Manipulation of Dietary Protein and Nonstarch Polysaccharide to Control Swine Manure Emissions
| Autor: | Soenke Moehn, Jason Price, Ike Edeogu, Jeremy Leonard, O. Grant Clark |
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| Rok vydání: | 2005 |
| Předmět: |
Time Factors
Environmental Engineering Swine Nitrous Oxide chemistry.chemical_element Management Monitoring Policy and Law chemistry.chemical_compound Animal science Polysaccharides Animals Animal Husbandry Beet pulp Waste Management and Disposal Water Science and Technology Air Pollutants Chemistry Phosphorus Nitrous oxide Biodegradable waste Carbon Dioxide Hydrogen-Ion Concentration Animal Feed Pollution Manure Biochemistry Odor Odorants Carbon dioxide Xylanase Dietary Proteins Methane Sulfur |
| Zdroj: | Journal of Environmental Quality. 34:1461-1466 |
| ISSN: | 0047-2425 |
| DOI: | 10.2134/jeq2004.0434 |
| Popis: | Odor and greenhouse gas (GHG) emissions from stored pig (Sus scrofa) manure were monitored for response to changes in the crude protein level (168 or 139 g kg(-1), as-fed basis) and nonstarch polysaccharide (NSP) content [i.e., control, or modified with beet pulp (Beta vulgaris L.), cornstarch, or xylanase] of diets fed to pigs in a production setting. Each diet was fed to one of eight pens of pigs according to a 2 x 4, full-factorial design, replicated over three time blocks with different groups of animals and random assignment of diets. Manure from each treatment was characterized and stored in a separate, ventilated, 200-L vessel. Repeated measurements of odor, carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions from the vessels were taken every two weeks for eight weeks. Manure from high-protein diets had higher sulfur concentration and pH (P < or = 0.05). High-NSP (beet pulp) diets resulted in lower manure nitrogen and ammonia concentrations and pH (P < or = 0.05). Odor level and hedonic tone of exhaust air from the storage vessel headspaces were unaffected by the dietary treatments. Mean CO2 and CH4 emissions (1400 and 42 g d(-1) m(-3) manure, respectively) increased with lower dietary protein (P < or = 0.05). The addition of xylanase to high-protein diets caused a decrease in manure CO2 emissions, but an increase when added to low-protein diets (P < or = 0.05). Nitrous oxide emissions were negligible. Contrary to other studies, these results do not support the use of dietary protein reduction to reduce emissions from stored swine manure. |
| Databáze: | OpenAIRE |
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