Árvores de decisão baseadas em entalpia para avaliação de conforto para poedeiras leves em clima tropical

Harada, Érik dos Santos; Montanhani, Maria Elena Silva; Bueno, Leda Gobbo de Freitas; Neto, Mário Mollo; Souza, Silvia Regina Lucas de; Fonseca, Ricardo da

doi:10.33448/rsd-v10i3.13354

Cited by 3 publications

(5 citation statements)

References 22 publications

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“…The importance of environmental quality is escalating, with factors like ventilation and humidity, which directly influence air and litter quality, requiring control throughout the rearing period until the age of slaughter. Numerous studies have shown that elements such as temperature, relative air humidity, and air velocity assist birds in heat dissipation, thereby aiding them in maintaining their comfort enthalpy (Harada et al, 2021). Andrade et al (2018) posited that optimal bird productivity is achieved in farms that meet welfare requirements, thereby promoting the birds' physical and mental health as well as thermal comfort.…”

Section: Resultsmentioning

confidence: 99%

“…Heat stress, which can induce physiological issues and impact the endocrine and respiratory systems as well as the electrolyte balance of birds, is linked to the development and productivity of farms (Harada et al, 2021). Abreu et al (2015) asserted that birds require a suitable environment to achieve their productive potential.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the method and management of rearing, shed density, and the intensity of environmental thermal regulation must be considered. Harada et al (2021) suggested that the enthalpy index, which incorporates temperature, relative air humidity, and atmospheric pressure, can be used to classify the indices of animal discomfort and ambience. These environmental variables are typically available in meteorological stations.…”

Section: Introductionmentioning

confidence: 99%

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Enthalpy as a thermal comfort index in broiler poultry production

Pecoraro,

Gonçalves,

Nunes

et al. 2024

Rev. bras. eng. agríc. ambient.

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Enthalpy is currently suggested as a suitable index for assessing the internal environment of poultry production, primarily dependents on air temperature and relative air humidity. This study aimed to analyze enthalpy in bird production in Londrina, located in the northern region of Paraná, Brazil, and to model the comfort enthalpy required for enhanced production efficiency. Data from 1961 to 2021 from the Instituto Nacional de Meteorologia (INMET), Brasília, Federal District, Brazil, were utilized to compare the thermal comfort conditions and critical limits set for the birds. The meteorological data from this period were scrutinized to understand their variations and interrelationship through a descriptive study and correlation analysis of different parameters. The research findings, based on the enthalpy indices derive historical averages, suggest that heating is crucial for birds during the first and second weeks of housing, during the winter, given the location’s low temperatures. For birds housed during the third to sixth weeks of age, the enthalpy indices indicated the necessity of cooling systems.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enthalpy as a thermal comfort index in broiler poultry production

Pecoraro,

Gonçalves,

Nunes

et al. 2024

Rev. bras. eng. agríc. ambient.

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“…Based on the literature, the ideal enthalpy index intervals were verified, according to the characteristics of the birds, adapted from studies by Macari and Furlan, 2001;Barbosa Filho et al, 2007 andHarada et al, 2021 (Tables 1 and 2). Next, the procedures for data analysis were performed with the aid of the R Program (R CORE TEAM, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, knowledge of these climatic variables is relevant to support the design of the facilities and define elements such as orientation, materials, and ventilation system. Among other criteria, the thermal conditions in poultry facilities have been evaluated based on the enthalpy index (MACARI and FURLAN 2001, BARBOSA FILHO et al 2007, NAZA-RENO et al 2009, GARCIA et al 2015, AKAMINE and PASSINI 2017, BENINCASA et al 2017, QUEIROZ et al 2017, FERRAZ et al 2018, ROMANO et al 2018, SILVA et al 2018, HARADA et al 2021. Thus, this study is based on the hypothesis that the cited index can qualify the thermal environment to assist in the construction of poultry facilities.…”

Section: Introductionmentioning

confidence: 99%

Bioclimatic diagnosis for poultry in municipalities of Mato Grosso, Brazil

Borges¹,

Mendoza²,

Morais³

et al. 2021

SFJEAS

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This study aimed to determine the enthalpy index in three municipalities of Mato Grosso, to characterize the bioclimatic profile for the poultry industry. In the research, the compensated daily dry bulb temperature and the daily average relative humidity were used. The data corresponding to a historical series of 35 years, between 01/01/1985 and 12/31/2020, recorded in conventional meteorological stations in the municipalities of Canarana, Nova Xavantina, and Santo Antônio de Leverger, available in the Meteorological Database for Teaching and Research of the National Institute of Meteorology (INMET). Then, monthly descriptive statistics of the historical series were determined and bar plot graphs with enthalpy values were developed. These graphs included the lower and upper enthalpy limits, suitable for laying hens and broilers, to qualify the thermal conditions of environmental comfort in the three municipalities of Mato Grosso. It was concluded that the enthalpy index made it possible to characterize the bioclimatic profile of the mentioned municipalities for poultry farming, according to the months of the year. The natural thermal conditions in these municipalities were not favorable to poultry farming, requiring extra investments in the air conditioning of the sheds. The increase in thermal discomfort for broilers was accentuated from the fourth week of the production cycle. The applied methodology presented itself as an adequate tool to assist in the elaboration of projects related to environmental changes in aviaries.

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Dynamics of the Thermal Environment in Climate-Controlled Poultry Houses for Broiler Chickens

Ferreira,

Campos,

Ferraz

et al. 2024

AgriEngineering

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The implementation of poultry houses with enhanced control over environmental variables represents a solution to the growing demands for production and animal welfare. This study assessed the internal environment of dark-house poultry houses for broilers on a weekly basis throughout a production cycle. Data were collected over six weeks, from March to April 2016 involving 40,000 Cobb500TM broilers. A Hobo® datalogger continuously monitored the temperature (°C), relative humidity (%), dew point temperature (°C), and black globe temperature (°C) at 15 min intervals. The indices analyzed included the temperature and humidity index (THI), the black globe and humidity index (BGHI), and enthalpy (H). In the first week, both the THI and BGHI indicated favorable conditions for the birds, with the THI ranging from 72.4 to 80 and the BGHI from 77 to 81.6. Between the second and fifth weeks, the THI conditions varied between thermal comfort and discomfort, from 56.6 to 72. In the sixth week, all indices indicated discomfort, reflecting increased metabolism and population density. The dark-house system demonstrated a feed efficiency of 51%, an accumulated mortality rate of 1.97%, and a total production of 99,873 kg of meat. The study highlights the importance of continuously monitoring and adjusting environmental conditions to optimize production and enhance bird welfare.

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Árvores de decisão baseadas em entalpia para avaliação de conforto para poedeiras leves em clima tropical

Cited by 3 publications

References 22 publications

Enthalpy as a thermal comfort index in broiler poultry production

Enthalpy as a thermal comfort index in broiler poultry production

Bioclimatic diagnosis for poultry in municipalities of Mato Grosso, Brazil

Dynamics of the Thermal Environment in Climate-Controlled Poultry Houses for Broiler Chickens

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