Caracterização da variabilidade espacial dos índices de conforto animal em sistemas de confinamento Compost Barn

Mota, Vania Corrêa; Andrade, Ednilton Tavares de; Leite, Daniel

doi:10.31533/pubvet.v13n3a276.1-14

Cited by 5 publications

(6 citation statements)

References 16 publications

(23 reference statements)

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“…This difference may be caused by the ventilation, which decreases the indoor values of BGTHI, besides the thermal conditioning provided by the building, which attenuates the effect of the indoor radiant heat load. Mota et al (2019) observed an effect of the daytime on the increase in BGTHI, especially in the afternoon as a result of the increase in air temperature. The same authors suggest that they are aspects of greater difficulty of control.…”

mentioning

confidence: 88%

“…This finding may be related to the animals not being under direct solar radiation. Changes in room temperature affect body temperature, by increasing rectal temperature, respiratory rate, surface temperature, and activate thermoregulatory responses to maintain thermostability (Pilatti et al, 2018;Mota et al, 2019).…”

Section: Respiratory Rate and Skin Temperaturementioning

confidence: 99%

“…Compost bedded pack barns (CB) first appeared in the United States and are spreading worldwide, in countries such as Israel (Klaas et al, 2010), the United States of America (Barberg et al, 2007a;Barberg et al, 2007b;Janni et al, 2007) and Brazil (Fávero et al, 2015;Costa et al, 2018;Pilatti et al, 2018). This housing system has demonstrated satisfactory results in relation to animal comfort (Pilatti et al, 2018;Mota et al, 2019), improved hygiene and lameness scores (Costa et al, 2018;Pilatti et al, 2018), as well as good productivity per animal (Barberg et al, 2007a;Black et al, 2013). The CB includes a resting bedded pack area, usually filled with organic material and where the composting process takes place.…”

Section: Introductionmentioning

confidence: 99%

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Compost barns in Brazilian Subtropical region (Part 1): facility, barn management and herd characteristics

Radavelli

Danieli

Zotti

et al. 2020

RSD

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The objective of this study was to describe barn management practices and to evaluating cow locomotion, hygiene and hock lesion prevalence of dairy cows housed in Compost Barns (CB) located in the subtropical region of Brazil. The CB has demonstrated satisfactory results in relation to animal comfort and productivity. However, modifications to the initial American recommendations are being made by producers in order to adapt it to different conditions. Thirty dairy farms were analyzed regarding structural measurements and layout, management practices, bedded pack and herd characteristics. The main results highlighted were the resting space of 14.6 m2 cow-1, most of the farms (87%) had newly built facilities and only 43.3% were built in E-W direction. Most farms did not have ridge opening and 60 % had fans in the bedded pack area, which is mostly stirred twice a day. About a third of the farms used CB only during the hottest hours of the day or rainy periods, with pasture access the remainder of the time. The bedded pack material averaged 48.4% DM, pH of 8.68, C:N of 5.90 and deep bedding temperature of 42.52 ⁰C. Locomotion scoring showed majority of the cows with a normal gait (95.5% of cows scoring 1 or 2 for locomotion). Hock lesions were observed in 15.5% of the animals and 84.0% of the cows were clean or only slightly dirty. This study indicates characteristics or issues to start an improvement process on CB usage in Brazilian subtropical region. The cow comfort was considered adequate, based on results of cow locomotion, lesions and hygiene scoring.

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mentioning

confidence: 88%

Section: Respiratory Rate and Skin Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Compost barns in Brazilian Subtropical region (Part 1): facility, barn management and herd characteristics

Radavelli

Danieli

Zotti

et al. 2020

RSD

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“…Os semivariogramas foram estimados por meio dos estimadores clássico de Matheron, conforme Eq. 1 citado por Mota et al (2019):…”

Section: Methodsunclassified

Bidimensional geostatistics as an alternative for modeling time series under climate change scenarios

Mota¹

2020

Pubvet

Self Cite

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O objetivo deste trabalho foi verificar o uso de modelos de semivariograma e krigagem ordinária para caracterizar e representar a dependência temporal da precipitação pluvial e da temperatura do ar, utilizando anos e meses como coordenadas referenciadas. Foram utilizados os dados de previsão de precipitação pluvial e temperatura do ar em cenários futuros de mudanças climáticas, de 2000 a 2099, do município de Juiz de Fora, MG. Com base nos semivariogramas experimentais e teóricos, considerando isotropia e anisotropia, foi constatada dependência temporal da precipitação pluvial, com melhor ajuste do modelo “wave”, quando comparado com os modelos gaussiano e esférico. A estrutura e a magnitude de dependência temporal das duas variáveis, em cenários futuros e nas direções 0º (meses) e 90º (anos), foram caracterizadas utilizando-se o arranjo proposto. Com o uso da geoestatística, o padrão da variabilidade temporal da precipitação pluvial e da temperatura do ar foi representado ao longo dos anos e dos meses por meio da interpolação de krigagem, verificando-se possíveis mudanças nos padrões de precipitação pluvial e temperatura, para os dados de previsão de mudanças climáticas, com maior alteração para o cenário mais pessimista.

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“…Previous studies on compost-bedded pack barn systems have used the approach related to spatial variability of the thermal environment. A study based on THI and specific enthalpy indices showed that ventilator operation with a range of up to 17 m during summer could not prevent high spatial heterogeneity in this type of housing [ 6 ]. The most homogeneous condition of the thermal environment in a compost barn system was under high-volume and low-rotation ventilation, which provided thermal comfort in more than 50% of the barn area [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Spatio-Thermal Variability and Behaviour as Bio-Thermal Indicators of Heat Stress in Dairy Cows in a Compost Barn: A Case Study

Vieira

Soares

Herbut

et al. 2021

Animals

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The spatial variability and behavioural aspects of compost-bedded pack barns remain unknown in subtropical regions. In this study, we investigated whether spatial variability occurs in the thermal environment of a compost barn and how the behaviour of dairy cows with different numbers of lactations differs in this system. The spatial sampling design comprised a grid of 108 locations inside the facility. At each location, we measured air temperature, relative humidity, wind speed, and bed temperature at 9:00, 12:00, and 15:00. We performed 24-h behavioural observations. Regarding spatial variability, the north face showed high air temperature values, and the distribution of relative humidity varied from the north to the south face. Kriging maps revealed a high bedding temperature trend, indicating heterogeneous ventilation management. Primiparous cows visited the water trough during the hottest hours of the day, whereas multiparous cows displayed a higher probability of walking during these periods. In conclusion, we observed a heterogeneous management of ventilation through the spatial distribution of the thermal environment inside the compost-bedded pack barn, with multiparous cows exhibiting dominance over primiparous cows seeking environmental resources.

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Caracterização da variabilidade espacial dos índices de conforto animal em sistemas de confinamento Compost Barn

Cited by 5 publications

References 16 publications

Compost barns in Brazilian Subtropical region (Part 1): facility, barn management and herd characteristics

Compost barns in Brazilian Subtropical region (Part 1): facility, barn management and herd characteristics

Bidimensional geostatistics as an alternative for modeling time series under climate change scenarios

Spatio-Thermal Variability and Behaviour as Bio-Thermal Indicators of Heat Stress in Dairy Cows in a Compost Barn: A Case Study

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