Perfomance of an evaporative cooling system of a finishing phase swine barn

Sartor, Valmir; Baêta, Fernando da Costa; Tinôco, Ilda de Fátima Ferreira; Luz, Maira Luciana

doi:10.1590/s0103-90162003000100003

Cited by 6 publications

(9 citation statements)

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“…In swine production, fogging systems allow the improvement of growth performance by 5% to 10%, especially in finishing pigs (Nichols et al, 1979;Dutertre et al, 1998;Haeussermann et al, 2007). However, the gain of evaporative cooling pads for improving pig performance under heat stress is relatively low perhaps because it results in an increase of air moisture (Dutertre et al, 1998;Sartor et al, 2003;Kunavongkrit et al, 2005). Finally, pad cooling is effective to lower T a in closed poultry or pig houses (Europe, United States, etc.…”

Section: Strategies To Alleviate Heat Stress In Farm Animalsmentioning

confidence: 99%

Adaptation to hot climate and strategies to alleviate heat stress in livestock production

Renaudeau¹,

Collin

Yahav

et al. 2012

Animal

715

611

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Despite many challenges faced by animal producers, including environmental problems, diseases, economic pressure, and feed availability, it is still predicted that animal production in developing countries will continue to sustain the future growth of the world's meat production. In these areas, livestock performance is generally lower than those obtained in Western Europe and North America. Although many factors can be involved, climatic factors are among the first and crucial limiting factors of the development of animal production in warm regions. In addition, global warming will further accentuate heat stress-related problems. The objective of this paper was to review the effective strategies to alleviate heat stress in the context of tropical livestock production systems. These strategies can be classified into three groups: those increasing feed intake or decreasing metabolic heat production, those enhancing heat-loss capacities, and those involving genetic selection for heat tolerance. Under heat stress, improved production should be possible through modifications of diet composition that either promotes a higher intake or compensates the low feed consumption. In addition, altering feeding management such as a change in feeding time and/or frequency, are efficient tools to avoid excessive heat load and improve survival rate, especially in poultry. Methods to enhance heat exchange between the environment and the animal and those changing the environment to prevent or limit heat stress can be used to improve performance under hot climatic conditions. Although differences in thermal tolerance exist between livestock species (ruminants . monogastrics), there are also large differences between breeds of a species and within each breed. Consequently, the opportunity may exist to improve thermal tolerance of the animals using genetic tools. However, further research is required to quantify the genetic antagonism between adaptation and production traits to evaluate the potential selection response. With the development of molecular biotechnologies, new opportunities are available to characterize gene expression and identify key cellular responses to heat stress. These new tools will enable scientists to improve the accuracy and the efficiency of selection for heat tolerance. Epigenetic regulation of gene expression and thermal imprinting of the genome could also be an efficient method to improve thermal tolerance. Such techniques (e.g. perinatal heat acclimation) are currently being experimented in chicken.

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Section: Strategies To Alleviate Heat Stress In Farm Animalsmentioning

confidence: 99%

Adaptation to hot climate and strategies to alleviate heat stress in livestock production

Renaudeau¹,

Collin

Yahav

et al. 2012

Animal

715

611

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“…A temperatura do ar não deve ser acima de 31°C e abaixo de 8 °C nessa fase de criação (SILVA, 1999).…”

Section: Introductionunclassified

Qualidade do ar, ambiente térmico e desempenho de suínos criados em creches com dimensões diferentes

Campos¹,

Tinôco²,

Baêta³

et al. 2009

Eng. Agríc.

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RESUMO:Em uma suinocultura, a fase de creche é considerada crítica, na qual o animal fica exposto às condições ambientais do recinto onde está alojado, sem a proteção da matriz e inserido em um meio social coletivo e desconhecido. Essa fase requer ambiente térmico mais aquecido e, por isso, em período de inverno, os abrigos são mantidos mais fechados, o que pode ser agravante em termos de renovação do ar. Este trabalho teve como objetivo avaliar duas creches de dimensões diferentes, em período de inverno, levando-se em consideração o ambiente térmico, a qualidade do ar e o desempenho dos animais alojados nessas instalações. Foram utilizadas duas creches com dimensões diferentes (I e II), ambas sem nenhum tipo de aquecimento. Foram feitas medições de concentrações instantâneas de NH 3 (ppm), CO (ppm) e CO 2 (ppm). Dados relativos ao conforto térmico ambiente (temperatura e umidade) foram coletados continuamente. Concluiu-se que a concentração dos gases CO 2 e NH 3 , mensurados em ambas as creches, não atingiram níveis que possam causar danos à saúde dos animais; não houve concentração mensurável do gás monóxido de carbono em nenhuma das mesmas; o ambiente térmico nas creches, no período estudado, esteve em condições consideradas confortáveis. PALAVRAS-CHAVE:ambiência animal, conforto térmico, instalação suinícola. AIR QUALITY, THERMAL ENVIRONMENT AND PERFORMANCE OF SWINES RAISED IN FARROWING WITH DIFFERENT DIMENSIONSABSTRACT: The phase of swine nursery is considered a critical one, in which the animal is exposed to environmental conditions of the premises on which it is located, without the matrix protection and inserted into a social collective and unknown environment. This phase requires a more heated thermal environment and, because of that, on winter time the shelters are kept more closed, which can cause damage in terms of renewing the air. This work has the objective of evaluating two different sizes of farrowing on winter time, considering thermal environment, air quality and performance of animals located in these facilities. We used two different sizes (I and II), both without any kind of heating. Were measured instantaneous concentrations of NH 3 (ppm), CO (ppm) and CO 2 (ppm). Data relating to thermal comfort environment (temperature and humidity) were collected continuously. It was concluded that the concentration of CO 2 and NH 3 gases, measured in both farrowing, did not reach levels that could harm the health of animals; with no measurable concentration of carbon monoxide gas in any of these, the thermal environment in the farrowing during the studied time was considered comfortable.

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“…Sartor et al (2003) reported that evaporative cooling system improved thermal conditions inside the facilities for finishing swine, by reducing BGHT index, as well as providing better feed conversion and greater weight gain of animals.…”

Section: Resultsmentioning

confidence: 99%

“…Evaporative cooling system improved physiological, behavioral and productive responses from growing swine (Huynh et al, 2006), environmental thermal condition (Sartor et al, 2003) and provided an increase in weaning piglet weight (Justino et al, 2015). Otherwise, Collin et al (2001) reported that weight gain and voluntary feed intake of swine were reduced by up to 37 and 30% respectively at 33 °C when compared to 23 ºC.…”

Section: Resultsmentioning

confidence: 99%

“…By using evaporative cooling system, environment thermal conditions may improve (Ponciano et al, 2013;Liang et al, 2014). Sartor et al (2003) reported a reduction in the black globe humidity index inside the facility from 83.5 to 82.4 during the critical period of the day (2 p.m.), besides reduction in feed conversion from 3.27 to 2.88, and increase in weight gain, from 0.97 to 1.02 kg a day.…”

Section: Introductionmentioning

confidence: 98%

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Geostatistics applied to swine facilities equipped with evaporative cooling system

Abreu

Costa

Feddern

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe purpose of this study was to evaluate the spatial variation of temperature, relative humidity and black globe humidity temperature (BGHT) index in growing-finishing swine facilities, with and without evaporative air cooler. The experiment was conducted in a 60 x 9 m facility containing 32 pens of 3.20 x 4.00 m each, divided into two sectors. The treatments were without evaporative air cooler (control) and with evaporative air cooler. Temperature and relative humidity data were collected weekly in two periods (morning and afternoon) at 32 different sampling points, encompassing the center of each pen and the outer perimeter of the facility. Animal performance variables were: feed intake, feed conversion, weight out of the nursery, slaughter weight, weight gain and daily weight gain. According to the results, the analyzed variables showed spatial dependence, with lower temperature and higher relative humidity in the evaporative air cooler environment. However, evaporative air cooler system provided better environment thermal conditions inside the facilities, lowering BGHT values, which were lower in the adiabatic cooling sector. Although thermal conditions were better in the air cooler environment, swine performance was not affected.Geoestatística aplicada às instalações suínas equipadas com sistema de resfriamento evaporativo R E S U M O Objetivou-se, neste trabalho, avaliar a variação espacial da temperatura, umidade relativa e índice de temperatura de globo negro e umidade (ITGU) em instalações de suínos na fase de crescimento e terminação, com e sem resfriador de ar evaporativo. O experimento foi conduzido em uma edificação de 60 x 9 m, contendo 32 baias de 3,20 x 4,00 m cada uma, divididos em dois setores. Os tratamentos foram sem resfriador de ar evaporativo (controle) e com resfriador de ar evaporativo sendo os dados de temperatura e umidade relativa coletados semanalmente em dois períodos (manhã e tarde) em 32 pontos de amostragem diferentes abrangendo o centro de cada baia e o perímetro exterior das instalações. As variáveis de desempenho dos animais foram: consumo de ração, conversão alimentar, peso ao sair da creche, peso ao abate, ganho de peso e ganho de peso diário. Os resultados mostraram que as variáveis analisadas apresentaram dependência espacial com temperatura mais baixa e umidade do ar mais alta no setor com resfriador evaporativo. Desta forma, o resfriamento evaporativo melhorou as condições térmicas ambientais no interior da instalação, reduzindo os valores do ITGU, os quais foram menores no setor de resfriamento adiabático. Embora o conforto térmico do ambiente com resfriamento evaporativo tenha sido melhor, os suínos não responderam a esta melhoria, em termos de desempenho. Key words:animal welfare spatial analyses environment conditions semivariogram Palavras-chave: bem estar animal análise espacial condições do ambiente semivariograma

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Perfomance of an evaporative cooling system of a finishing phase swine barn

Cited by 6 publications

References 1 publication

Adaptation to hot climate and strategies to alleviate heat stress in livestock production

Adaptation to hot climate and strategies to alleviate heat stress in livestock production

Qualidade do ar, ambiente térmico e desempenho de suínos criados em creches com dimensões diferentes

Geostatistics applied to swine facilities equipped with evaporative cooling system

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