Influência do ambiente no consumo de água de bebida de vacas leiteiras

Perissinotto, M.; Moura, Daniella Jorge de; Silva, Iran J. O. da; Matarazzo, Soraia Vanessa

doi:10.1590/s1415-43662005000200022

Cited by 14 publications

(9 citation statements)

References 4 publications

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“…Under heat stress, animals change their behavior to reduce the amount of endogenous heat produced and promote heat loss (Schütz, Rogers, Cox, Webster, & Tucker, 2011). Thus, the daily grazing time is reduced, while the time spent for resting and drinking water increases (Perissinotto, Moura, Silva, & Matarazzo, 2005;Silva et al, 2009). Reduction in grazing activity decreases dry matter intake, with negative effects on body weight gain, milk yield, and reproductive efficiency, leading to economic losses resulting from such less than optimal herd performance (Almeida, Pandorfi, Guiselini, Henrique, & Almeida, 2011;Soren, 2012;Mellado et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Thermal comfort and grazing behavior of Girolando heifers in integrated crop-livestock (ICL) and crop-livestock-forest (ICLF) systems

Souza

Salman

Cruz

et al. 2019

Acta Sci. Anim. Sci.

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To compare the integrated crop-livestock-forest (ICLF) and crop-livestock (ICL) systems in relation to thermal comfort and grazing behavior of Girolando heifers, a 2 × 2 crossover trial (two system and two periods) was carried out with eight ¾ Holstein × ¼ Gyr heifers in Xaraés–palisade grass pasture under intermittent stocking with 10 days of occupation period and 20 days of resting. In ICLF, crown cover of eucalyptus planted in rows was 65% at the beginning of the experiment. Animal behavior was assessed through bioacoustics by recording heifers’ sounds for 48 hours. Concomitantly, heifers’ internal temperature (IT,°C) was recorded every 10 min using data logger thermometers adapted to hormone-free intravaginal devices. Air temperature and humidity data were collected by thermohygrometers located in the center of ICLF and ICL for calculating Temperature–Humidity Index (THI). According to THI values, ICLF and ICL did not vary in terms of thermal comfort. However, THI indicated moderate stress (82.26±4.40) during day (06:00 to 17:59h) and mild stress (75.76±4.38) at night (18:00 to 05:59h) in both systems. During day, heifers from ICL had significantly (p < 0.05) higher IT (39.51±0.56oC) than those from ICLF (39.41±0.56oC); the former spent more time grazing and less time drinking water in ICLF (581.35±30.1 and 4.87±1.09 min, respectively) when compared with those from ICL (436.88±28.1 and 10.25±1.09 min, respectively). Therefore, although thermal comfort index did not vary between the systems, under moderate stress, crossbred heifers have lower internal temperatures, resulting in longer diurnal grazing and shorter water drinking time in Eucalyptus-shaded pastures.

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Section: Introductionmentioning

confidence: 99%

Thermal comfort and grazing behavior of Girolando heifers in integrated crop-livestock (ICL) and crop-livestock-forest (ICLF) systems

Souza

Salman

Cruz

et al. 2019

Acta Sci. Anim. Sci.

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“…According to Perissinotto et al (), in addition to climatic factors (temperature and humidity), animal comfort is affected by the adaptation of the animal and its metabolic level. According to these authors, the reduction in feed intake, the increase in water intake and the decrease in activity at the hottest times of the day are some of the mechanisms that animals make use of as an attempt to fight excess temperature.…”

Section: Resultsmentioning

confidence: 99%

Ingestive behavior of supplemented Nellore heifers grazing palisadegrass pastures managed with different sward heights

Vieira

Azenha

Casagrande

et al. 2016

Animal Science Journal

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Three sward heights (15, 25 and 35 cm) and three supplement types (energy, energy-protein, and a mineral mix supplement) were evaluated in a 3 × 3 factorial arrangement distributed in a completely randomized design to study changes in forage search patterns in Nellore heifers in a continuous grazing system. Pasture data were collected using two replicates (paddocks) per treatment over four periods during the rainy season. The behavior assessments were made in the first and fourth grazing seasons. It was hypothesized that supplements and pasture management would modify ingestive behavior, considering that animals would require less time grazing if they had energy requirements met through higher digestibility of better managed paddocks, or use of supplements high in energy. Total and green forage masses along with green : dead material ratio were greater in treatments managed with higher sward heights. Sward managed with 35 cm height resulted in lower leaf : stem ratio compared with 15 cm sward height treatments. The animals on the 15 cm pastures spent more time grazing overall and during each meal, but there were no differences observed in meal numbers in comparison to 35 cm treatments. Heifers fed protein and/or energy supplements spent less time grazing in the early afternoon, but overall grazing time was the same for all animals.

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“…Foi constatado que um dos mecanismos para combater o excesso de temperatura, é o aumento na ingestão hídrica. Em seu estudo, Perissinoto (2005) observou que os animais dobraram a quantidade de agua ingerida em dias quentes, passando para 63,8L ingeridos, em contraste com 37,3L em dias com menores temperaturas. Sendo o maior momento de ingestão em dias e em horários mais quentes, e após a ordenha, relacionado à reposição e de acordo com o nível produtivo individual.…”

Section: Estratégias Para Obtenção Do Conforto Térmicounclassified

Conforto Térmico De Vacas Leiteiras Na Amazônia - Revisão De Literatura

Souza¹,

Castro²,

Santos³

et al. 2021

ArqVet

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O estresse térmico é um dos principais problemas relacionados ao decréscimo do bem-estar animal em vacas leiteiras. Entre as regiões do Brasil, a Amazônia se destaca em suas características climáticas como os altos índices de temperatura e umidade atmosférica oriundos de uma região de clima equatorial. Neste cenário, o estresse térmico é um dos fatores que prejudicam a criação, a produtividade, os parâmetros fisiológicos e o comportamento dos animais. Nesse sentido, o presente artigo de revisão visa contextualizar as características regionais com a produção leiteira na Amazônia, destacando o estresse térmico, seus efeitos e as estratégias de conforto térmico. Dessa forma, o emprego de medidas como o melhoramento genético, adoção de sistemas de produção silvipastoris e implantação de tecnologias são maneiras eficazes de melhoria das condições climáticas para os animais. No entanto, salienta-se a importância da realização de estudos específicos para determinação dos parâmetros de conforto térmico das vacas leiteiras na Amazônia.

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Influência do ambiente no consumo de água de bebida de vacas leiteiras

Cited by 14 publications

References 4 publications

Thermal comfort and grazing behavior of Girolando heifers in integrated crop-livestock (ICL) and crop-livestock-forest (ICLF) systems

Thermal comfort and grazing behavior of Girolando heifers in integrated crop-livestock (ICL) and crop-livestock-forest (ICLF) systems

Ingestive behavior of supplemented Nellore heifers grazing palisadegrass pastures managed with different sward heights

Conforto Térmico De Vacas Leiteiras Na Amazônia - Revisão De Literatura

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