Respostas fisiológicas e produtivas de vacas holandesas em lactação submetidas ou não a sombreamento e aspersão na pré-ordenha

Cerutti, Weiler Giacomazza; Bermudes, Rogério Fôlha; Viégas, Julio; Martins, Cristian Marlon de Magalhães Rodrigues

doi:10.1590/s1519-99402013000300016

Cited by 14 publications

(18 citation statements)

References 15 publications

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“…S+S and S+S+V had average values of rectal temperature of 38.52 and 38.50 °C, respectively, representing an average reduction of 0.9 °C in rectal temperature when compared to EXT. Similar results were obtained by CERUTTI et al (2013), who reported a reduction of 0.6 °C in rectal temperature of cows submitted to climatization in pre-milking (shading and sprinkling) when compared to treatment without acclimatization.…”

Section: Resultssupporting

confidence: 87%

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Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

Silva

Passini

2017

Eng. Agríc.

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This research aimed to assess the climatization configuration in a holding pen for dairy cattle considering physiological responses of animals and thermal comfort indexes. Experimental design consisted of 16 cows in a Latin square design containing four groups of four animals (G1, G2, G3 and G4) and four periods (P1, P2, P3 and P4), in which four environments were used as treatments: EXT -external environment (control); SHA -shading with polypropylene mesh, 80% light interception; S+S -shading and water sprinkling; and S+S+V -shading, sprinkling and ventilation. Dry and wet bulb temperature, black globe temperature, wind speed and humidity were recorded during the climatization process, between October 13 and December 7. Subsequently, temperature-humidity index (THI), black globe temperature and humidity index (BGTHI), radiant heat load (RHL) and heat load index (HLI) were calculated. After climatization, respiratory rate (RR), surface temperature (ST), and rectal temperature (RT) were recorded. Animals submitted to EXT presented physiological responses that indicated heat stress. The best physiological response was found in S+S+V, which reduced RR by 58.6% when compared to the other environments.

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Section: Resultssupporting

confidence: 87%

“…Among the climatization techniques, shading has an important role in reducing the radiant heat load on animals . Water sprinkling is also an important technique that aims to speed up heat exchange by the evaporation process (SCHÜTZ et al, 2011;CERUTTI et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

Silva

Passini

2017

Eng. Agríc.

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“…Cerutti et al (2013), assessing the productive response of Dutch-breed animals to the sprinkling system in holding pen found a growth of 12.4% for the animals subjected to this system. Tresoldi, Schütz and Tucker (2016),working with Dutch cows and different cooling times, using high-flow sprinklers (0, 0.5, 1.5, 3 and 13 min., flow of 4.9 L min -1 ), verified cooling benefits, as well as changes in air temperature, more pronounced when water was sprinkled for longer (over 13 min.…”

Section: Resultsmentioning

confidence: 96%

“…Almeida, Pandorfi, Guiselini, Almeida and Morril (2010), in their turn, found an increase of 4.35% in the milk production of cows subjected to climatization with a similar system. Nevertheless, to analyze the viability of a climatization system, the productive response alone is insufficient, because the adoption of costly measures to mitigate the effects of thermal stress can make its use unfeasible, especially when the number of animals in production is not enough to dilute, in the short term, the fixed costs of the technology adopted, and productivity gains are not sufficiently high to offset the investment (Cerutti, Bermudes, Viegas, & Martins, 2013).…”

Section: Introductionmentioning

confidence: 99%

<b>Assessing different holding pen cooling systems through environmental variables and productivity of lactating cows

Silva

Passini

2017

Acta Sci. Anim. Sci.

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ABSTRACT. This studyaimed to assess different holding pen climatization systems for dairy cattle through environmental variables, milk production and economic indexes. Sixteen lactating cows were used, distributed in a 4 x 4 Latin square design consisting of four groups of four animals, assessed in four periods, seven days each, and in four holding pen environments: SUN-external environment (in the sun), SHA-80%-protection polypropylenemesh shading, SHA + SPR-80% polypropylene mesh shading + water sprinkling, SHA + SPR + VEN -80% polypropylene mesh shading + water sprinkling + ventilation. The animals remained for 30 minutes in their respective environments. In this period, environmental variables were collected using data loggers, and the milk produced, in kg, by each animal was subjected to the treatments. Fixed and variable costs were calculated for economic analysis. The SHA + SPR + VEN treatment presented itself as the best environment (p < 0.05), promoting an increase in the milk produced by the cows and in themonthly income, with 44 days for return on investment.Keywords: ambience, economic viability, dairy cows.Diferentes sistemas de resfriamento em sala de espera sobre variáveis ambientais e produtividade de vacas em lactação RESUMO. Este trabalho foi conduzido com o objetivo de avaliar diferentes sistemas de climatização em sala de espera para bovinos leiteiros, através das variáveis ambientais, produção de leite e índices econômicos. Foram utilizadas 16 vacas em lactação, distribuídas em um delineamento quadrado latino 4 x 4, constituído de quatro grupos de quatro animais, avaliados em quatro períodos, de sete dias cada e em quatro ambientes de sala de espera: SOL -ambiente externo (ao sol), SOM -sombreamento de malha de polipropileno 80% de proteção, SOM + ASP -sombreamento de malha de polipropileno 80% + aspersão de água, SOM + ASP + VENsombreamento de malha de polipropileno 80% + aspersão de água+ ventilação. Os animais permaneciam por 30 minutos em seus respectivos ambientes. Neste período, foram coletadas as variáveis ambientais, com o uso de data loggers, e a produção de leite, em kg, de cada animal submetido aos tratamentos. Foram calculados os custos fixos e variáveis para análise econômica. O tratamento SOM + ASP + VEN apresentou-se como o melhor ambiente (p < 0,05) promovendo aumento na produção de leite das vacas e na renda mensal, verificando-se um prazo de 44 dias para o retorno do investimento.Palavras-chave: ambiência, viabilidade econômica, vacas leiteiras.

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“…A maior CTR registrada nos horários mais quentes deve-se a maior incidência da radiação solar nestes horários. (CERUTTI et al, 2013).…”

Section: Resultsunclassified

Variáveis Fisiológicas, Produção E Qualidade Do Leite De Cabras Parda Alpina No Período Seco Do Semiárido

et al. 2019

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VARIÁVEIS FISIOLÓGICAS, PRODUÇÃO E QUALIDADE DO LEITE DE CABRAS PARDA ALPINA NO PERÍODO SECO DO SEMIÁRIDO JACIARA RIBEIRO MIRANDA1; DERMEVAL ARAÚJO FURTADO2; JOSÉ PINHEIRO LOPES NETO3; JOSÉ WALLACE BARBOSA4; JOAQUIM REGIS MALHEIROS FILHO5 Engenharia Agrícola, Universidade Federal de Campina Grande, Rua Aprígio Veloso, 882 - Universitário, 58429-900, Campina Grande, Paraíba, Brasil,1jaciara-miranda@hotmail.com; 2araujodermeval@gmail.com; 3lopesneto@gmail.com; 4wallacebosa@hotmail.com; 5malheirosfilho@yahoo.com.br. RESUMO: O objetivo do trabalho foi avaliar o efeito do ambiente sobre as variáveis fisiológicas, desempenho produtivo e qualidade do leite de cabras de três grupos genéticos, Parda Alpinas, ¾ Parda Alpina + ¼ SRD e ½ Parda Alpina + ½ SRD, no período seco no semiárido paraibano. O delineamento estatístico utilizado foi o inteiramente casualizado, com 3 tratamentos e 9 repetições, sendo os dados submetidos à análise de variância e as médias comparadas pelo o teste de Tukey a 5 %. Conclui-se que nas condições do ambiente estudado, as cabras Parda Alpina, das composições genéticas ½, ¾ e pura, conseguiram manter a homeotermia, utilizando de forma semelhante o aumento da frequência respiratória nas horas mais quentes do dia. A composição ¾ Parda Alpina apresentou maior produção de leite, sendo o grupo indicado para ser explorado nas condições do presente estudo, sendo que a qualidade do leite não foi afetada pela composição racial. Não ocorreu diferença significativa entre os componentes do leite entre os grupos genéticos e os animais ½ Alpina apresentam menores valores de contagem de células somáticas entre os grupos genéticos, sendo estes mais adaptados às condições ambientais e menos susceptíveis às infecções da glândula mamária. Palavras-chaves: ambiência, contagem de células somáticas, caprinocultura, grupo racial, produção leiteira. PHYSIOLOGICAL VARIABLES, PRODUCTION AND QUALITY OF ALPINE GOATS MILK IN THE SEMIARID IN THE DRYING PERIOD ABSTRACT: The aim of this study was to verify the effect of the environment on the physiological variables, productive performance and milk quality of goats from three genetic groups, Parda Alpines, ¾ Parda Alpine + ¼ SRD and ½ Parda Alpine + ½ SRD, in semi-arid dry period in Paraiba State. The statistical design used was completely randomized, with 3 treatments and 9 replicates. The data were submitted to analysis of variance (ANOVA) and the means were compared by Tukey test at 5% of significance. It was concluded that Parda Alpina goats, from genetic compositions ½, ¾ and pure, were able to maintain the homeothermia, similarly using increased respiratory rate during the hottest hours of the day. The composition ¾ Parda Alpina + ¼ SRD presented higher milk production, being the group indicated to be explored under the conditions of this present study, milk quality was not affected by racial composition. There was no significant difference between milk components between the genetic groups and the ½ Alpine animals, showing lower values of somatic cell counts among the genetic groups, turn them more adapted to the environmental conditions and less susceptible to mammary gland infections. Keywords: ambience, somatic cell count, goat breeding, racial group, dairy production

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Respostas fisiológicas e produtivas de vacas holandesas em lactação submetidas ou não a sombreamento e aspersão na pré-ordenha

Cited by 14 publications

References 15 publications

Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

Physiological Responses of Dairy Cows as a Function of Environment in Holding Pen

<b>Assessing different holding pen cooling systems through environmental variables and productivity of lactating cows

Variáveis Fisiológicas, Produção E Qualidade Do Leite De Cabras Parda Alpina No Período Seco Do Semiárido

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