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

Abstract

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.

Acoustic Environment and Gas Production in Different Growing-Finishing Swine Facilities

“…The results of this study are corroborated by CASTRO et al (2013), who assessed the noise in swine maternity pens with masonry partitions or slate rocks. The results observed were also within the limits considered ideal for swine, 85dB.…”

Suplementação com óleo de coco para leitões até o desmame

“…In all weeks, the RH values low in the bays during a time interval in the day, except between the early afternoon (18 hours) and early morning until 9 hours. From that time it observed decrease in RH, which according to Castro et al (2013) can be attributed to management opening the side curtains, which allowed ventilation influence the dissipation of water vapor within the facility. Moreover, in the known zones of higher temperatures, lower levels of RH% for the stalls found.…”

“…The loss of heat to the environment in the evaporative form becomes impaired provided high values of temperature and humidity (Corassa et al, 2014) which can attenuate the ability of mothers to dissipate heat because the air saturated compromises loss of latent heat through the respiratory system, leading to a stressful environment over the animal (Castro et al, 2013). Regarding sows, Turco et al (1998) and Campos et al (2008) determine the critical value of 72 BGTHI infant sows.…”

Air quality in swine growing and finishing facilities with different building typologies

“…Research conducted with swine has demonstrated that the study of vocalization and sound pressure levels is an innovative and non-invasive method that can indicate the responses of the animal in adverse situations (Borges et al, 2010;Castro et al, 2013;Moura et al, 2008). These methodologies make possible to evaluate the situation of the environment where the animals are (Miranda et al, 2012), since the vocalization is the expression of their specific state (Dupjan et al, 2008).…”

“…Gases such as ammonia (NH 3 ), hydrogen sulfide (H 2 S) and carbon dioxide (CO 2 ) are the most present inside swine facilities (Amâncio et al, 2013). Ammonia is the most important gas, because it can occur at very high levels, irritating the respiratory system, leading to behavioral and physiological alterations, reduction in food consumption and weight gain, and possibly affecting the health of animals and workers (Paulo et al, 2009;Kiefer et al, 2010).The quantification of gas production in production systems is a global concern, since it can affect the environment, health of people involved in the production processes and even alter animal performance (Inoue et al, 2012).Research conducted with swine has demonstrated that the study of vocalization and sound pressure levels is an innovative and non-invasive method that can indicate the responses of the animal in adverse situations (Borges et al, 2010;Castro et al, 2013;Moura et al, 2008). These methodologies make possible to evaluate the situation of the environment where the animals are (Miranda et al, 2012), since the vocalization is the expression of their specific state (Dupjan et al, 2008).…”