Use of geostatistics on broiler production for evaluation of different minimum ventilation systems during brooding phase

Carvalho, Thayla Morandi Ridolfi de; Moura, Daniella Jorge de; Souza, Zigomar Menezes de; Souza, Gustavo Soares de; Bueno, Leda Gobbo de Freitas; Lima, Karla Andréa Oliveira de

doi:10.1590/s1516-35982012000100028

Cited by 20 publications

(14 citation statements)

References 17 publications

(19 reference statements)

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“…Therefore, these variables are inversely proportional, a finding that was also emphasized by CARVALHO et al (2012) andMEDEIROS et al (2014). Moreover, RH remained within limits postulated in the literature only in the upper left region, emphasizing existing microclimates within this facility; furthermore, factors like air temperature, shadowing, stocking density, water consumption and wasting could interfere with this variable.…”

Section: Z(x1) and Z (X1 + H) -Observations Distant In H (M)supporting

confidence: 57%

“…Geostatistics is one of the tools that enable deepening on the knowledge of the factors interfering with the rearing environment, providing the highest accuracy in corrections and adjustments of the farming systems (ABREU & ABREU, 2011;CARVALHO et al, 2012). The results can also be interpreted by natural variability that is, making the use of spatial dependence modeling for each variable through semivariance.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Z(x1) and Z (X1 + H) -Observations Distant In H (M)supporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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“…Sensors located at inlet areas described the behavior of the inlet air due to the changes and performance of the pad cooling. Sensors located at sidewalls demonstrated how external conditions influence internal conditions, once the isolating material is not the most adequate (Carvalho et al, 2012;Menegali et al, 2013). In addition, sidewalls are affected by the orientation of the building in relation to sun radiation.…”

Section: Strategic Positioning Of Sensorsmentioning

confidence: 99%

Positioning of sensors for control of ventilation systems in broiler houses: a case study

Curi

Conti

Vercellino

et al. 2017

Sci. agric. (Piracicaba, Braz.)

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Ventilation systems are incorporated at intensive poultry farms to control environment conditions and thermal comfort of broilers. The ventilation system operates based on environmental data, particularly measured by sensors of temperature and relative humidity.Sensors are placed at different positions of the facility. Quality, number and positioning of the sensors are critical factors to achieve an efficient performance of the system. For this reason, a strategic positioning of the sensors associated to controllers could support the maintenance and management of the microclimate inside the facility. This research aims to identify the three most representative points for the positioning of sensors in order to support the ventilation system during the critical period from 12h00 to 15h00 on summer days. Temperature, relative humidity and wind speed were measured in four different tunnel ventilated barns at the final stage of the production cycle. The descriptive analysis was performed on these data. TheTemperature and Humidity Index (THI) was also calculated. Then, the geostatistical analysis of THI was performed by GS + and the position of sensors was determined by ordinary kriging. The methodology was able to detect the most representative points for the positioning of sensors in a case study (southeastern Brazil). The results suggested that this strategic positioning would help controllers to obtain a better inference of the microclimate during the studied period (the hottest microclimate), considered critical in Brazil. In addition, these results allow developing a future road map for a decision support system based on 24 h monitoring of the ventilation systems in broiler houses.

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“…While very little has been done to understand the farrowing environment of pigs at the crate level, there have been reports that animals in the same environmenacoustic environments of sows and piglets tally controlled building do not always experience the same ambient conditions (Carvalho et al, 2012;Faria et al, 2008). Differences in ambient conditions could explain, at least partially, the substantial variation in pre-wean mortality in farrowing facilities.…”

Section: Introductionmentioning

confidence: 99%

Microenvironments in swine farrowing rooms: the thermal, lighting, and acoustic environments of sows and piglets

Morello

Lay

Rodrigues

et al. 2018

Sci. agric. (Piracicaba, Braz.)

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ABSTRACT:The present research hypothesized that the thermal, lighting and acoustic environments in commercial swine farrowing rooms vary over time and from crate to crate. This study was conducted on 27 replicates in two commercial farrowing rooms in North Central Indiana, each equipped with 60 farrowing crates. Temperature, relative humidity, light intensity, sound intensity, and air velocity were continuously monitored and estimated for each crate at the sow level, for 48 h post-farrowing, which is usually a critical period for piglet survivability. Average daily temperature for all the crates in Room 1 was 24.1 ± 2.0 °C, 1.0 °C lower (p < 0.05) than in Room 2. Although the overall mean temperature was similar between rooms and seasons, frequency distribution diagrams revealed that the proportion of time spent within distinct limits of mean daily temperature ranged from 15.0 °C to 28.0 °C and varied substantially between rooms and seasons. Similar results were found for all variables measured in this study. Differences in temperature, relative humidity, light intensity, air velocity, and sound intensity in crates were as high as 9.6 °C, 57 %, 3,847.3 Lx, 0.87 m s −1 , and 38.7 dBC, respectively, in the same farrowing room when measured at the same instant. The results of the present research indicate that aspects that go beyond the physical environment of the sows, such as thermal, lighting, and acoustic environment can vary substantially over time and between crates of automatically climate controlled farrowing rooms. These differences should be taken into consideration in production setting and research.

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Use of geostatistics on broiler production for evaluation of different minimum ventilation systems during brooding phase

Cited by 20 publications

References 17 publications

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

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

Positioning of sensors for control of ventilation systems in broiler houses: a case study

Microenvironments in swine farrowing rooms: the thermal, lighting, and acoustic environments of sows and piglets

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