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Industry Partners
Prairie Swine Centre is an affiliate of the University of Saskatchewan
Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.
Financial support for the Enterprise Model Project and Pork Insight has been provided by:
Odour Nuisance from Livestock Production Systems
Posted in: Environment by admin on January 1, 1996 | No Comments
Effective economic methods are needed to control offensive odours arising from the storage and landspreading of slurries and solid manure and from livestock buildings. Odour concentration in air can be determined through the use of a dynamic dilution olfactometer and a panel of people. The use of micrometeorological or wind tunnel techniques, enable rates of odour emission to be calculated during and after spreading wastes on land.
The highest rates of emission occur during and for the first few hours after spreading. These rapidly decline to much lower levels, which normally persist for 2-3 days with small diurnal fluctuations, reflecting changes in wind speed and possibly, air temperature. A wide range of animal, management and environmental factors influences rates of emissions. Methods for reduction include anaerobic digestion or aerobic treatment of slurries prior to storage, direct injection into soil or, on arable land, rapid incorporation by ploughing or rotavation. There is less information on odour emissions from livestock buildings which are often much greater than those from land, especially from mechanically ventilated pig and poultry houses. Frequent removal of wastes, or cleaning exhaust air by means of a biofilter or bioscrubber can be effective in reducing these emissions.
Relationships between odour concentration and odour intensity (the perceived strength) suggest that, in many instances, >90% reduction in concentration is needed for effective abatement.
The Estimatation of DE Content in Barley
Posted in: Prairie Swine Centre by admin on | No Comments
Evaluation of feeders for growing and finishing pigs
Posted in: Prairie Swine Centre by admin on | No Comments
Twelve commercial feeders were evaluated in 4 pens of 12 pigs each during the 12-wk growing/finishing period. Feeders were classified according to their feed form (dry vs. wet/dry) and space (single vs. multiple space). In total there were 2 single-spaced dry (SS-D), 3 single spaced wet/dry (SS-WD). Average daily gain and feed disappearance were 5% greater with wet/dry feeders than with dry. The effect of wet/dry feeders on growth was only evident during the final 8 wk of the trial, while feed disappearance tended to be higher throughout. Carcasses of pigs fed from dry feeders yielded a higher lean percentage than did those of pigs fed from wet/dry feeders. Single and multiple space feeders did not differ in gain or feed disappearance at any point during the trial. Feed efficiency did not differ among feeder classes.
Dim light does not reduce fighting or wounding of newly mixed pigs at weaning.
Posted in: Welfare by admin on | No Comments
Managing Odors from Swine Waste AEU-8
Posted in: Environment by admin on | No Comments
Odours are difficult to measure as well to manage. As we see an increasing trend to more intensive livestock operations odours will become a larger issue that must be dealt with. The most effective way to control odour is to indentify the source and take corrective action to eliminate it. Odour sources can be divided into three categories: (1) building and facilities (2) Outside storage systems (3) land application. Sources of odours in and around buildings include: wet dirty floors and spilled, moldy feed to name a few. The solutions for building odours can be based on best management practices, keep the facilities clean. Management also plays a key role in the management of odour of lagoons: control the pH and cover whenever possible. Land application should include direct injection, as well taking into account prevailing winds on days of application. Producers must recognize, how ododur effects individuals is based on perception, therefore must develop a sensitivity and effective resposne to neighbours perceptions.
The Diversity Exhibited by Streptococcus Suis
Posted in: Prairie Swine Centre by admin on | No Comments