The air in floor housing systems for laying hens may be more polluted than in traditional cage systems since gases are emitted from large exposed surfaces of manure and litter. In order to study odour and ammonia concentrations and emissions at different climatic conditions a small scale poultry house (climate chamber) was equipped with a floor housing system were 356 laying hens were kept. Tem...

Direct measurement of ventilation rate in livestock housing can be a formidable task due to uncontrollable variations in fan and system performance as caused by factors such as operation static pressure, fan belt condition, and dust accumulation on shutters and blades. Indirect, CO2-balance method offers a potentially viable, more flexible alternative to estimating ventilation rate. The reliabi...

Endotoxins as components of organic dust may have adverse effects on the respiratory health of workers in poultry buildings. The move towards more welfare-friendly housing systems for layers may increase worker exposure to air contaminants due to the use of litter. The endotoxin concentrations in the inhalable fraction of airborne dust (below 100 µm) from cage and alternative system houses (on-...

Fractures of the keel bone in laying hens occur frequently within free-range systems and are a significant welfare concern. As poultry farmers have increasingly adopted this type of housing, it becomes more urgent to address the problem of such fractures. More than 80% of free-range birds could be affected, compared to 36% of birds in furnished-cage systems (Wilkins et al., 2011). A hen’s abili...

NEURAL NETWORKS by LIN LIU (Under the Direction of Takoi Hamrita) ABSTRACT To understand the relationships among ambient temperature (AT), relative humidity (RH) and broiler deep body temperature (DBT), controlled experiments were conducted for different RH (50 and 80%) and AT (31, 34 and 37C) combinations. The DBT measurements were collected by a radio biotelemetry system. Three types of Artif...

Decontamination of poultry or animal housing areas over the last few decades has often involved the use of formaldehyde gas which, although very effective [l, 2,3,4], is a known carcinogen [4]. Various approaches have been used to release the gas, which is usually generated by adding formalin to potassium permanganate. The process by which the gas is generated has varied over the years from man...

The new legislation for laying hens in the European Union put a ban on conventional cages. Production systems must now provide the hens with access to a nest, a perch, and material for dust bathing. These requirements will improve the behavioral aspects of animal welfare. However, when hens are kept with access to litter, it is a concern that polluted air may become an increased threat to healt...

Livestock scale breeding is the inevitable trend of future livestock and poultry husbandry. Closed requires excellent environment housings contain a lot dust, pathogenic microorganisms harmful gases, affecting health personnel. Most common sterilization dust collection devices for on market are too high energy consumption, easy to cause secondary pollution. Therefore, an environmental purificat...

The present study was carried out for six weeks, from November 21st, 2013 to January 03rd, 2014 at Government poultry farm, Khatipura, Jaipur. A total of 135 dayold Giriraja chicks were divided into three treatment groups of 45 chicks which were further subdivided into three equal replicates of 15 chicks each. The synthetic and herbal vitamin C were supplemented through drinking water at the ra...