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Registros recuperados: 5
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Ammoniakfordampning fra udbragt gylle Organic Eprints
Sommer, Sven G.; Hansen, Martin N..
Landbruget er den primære kilde til ammoniak i atmosfæren. En af teknikkerne til at reducere ammoniakfordampningen er at udbringe gylle med slangeudlæggere. Med nogle enkle beregninger er der her foretaget et skøn af effekten af at udbringe gylle med slæbeslanger i vinterhvede for hver måned i perioden januar til juli.
Tipo: Report Palavras-chave: Air and water emissions.
Ano: 2004 URL: http://orgprints.org/5623/1/5623.pdf
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Emission and production of greenhouse gases and ammonia during storage of solids separated from pig slurry: effects of covering Organic Eprints
Hansen, Martin N.; Henriksen, Kaj; Sommer, Sven G..
Separation of slurry produces a solid fraction that is stored in manure heaps before being used as a fertiliser in crop production. Considerable amounts of ammonia (NH3) and greenhouse gases may be emitted during storage, which has deleterious environmental effects. The emission levels can be expected to depend on oxygenation level inside the bulk of the stored manure and therefore on storage conditions. An experiment was thus set up to study gaseous emissions during storage of the solid fraction, and the effects of the oxygenation of manure heaps on emissions of NH3 and various greenhouse gases. Emissions of NH3 and the greenhouse gases methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) from an uncovered and covered heap of solids separated from...
Tipo: Journal paper Palavras-chave: Air and water emissions.
Ano: 2006 URL: http://orgprints.org/5615/1/5615_ny.pdf
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Fuld udnyttelse af husdyrgødning Organic Eprints
Sommer, Sven G.; Hansen, Martin N.; Møller, Henrik B..
Vi vil i det følgende give en kort oversigt over nye teknologiske muligheder, som det økologiske jordbrug har til rådighed for en bedre håndtering af husdyrgødnings og en reduktion af uønskede sideeffekter ved anvendelse af gødning.
Tipo: Newspaper or magazine article Palavras-chave: Environmental aspects.
Ano: 2002 URL: http://orgprints.org/5618/1/fuld_udnyttelse_sendt.pdf
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Methane emissions from livestock manure - effects of storage conditions and climate Organic Eprints
Hansen, Martin N.; Sommer, Sven G.; Henriksen, Kaj.
Livestock manure contributes significantly to the global emission of methane (CH4). Methane is emitted during storage of both liquid and solid manure. Part of the solid manure is produced in loose housing systems with solid floors where the manure is stored in a deep litter mat, which is a mixture of straw, urine and faeces. As anaerobic conditions are found in the lower part of the deep litter mat, significant amounts of the carbon stored in the deep litter may be emitted as CH4. It has been estimated that a cattle deep litter mat contributed 11 to 18% of the total CH4 (from cattle digestion and litter) emitted. This source of CH4 does not seem to be included in the IPCC default value for solid manure. During outdoor storage of solid manure, CH4 can be...
Tipo: Conference paper, poster, etc. Palavras-chave: Air and water emissions.
Ano: 2002 URL: http://orgprints.org/3480/1/3480.pdf
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Reduction of ammonia emission by shallow slurry injection: Injection efficiency and additional energy demand Organic Eprints
Hansen, Martin N.; Sommer, Sven G.; Madsen, Niels P..
Ammonia (NH3) emission from livestock production causes undesirable environmental effects and a loss of plant available nitrogen. Much atmospheric NH3 is lost from livestock manure applied in the field. The NH3 emission may be reduced by slurry injection, but slurry injection in general, and especially on grassland, increases the energy demand and places heavy demands on the slurry injection techniques used. The reduction in NH3 emission, injection efficiency and energy demand of six different shallow slurry-injection techniques was examined. The NH3 emission from cattle slurry applied to grassland was reduced by all the injectors tested in the study, but there were major differences in the NH3 reduction potential of the different types of injectors....
Tipo: Journal paper Palavras-chave: Air and water emissions.
Ano: 2003 URL: http://orgprints.org/3306/1/3306.doc
Registros recuperados: 5
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