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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:
Gaseous Emissions from Manure Management Systems – An Overview
Posted in: Environment by admin on January 1, 1998 | No Comments
Cuurently some nutrient management plans in the United States are based on live animal weight for a production unit. As the swine industry has intensified the size of the earthen manure storage has also increased. Newly constructed, larger manure storage facilities contain a higher total nitorgen level than smaller facilities, has resulted in cases where insufficient land was available to receive manure at the planned rate. Manure volatilization occurs at a very consistent rate of volatization, which keeps the total nitrogen at a fairly consistent level. Volatization rate will be dependant on several factors such as pH, temperature and lagoonm design. Therefore future nutrient management plans may need to incorporate design characteristics of the manure storage facility, rather than on animal weight alone.
Anaerobic Lagoon Liquid Balance
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Animal Waste BMP's and the Bacteriological Quality of Surface Water
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Non-point source pollution ranks as the largest single impairment to water quality in the United States with Agriculture being the leading source (USEPA, 1997). Best Management Practices (BMPs) have been designed and adopted in an effort to reduce surface and ground water contamination from Agricultural sources. The Owl Run watershed was monitored for a period of 10 years, including 2.5 years of extensive monitoring prior to establishing BMPs. Several BMPs were established in targeting better management of animal waste these included: conversation tillage, field strip cropping, grassed waterway and alternative livestock water sources. Water samples were collected on a bi-weekly basis and analyzed for feacl coliform anf fecal streptococcus bacteria.
Mean fecal coliform bacteria were reduced by 40% at the waterrshed outlet with the implementation of BMPs. However, all sub-watershed stations indicated increases in overall fecal coliform levels from 9% – 94% during the post-BMP period. Fecal streptococcus bacteria were reduced by 80% at the watershed outlet, with the sub-watersheds experiencing reductions between 59% – 69%. The fecal coliform to fecal streptococcus bacteria ratio was applied to the watershed as an indictation of the source of pollution. Throughout the duration of the experiment, pre and post-BMP phases has ratios that indicated domestic animal were the principal cause of feacl pollution. Reductions in bacteria levels were also citied during the winter months with the implementation of the BMPs. This reduction can be explaned through the storage of manure throughout winter months, increasing the flexibility in timing of land application. Increases in the spring are most likely due to the more intensive application of manure throughout that period.
EFFECTS OF SWINE LAGOON EFFLUENT APPLICATION ON CHEMICAL PROPERTIES OF A LOAMY SAND
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Ammonia Emission from a Large Mechanically-Ventilated Swine Building During Warm Weather
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Ammonia emissions were measured in a 100 head grower-finisher operation in the mid-west United States between June – September 1997. This study examined the impact number of hogs (and their respective weight), ventilation rate and temperature (indoor and outdoor) has on the ammonia concentration levels in a mechanically ventilated operation. As well determining appropraite measurement locations in order to gather reliable ammonia emissions data. Throughout the study the average ammonia emission concentration was 5.4 +/- 0.41 ppm, however significant differences were found between pit head space, pit fans and wall fans, as well ammonia concentration in the building was found to be inverselt porportional to the ventilation rate. The avearge daily ammonia emission was 11.2 kg/day, or 122 g/d per 500 kg of body weight, and was found to be directly porportional to the ventilation rate, pig number and indoor temperature.
Feeding Strategies for Manipulating Manure Content
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A review of the different dietary manipulation and additives supplementation that can be done is presented. Nutritional management by the reduction of mineral excretion by improvement of the nutrients use and herd management by the selection of farm animals that present a better feed conversion and mineral retention are important aspects in nutrients efficiency. Diet formulation that is done to be the closer to the animal’s requirements and the use of synthetic amino acids, enzymes and approved growth promoter are other steps that can be take to better utilize the nutrients by the animal.
Simulating NO3-N to Tile Drainage from Manure Plots
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Methane Recovery from Animal Manures The Current Opportunities Casebook
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NITRIFICATION LIMITATION IN ANIMAL SLURRIES AT HIGH TEMPERATURES
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