responses of dairy cows under misters with those obtained under an open-sided barn alone or equipped with fans (Table 6). Globally, ambient temperature in the facilities using misting technologies was 2–9 °C cooler than the barns without evaporative cooling, while relative humidity was increased by 8–50 units of percentage with misters.…”

Section: Methods For Reducing Heat Stressmentioning

confidence: 99%

“…This is in accordance with the formula developed by St-Pierre et al [8] from published data that quantified similar declines in THI for misting systems used in hot temperatures. Dairy cows generally benefitted from misters since rectal temperatures (−0.8 °C) and respiration rates (−20 breaths min −1 ) were reduced when used [66,67,68,70,71,72,73,74]. Only Chan et al [69] observed no significant effect of misters on these parameters.…”

Section: Methods For Reducing Heat Stressmentioning

confidence: 99%

“…Only Chan et al [69] observed no significant effect of misters on these parameters. Several research works [68,71,72,73,75] concluded that misting systems positively affects milk yield (+1.7 kg∙day −1 ).…”

Section: Methods For Reducing Heat Stressmentioning

confidence: 99%

“…Sprinklers use low-pressure nozzles (10–40 psi) with flow rates of about 0.75–2 L∙min −1 run for 1–3 min every 5–15 min in the 21–27 °C temperature range [2,10,22,58,59,85]. However, they are known to generate a large volume of water to be processed [9,59], about 10 times (200–530 and 2050–5350 L∙day −1 ) that of misting systems [71]. …”

Section: Methods For Enhancing Cow Heat Lossesmentioning

confidence: 99%

See 4 more Smart Citations

Practices for Alleviating Heat Stress of Dairy Cows in Humid Continental Climates: A Literature Review

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2017

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Simple SummaryThe severity of heat stress issues on dairy cows will increase as global warming progresses. Fortunately, major advances in environmental management, including fans, misters, sprinklers, and cooled waterbeds, can attenuate the effects of thermal stress on cow health, production, and reproduction. These cooling systems were, however, tested in subtropical areas and their efficiency in northern regions is uncertain. This article assesses the potential of existing technologies to cool cows in humid continental climates through calculation of heat stress indices.AbstractHeat stress negatively affects the health and performance of dairy cows, resulting in considerable economic losses for the industry. In future years, climate change will exacerbate these losses by making the climate warmer. Physical modification of the environment is considered to be the primary means of reducing adverse effects of hot weather conditions. At present, to reduce stressful heat exposure and to cool cows, dairy farms rely on shade screens and various forms of forced convection and evaporative cooling that may include fans and misters, feed-line sprinklers, and tunnel- or cross-ventilated buildings. However, these systems have been mainly tested in subtropical areas and thus their efficiency in humid continental climates, such as in the province of Québec, Canada, is unclear. Therefore, this study reviewed the available cooling applications and assessed their potential for northern regions. Thermal stress indices such as the temperature-humidity index (THI) were used to evaluate the different cooling strategies.

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Section: Methods For Reducing Heat Stresssupporting

confidence: 84%

Section: Methods For Reducing Heat Stressmentioning

confidence: 99%

Section: Methods For Reducing Heat Stressmentioning

confidence: 99%

Section: Methods For Reducing Heat Stressmentioning

confidence: 99%

Section: Methods For Enhancing Cow Heat Lossesmentioning

confidence: 99%

See 3 more Smart Citations

Practices for Alleviating Heat Stress of Dairy Cows in Humid Continental Climates: A Literature Review

Fournel

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2017

Animals

106

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Response of Domestic Animals to Climate Challenges

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Lacetera

Valtorta

et al. 2009

Biometeorology for Adaptation to Climate Variability and Change

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The livestock sector is socially, culturally and politically very significant. It accounts for 40% of the world's agriculture Gross Domestic Product (GDP). It employs 1.3 billion people, and creates livelihoods for one billion of the world's population living in poverty. Climate change is seen as a major threat to the survival of many species, ecosystems and the financial sustainability of livestock production systems in many parts of the world. The potential problems are even greater in developing countries. Economic studies suggest severe losses if current management systems are not modified to reflect the shift in climate. In short, farmers/ managers need to adapt to the changes. There has been considerable interest in gaining an understanding how domestic livestock respond to climatic stressors. Studies have for the most part been undertaken in developed countries. These studies have provided a wealth of knowledge on differences between genotypes, the impact of climatic stress on production, reproduction and health. However little is known about adaptation of animals to rapid changes in climatic

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Climate Resilient Livestock Production System in Tropical and Subtropical Countries

Hossain,

Rahman,

Karim

et al. 2023

Climate-Resilient Agriculture, Vol 1

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Comparison of Various Fan, Sprinkler, and Mister Systems in Reducing Heat Stress in Dairy Cows

Cited by 27 publications

References 0 publications

Practices for Alleviating Heat Stress of Dairy Cows in Humid Continental Climates: A Literature Review

Practices for Alleviating Heat Stress of Dairy Cows in Humid Continental Climates: A Literature Review

Response of Domestic Animals to Climate Challenges

Climate Resilient Livestock Production System in Tropical and Subtropical Countries

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