SEARCH
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:
Carcass composting for management of farm mortalities: A review
Posted in: Environment by admin on January 1, 2005 | No Comments
Gaseous Nitrogen and Carbon Losses from Pig Manure Derived from Different Diets
Posted in: Environment by admin on | No Comments
Manipulation of the diets of pigs may alter the composition of the manure and thereby the environmental and agricultural qualities of the manure. Laboratory studies were performed to quantify the effect of manipulation of pig diets on the chemical composition of the derived manure (slurry), the potential emission of methane (CH4) and ammonia (NH3) during anaerobic storage of the manure, and the potential nitrous oxide (N2O) and carbon dioxide (CO2) emission after application of the manure to soil. The diets differed in contents of crude protein and salt (CaSO4), and the type and contents of nonstarch polysaccha- rides (NSP). Emissions of NH3 and CH4 during storage were smaller at a low than at a high dietary protein content. The emission of NH3 was significantly related to the contents of ammonium (NH4), total N, and
pH. The emission of CH4 was significantly related to contents of dry matter, total C, and volatile fatty acids in the manure. The effect of manure composition on N2O emission markedly differed between ethe two tested soils, which points at interactions with soil properties such as the organic matter content. These types of interactions require soil-specific recommendations for mitigation of N2O emission from soil-applied pig manure by manipulation of the diet. From the tested diets, decreasing the protein content has the largest potential to simul- taneously decrease NH3 and CH4 emissions during manure storage and N2O emission from soil. An integral assessment of the environmental and agricultural impact of handling and application of pig manure as a result of diet manipulation provides opportunities for farmers to maximize the value of manures as fertilizer and soil conditioner and to minimize N and C emissions to the environment.
Management Strategy Impacts on Ammonia Volatilization from Swine Manure
Posted in: Environment by admin on | No Comments
Agronomic and Seed Traits of Soybean Lines with Low–Phytate Phosphorus
Posted in: Environment by admin on | No Comments
Engineering controls to reduce hydrogen sulfide exposure of workers in swine buildings
Posted in: Environment by admin on | No Comments
Three engineering control measures were developed and tested for effectiveness in protecting swine barn workers from exposure to hydrogen sulfide (H2S) gas during manure handling. A remote manure pit plug pulling system allowed the worker to pull the manure pit plug from outside the room, thereby significantly reducing risk of worker exposure to H2S. A water sprinkling apparatus was also devised, which resulted in 79% reduction of H2S gas concentration under optimal laboratory conditions. However, the use of a similar system on agitated manure showed the opposite effect. A manure scraper system was installed to remove manure daily from the manure pit of a grower-finisher room. Preliminary measurements showed that H2S levels were 80 to 96% lower in the scraper room than in a similar room with a conventional pull-plug system. However higher ammonia emissions were observed in the scraper room compared to the conventional grower-finisher room.
Managing ammonia emissions from livestock production in Europe
Posted in: Environment by admin on | No Comments
Sulfur and nitrogen emissions in the Czech Republic and Slovakia from 1850 till 2000
Posted in: Environment by admin on | No Comments