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| Cecchin,Daiane; Campos,Alessandro T.; Cruz,Vasco F. da; Sousa,Francine A.; Amaral,Pedro I. S.; Yanagi Junior,Tadayuki. |
| ABSTRACT The objective of this study was to evaluate the concentration of gases in three swine growing and finishing facilities with different building typologies, regarding floor and dividers. The experiment compared three treatments: pen with water depth, pen with partially slotted floor on the sides, and pen with partially slotted floor on sides and in the center. Measurements of instantaneous concentrations of ammonia (NH3 ppm) and carbon dioxide (CO2 ppm) were taken at animal level. The levels of sound pressure (dB) at animal level and at 1.50 m from the floor were also recorded. It was observed that the pen with water depth was the one with the highest average concentration of NH3. Although there was a significant difference in CO2 concentrations,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Rural buildings; Gas concentration; Sound pressure. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500339 |
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| Almeida,Gledson L. P. de; Pandorfi,Héliton; Baptista,Fátima; Guiselini,Cristiane; Cruz,Vasco F. da; Almeida,Gleidiana A. P. de. |
| ABSTRACTThe objective of this study was to evaluate programs of supplementary lighting for calves in individual shelters with different roof materials, as a strategy to stimulate concentrate consumption and the reduction of the milk feeding period and increase financial viability. Twenty seven dairy crossed Holstein × Gir female calves were randomly distributed in individual shelters with three different roofing materials (cement fiber tile, recycled tile and thatched roofs), associated with three different light duration (12, 16 and 20 h) and with three repetitions. The experimental design was completely randomized in 3 × 3 factorial arrangement. There was no interaction between the types of roofs × supplemental light; also, there was no significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Dairy cattle; Economic viability. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001000989 |
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