Sazonalidade Da Ambiência Térmica, Aérea E Acústica Em Creche E Terminação De Suínos.

Baracho, Martha O.; Tolon, Yamilia Barrios; Nääs, Irenilza de Alencar; Rojas, Marcelo

doi:10.18011/bioeng2008v2n3p201-212

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…This situation may have occurred due to the greater need to maintain the thermal environment in the comfort zone inside the sheds, being necessary to activate the nursery cooling system. Baracho et al (2008) evaluated the seasonality of the acoustic environment in swine nurseries and observed that the noise levels in the facility were not influenced by season of the year. However, the authors observed oscillations of these levels during the day, which corroborate with the results found in the studies performed by Castro et al (2013), when Morning evaluated the thermal environment and noise in nursery cells for swines with masonry partitions and slate rocks.…”

Section: Resultsmentioning

confidence: 99%

Welfare and spatial distribution of noise levels in swine nursery

Damasceno

Oliveira

Ferraz

et al. 2019

Rev. bras. eng. agríc. ambient.

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The aim of this study was to evaluate the welfare and spatial distribution of noise levels in a swine nursery during the first three weeks of animal’s life. The climatic conditions were evaluated through the dry-bulb temperature (Tdb), relative humidity (RH) and black globe temperature and humidity index (BGHI) and allowed us to observe that the heating system influenced the conditions in the environment, and the use of the air conditioning system did not guarantee animal’s comfort conditions. The analysis on the spatial distribution of noise levels was performed using geostatistics and demonstrated the occurrence of spatial variability inside the facilities. The highest frequencies of noise levels were concentrated between 60 and 70 dB, and the highest noise values were observed near the fans. The mean BGHI values were below the thermal comfort range for piglets in all systems tested.

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Section: Resultsmentioning

confidence: 99%

Welfare and spatial distribution of noise levels in swine nursery

Damasceno

Oliveira

Ferraz

et al. 2019

Rev. bras. eng. agríc. ambient.

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Zoning of environmental conditions inside a wean-to-finish pig facility

et al. 2016

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Using geostatistics, this study aimed to analyze environmental conditions for weanto-finish swines at 3 pm, during the most sensitive phases to thermal stress (growth/ finishing and finishing). To this end, dry-bulb temperature, relative humidity, air speed, ammonia and carbon dioxide concentrations were measured at 81 equidistant points within the barn. Descriptive statistics was used to classify attribute variability, generating mean, median, variation coefficient, asymmetry and kurtosis, through the normality of Kolmogorov-Smirnov (KS). For that, it was used Minitab 15 software. Moreover, semivariograms were used to assess spatial dependence using the GS+ software, and through Surfer, spatial distribution maps were designed. Dry-bulb temperature and relative humidity showed a more homogeneous distribution whether compared to the other attributes. Furthermore, critical points were observed within the facility, with temperatures and low humidity, indicating the need for fogging equipment and fans to improve thermal comfort and animal welfare.

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Uso de ardósia na construção de celas de maternidade para suínos: II - ambiente térmico e avaliação dos ruídos

et al. 2013

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RESUMO:Este trabalho teve o objetivo de avaliar o ambiente térmico e o ruído em celas de maternidade para suínos com divisórias de alvenaria ou com rochas de ardósia. Para as medidas das variáveis de conforto térmico e de ruídos, utilizaram-se de termômetros e decibelímetro. No interior das celas e para a análise estatística, foram usados doze matrizes e cento e trinta e nove leitões, distribuídos em delineamento em blocos casualizados, em esquema de parcelas subdivididas. Os resultados mostraram que, no período da manhã, em ambos os tratamentos, as condições de conforto térmico foram mais adequadas para as matrizes, enquanto no período da tarde, mais adequadas para os leitões; com relação ao ruído, este foi menor nas celas de alvenaria. De forma geral, o ambiente no interior das celas construídas em ardósia apresentou umidade relativa mais baixa, e ITGU e temperatura mais elevada que as celas construídas em alvenaria. O nível de ruídos permaneceu dentro dos limites considerados ideais para suínos em ambos os tratamentos. PALAVRAS-CHAVE:ambiência, ruído, divisórias, maternidade de suínos. USE OF SLATE TO BUILT SWINE NURSERY CELLS: II -THERMAL ENVIRONMENT AND NOISE EVALUATION ABSTRACT:The aim of the present study was to evaluate the thermal environment and noise levels in swine farrowing cells built with masonry or slate. Thermometers and sound level meter equipment were used to measure the thermal comfort variables. Inside the cells and for the statistical analysis, twelve sows and one hundred thirty-nine piglets were used, distributed in a randomized blocks design in a split-plot arrangement. The results showed that in the morning, in both treatments, the thermal comfort conditions were more suitable for sows, while in the afternoon it was more suitable for piglets. The noise was lower in the masonry cells. Overall, the environment inside in the cells built with slate presented lower relative humidity and, higher BGHI and temperature than those built with masonry. The noise level remained within the thresholds considered as ideal for swine in both treatments.

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Sazonalidade Da Ambiência Térmica, Aérea E Acústica Em Creche E Terminação De Suínos.

Cited by 3 publications

References 30 publications

Welfare and spatial distribution of noise levels in swine nursery

Welfare and spatial distribution of noise levels in swine nursery

Zoning of environmental conditions inside a wean-to-finish pig facility

Uso de ardósia na construção de celas de maternidade para suínos: II - ambiente térmico e avaliação dos ruídos

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