Consulta: creatorFacets:"Andrade,Rafaella R."
Registros recuperados: 3
Data/hora: 12/06/2024 12:40:01

INFLUENCE OF DIFFERENT THERMAL ENVIRONMENTS ON THE PERFORMANCE OF LAYING HENS DURING THE INITIAL STAGE OF REARING
Provedor de dados: 70
Autores: Andrade,Rafaella R.; Tinôco,Ilda de F. F.; Baêta,Fernando da C.; Albino,Luiz F. T.; Cecon,Paulo R.
ABSTRACT This study was conducted with the aim of assessing the effects of different ambient temperature values on the performance of laying birds from one to 42 days of age in order to obtain optimal comfort temperatures. A total of 864 laying hens were distributed in four climatic chambers with different temperature ranges. One of the chambers was maintained within the thermal range recommended by the literature and the others were maintained under temperatures that consisted of mild and moderate cold stress and moderate heat stress. The experiment was conducted according to a completely randomized design in a split-plot arrangement and six replications. The data were analyzed by means of the analysis of variance and regression. The final performance of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ambience; Zootechnical performance; Cold stress; Light laying hens; Thermoneutrality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100032

ACOUSTIC ENVIRONMENT AND GAS PRODUCTION IN DIFFERENT GROWING-FINISHING SWINE FACILITIES
Provedor de dados: 70
Autores: Andrade,Rafaella R.; Campos,Alessandro T.; Cecchin,Daiane; Sousa,Francine A.; Amaral,Pedro I. S.
ABSTRACT This study aimed to evaluate gas levels and the acoustic environment (noise) of growing-finishing swine in different facilities, one composed of shallow pool (SP) and another of partially slatted floor (PSF). Sensors and a sound level meter were used to measure gas concentrations (CO2 and NH3) and noise at 1.50 meters above the ground and at animal height. Data on gas concentrations and noise levels were measured at 9am, 12pm, and 3 pm. Results showed differences (P&lt;0.05) between noise levels at animal height and gas concentrations measured in relation to stall type and data collection time. The highest noise values were found in the shallow pool stall, measured at animal level. The highest NH3 (13 ppm) and CO2 (1174.5 ppm) values were observed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ambience; Welfare; Air quality; Noise.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000600953

Difusividade e condutividade hidráulica não saturada de substratos
Provedor de dados: 91
Autores: Conceição,Beatriz S.; Lima,Luiz A.; Sant'Ana,José A. do V.; Silva,Elio L. da; Andrade,Rafaella R.
A quantificação dos processos hidráulicos que ocorrem dentro do recipiente durante e entre irrigações, é essencial para a gestão eficaz da irrigação e adubação em substratos. Os testes foram feitos no laboratório de hidráulica da Universidade Federal de Lavras com o objetivo de determinar a condutividade hidráulica não saturada de substratos usando-se o método proposto por Bruce &amp;amp; Klute (1956) em seis substratos (S1, S2, S3, S4, S5 e S6) com quatro repetições. Foram realizados ensaios de fluxo horizontal visando estimar a difusividade e, por seu meio, a condutividade hidráulica não saturada (K(θ)). A taxa com que a umidade avança no espaço e no tempo ocorre de maneira diferenciada entre os substratos avaliados destacando-se os substratos S5 (casca...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Processos hidráulicos; Fluxo; Movimento de água.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000600007