Modeling of Dust Concentrations Distribution in a Simulated Swine Room Under Non-Isothermal Conditions

Posted in: Environment by admin on January 1, 1999 | No Comments

Experimental and numerical modeling were conducted to determine the dust concentration distribution in a simulated mechanically ventilated swine nursery room under non-isothermal conditions. Effects on dust generation rate, temperature difference between air supply and inside air, dust source location, and presence of obstructions on dust concentrations were also evaluated. Resulst from the numeric modelling agreed with the measured values indicated that the dust source location significantly influenced the dust concentration distribution; dust concentration was higher at or near the source. However, the effect of temperature difference beyween supply air and inside air, dust generation rate and the presence of the mick pigs on dust concentration distribution were not statistically significant.

Manure Management Systems Plans in the Context of Michigan Right to Farm Generally Accepted Agriculture and Management Practices

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Michigan adopted right to farm generally accepted agricultural management practices for manure management in 1998. They are revised annually and were most recently rrevised in November 1988. They define what is to be included in a manure management system plan and are more comprehensive than the recently released unifed national strategy for animal feeding operations. The Michigan Agricultural Environmental Assurance Program (MAEAP) has been developed to address environmental issues related to animal feeding operations.

Genetically-Engineered "EnviroPigs" Produce Less Phosphorus

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ODOR EMISSION FROM MIXTURES OF GROUND SWINE CARCASS MATERIAL AND LIQUID SWINEWASTE

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Factors affecting Nitrogen Transformations and Related Nitrous Oxide Emissions

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Effectiveness of 3 Manure Pit Additives Document

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The DE content of hull-less barley

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Hull-less barley is used as a source of energy and amino acids in swine rations in Western Canada but is characterized poorly in terms of DE content. Our objective was to determine the DE content of cleaned hull-less barley in relation to barley, wheat, and triticale. Chemical characteristics were analyzed to enable subsequent calculation of prediction equations. The DE content of cleaned hull-less barley was equal to that of wheat. We were able to predict the DE content of hull-less barley accurately by using starch, neutral-detergent insoluble nitrogen (NDIN) and neutral-detergent fibre (NDF) analyses.

Travel sickness and meat quality in pigs.

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The effects of environmental enrichment and intermittent lighting on the behaviour and welfare of male domestic turkeys.

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Does pecking at inanimate stimuli predict cannibalistic behaviour in domestic fowl?

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Cannibalism involves the pecking and tearing of skin and underlying tissues of another bird. It is a serious welfare problem in egg laying stains of domestic fowl. This study assessed the pecking behaviour of caged White Leghorn hens towards feather-shaped stimuli varying in colour (red or blue), material (paper or feather) and movement (stationary or movable) attached to a board placed in the feed trough. Each of the eight stimulus combinations was presented to two replicate groups of 5 young hens for 15 min at 45 and 57 days of age. Severe pecks were directed more frequently at feathers than paper stimuli and at movable than stationary stimuli but there was no differential response to red and blue stimuli. When reassessed the responses to the stimuli in groups of four hens at 696 and 710 days of age the study found no significant effects of colour, material or movement on the latency to peck the stimuli, or the frequency of gentle and severe pecks at the stimuli. There was a positive correlation between the frequency of severe feather pecking at flock mates and the frequency of cannibalistic behaviour. This study did not find significant correlation between the frequency of pecking at the inanimate stimuli and the frequencies of pecking at the flesh and feathers of flock mates. In summary it is concluded that the frequency of pecking at inanimate stimuli was not a good predictor of future cannibalistic behaviour by hens in this study.