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Poultry ventilation
Ventilation in a poultry house supplies fresh air that is essential to sustain life. It also helps reduce the extremes of temperature, humidity and air contamination to tolerable limits for confined chickens. Improved ventilation systems have also made possible the high density populations of livestock and poultry in confinement, thus reducing the building cost per unit housed. This is economically important since it reduces production and labour costs. Ventilation air removes excess heat, moisture, dust and odours from the building and, at the same time, dilutes airborne disease organisms. Properly designed winter systems also conserve energy by utilising heat generated by the birds. Providing proper ventilation to poultry is an art but it can be mastered by any determined and willing poultry grower. It is a challenge, however, since poultry houses are different and ventilation requirements change with time of day, season, temperature, humidity, wind, bird age and density.
It is fairly common practice to operate evaporative cooling pads off both house temperature and an interval timer. For instance, the evaporative cooling pad pump would be set to turn on once house temperature reaches 82°F, at which time an interval...
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In commercial layer cage houses, during tunnel ventilation the air velocity is very high in corridors at front and back of the cages but it is very low inside cages where birds are present. During summer, birds are not comfortable due to very low air velocity; there is a very low "WIND CHILL EFFECT". What is the method to get required air velocity inside cages to get maximum wind chill? ...
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Measuring wind speed/air velocity in a tunnel-ventilated house can be a challenge. Even in the best designed house wind speeds will vary hundreds of feet per minute depending on when and where it is measured. Wind speeds tend to be highest toward the center of the cross-section and lowest near the floor next to the side walls. How much the wind speed varies depends on house construction, the number of fans operating, proximity to the tunnel fans or tunnel inlet,...
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When building a new house or retrofitting an older one, tunnel fan selection is one of the most, if not the most important decision a producer has to make. A house’s fans are essentially the engine of the ventilation system and as a result have a significant effect on a producer’s ability to maintain the proper environmental conditions throughout the year. Furthermore, with rising electricity prices, selecting the right energy-efficient fan can save a producer thousands of...
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A 2 ½ day training program has been specifically designed for those who want to learn more about the design and management of modern poultry houses. The workshop/webinar consists of lectures as well as hands on group exercises designed to help attendees gain a firm understanding of the principles behind hot weather poultry house...
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During the summertime, most broiler producers would not consider a house temperature in the low 80's of particular concern, even with a house full of near-market-age birds. But in truth they should be. Because without sufficient air speed, the...
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Figure 1. Cilia During cool weather, maintaining good air quality is vital to avoid bird health issues. It is a 24-hour-a-day, seven-day-a-week, job. One of the most important air quality variables that must be kept to a minimum...
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Figure 1. Air speeds in fifteen locations across the cross-section of a 40' X 500' broiler house with market-age birds. Keeping market-age birds cool during hot weather is all about...
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Michael Czarick (Extension Engineer – University of Georgia, Department of Poultry Science) will be one of the speakers at the Latin American Poultry Congress that will take place in Lima, Peru, from October 9th to the 11th.
He is considered by the academic community as the principal authority in the design and operation of...
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Michael Czarick (University of Georgia) explained the advantages of using variable speed fans, including the reduction of power costs, during IPPE 2018 in Atlanta, USA....
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During the summertime, most broiler producers would not consider a house temperature in the low 80's of particular concern, even with a house full of near-market-age birds. But in truth they should be. Because without sufficient air speed, the use of...
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Recommendations: 6
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Mike Czarick (University of Georgia) talked about the use of filters and the relevance of biosecurity in poultry houses, during IPPE 2019 in Atlanta, USA....
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1. Introduction
Stress, a response to adverse stimuli, is difficult to define and understand because of its nebulous perception. According to Selye [1], “stress is the nonspecific response of the body to any demand”, whereas stressor can be defined as “an agent that produces stress at any time”. Therefore, stress represents the reaction of the animal organism (i.e., a...
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The weather constitutes a complex system, which acts upon the bird & exert various detrimental effects on neuroendocrine, cardiorespiratory system. Rearing birds out of their thermal comfort zone could mean failing to leverage full genetic potential. Poultry production in the tropical and subtropical regions having biggest environmental challenge is heat stress which could reduce productivity and even increase the mortality tolls due to depressed...
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Tom Tabler (Mississippi State University) explained how to use this tool and discussed other methods to check temperature and evaluate facilities, during IPPE 2019 in Atlanta, USA....
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Mike Czarick (University of Georgia) discussed the effect of temperature of pads on humidity, as well as water usage, during IPPE 2019 in Atlanta, USA....
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A 2 ½ day training program has been specifically designed for those who want to learn more about the design and management of modern poultry houses. The workshop/webinar consists of lectures as well as hands on group exercises designed to help attendees gain a firm understanding of the principles behind hot weather poultry house...
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Dear members, There´s a growing interest in tunnel ventilation systems in order to reduce heat stress and increase animal comfort in hot weather. Despite its many benefits, operating costs can be high. How can we minimize the use of energy? Look forward to your ideas and experiences! ...
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Michael Czarick (University of Georgia) discussed the impact of stocking density, above every other factor, on the body temperature of broilers and how to notice the important signs, during IPPE 2018 in Atlanta, USA....
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Introduction Keeping birds comfortable during hot, humid weather is critical for optimizing weight gains, feed conversion and livability. Improved growth rates and the trend to heavier average market weights contribute to greater heat loads in modern broiler barns. While the poultry industry has made significant strides to minimize seasonal effects, even the best housing design can still result in birds settling with lighter weights when nature turns up the temperature. Current...
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