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The temperature in the broiler area is often below the recommended during the first week. The air movements are negligible and temperature differences will arise in the building. In the end of the breeding it is often too warm in the building. …
G. Gustafsson, E. von Wachenfelt
The hygienic threshold limit values for ammonia (25 ppm) for animal welfare but also for occupational safety and health is often exceeded in floor housing systems for laying hens with long time storage of manure in bins below draining floors. The major …
G. Gustafsson, E. von Wachenfelt
How different factors and techniques affect concentration and generation of dust in a floor housing system for laying hens were investigated in a climate chamber. The efficiencies of different dust reducing measures were investigated.
G. Gustafsson, E. von Wachenfelt
E. von Wachenfelt, G. Gustafsson
G. Gustafsson, E. von Wachenfelt
G. Gustafsson, E. von Wachenfelt
How age of hens, storage time of manure, ventilation rate, ventilation technique and bedding materials affect concentration and release of ammonia in a floor housing system for laying hens have been carried out at the Department of Agricultural Biosystems and Technology (JBT) …
se (code pays fourni par la source)
Bolanle Adenike Adejumo, J. Adetunji, E.A. Ajav, E. Ajisegiri et autres
E. von Wachenfelt, Simon Pedersen, G. Gustafsson
1. Production of total heat, divided into sensible and latent heat, together with carbon dioxide and animal activity were determined at different ambient temperatures under full-scale conditions in an aviary system with loose-housed laying hens. 2. Sensible heat production decreased approximately linearly …
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H.H. Ellen, R. W. Bottcher, E. von Wachenfelt, Hisamitsu Takai
This article summarizes information from the papers and posters presented at the international symposium on "Dust Control in Animal Production Facilities", held in Aarhus (Denmark) on 30 May-2 June 1999. Dust concentrations in poultry houses vary from 0.02 to 81.33 mg/m3 for …
G. Gustafsson, E. von Wachenfelt
se (code pays fourni par la source)
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