Data/hora: 01/06/2024 07:41:51

Provedor de dados: 	70	
País: 	Brazil	
Título: 	USE OF PROTECTION SCREEN IN CONVENTIONAL AVIARIES (CALIFORNIAN TYPE) FOR LAYING HENS	
Autores: 	Lourençoni,Dian; Yanagi Junior,Tadayuki; Oliveira,Daniela D. de; Lima,Renato R. de; Pena,Mariela R. da S.	
Data: 	2019-02-01	
Ano: 	2019	
Palavras-chave: 	Poultry farming; Animal welfare; Ambience; Thermal comfort index.	
Resumo: 	ABSTRACT The objective of this work was to evaluate the thermal environment inside conventional cages for laying hens, with and without the use of protective screens. This research was conducted in two conventional cages (open cage), where each cage had half of its area surrounded by high density polyethylene mesh (HDPE) with a diameter of 2.0 cm, and the other half was kept fully open. Hyline W-36 and Dekalb Brown laying hens were housed in these cages. The wind speed, dry bulb temperature (tdb), black globe temperature, humidity index (BGHI), and enthalpy (H) were analyzed. The results indicate that the use of the screen reduced the wind speed inside the cage by 0.22 m s−1. The presence of the screen affected tdb, BGHI, and H in some of the evaluated periods evaluated, making these values higher than those of the treatment without screen. However, the obtained values are within or below the thermal comfort range for laying birds. Therefore, the use of HDPE screen in the cages altered their internal environment. However, it is not enough to hinder the thermal comfort of the housed animals.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100048	
Editor: 	Associação Brasileira de Engenharia Agrícola	
Relação: 	10.1590/1809-4430-eng.agric.v39n1p48-54/2019	
Formato: 	text/html	
Fonte: 	Engenharia Agrícola  v.39 n.1 2019	
Fonte: 	info:eu-repo/semantics/openAccess