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| Registros recuperados: 13 | |
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| Gattinger, Andreas; Skinner, Colin; Krauss, Maike; Mäder, Paul. |
| Despite the increase in organic cropland, knowledge on the impact of organic farming on soil-derived nitrous oxide (N2O) and methane (CH4) emissions is rather limited. To improve the knowledge base, N2O and CH4 fluxes were investigated in a 571 day lasting cropping sequence in the “DOK” field trial. Two organic and two non-organic farming systems and an unfertilized control were chosen. For the whole monitoring, the two organic systems combined emitted 40% less N2O than the two non-organic ones cumulated on area-scale. Yield-scaled cumulated N2O emissions were nearly 10% lower for the organic systems combined, despite the yield gap of 27%. We found that besides N input, management induced soil quality properties drive differences in N2O emissions between... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions. |
| Ano: 2019 |
URL: http://orgprints.org/36205/1/Beitrag_278_final_a.pdf |
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| Müller, Adrian; Aguilera, Eduardo; Skinner, Colin; Gattinger, Andreas. |
| A recent study by McGee (Agriculture and Human Values, 32, 255–263, 2015) from the University of Oregon has led to discussions in international media and on the web. This study addresses an interesting question and applies advanced statistics for its analysis. However, we identify several methodological flaws that invalidate the results. First, McGee tests a hypothesis that does not correspond to his main question and which does not allow McGee to derive the conclusions that are drawn in his paper and reported in the media coverage. Second, the data used are not adequate for the analysis because: i) the dependent variable does not reflect the greenhouse gas emissions characteristics of organic agriculture (e.g. different emission factors in organic and... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry; Air and water emissions; Policy environments and social economy. |
| Ano: 2016 |
URL: http://orgprints.org/30373/1/Muller-etal-AgHumVal-2016.pdf |
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| Skinner, Colin; Krauss, Maike; Conen, Franz; Hansen, Sissel; Mayer, Jochen; Neftel, Albrecht; Mäder, Paul; Gattinger, Andreas. |
| Organic farming systems provide multiple environmental benefits. Concerning climate change they have a substantial mitigation potential. Skinner et al. (2014) evaluated with Meta-Analysis the global dataset on comparative field measurements of soil greenhouse gas (GHG) fluxes under organic and non-organic agricultural management that have been published by the end of 2012. They showed that for arable land-use under organic management compared to non-organic 1) the cumulated area-scaled N2O emissions are about 15 % lower, 2) yield-scaled N2O emissions are slightly higher and 3) CH4 uptake is higher. However, this database is thin and further field measurements covering whole crop rotations are needed to close knowledge gaps. Therefore soil GHG fluxes are... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil. |
| Ano: 2015 |
URL: http://orgprints.org/26920/2/26920_skinner.pdf |
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| Skinner, Colin; Gattinger, Andreas; Müller, Adrian; Mäder, Paul; Fließbach, Andreas; Stolze, Matthias; Ruser, Reiner; Niggli, Urs. |
| It is anticipated that organic farming systems provide benefits concerning soil conservation and climate protection. A literature search on measured soil-derived greenhouse gas (GHG) (nitrous oxide and methane) fluxes under organic and non-organic management from farming system comparisons was conducted and followed by a meta-analysis. Up to date only 19 studies based on field measurements could be retrieved. Based on 12 studies that cover annual measurements, it appeared with a high significance that area-scaled nitrous oxide emissions from organically managed soils are 492 ± 160 kg CO2 eq. ha− 1 a− 1 lower than from non-organically managed soils. For arable soils the difference amounts to 497 ± 162 kg CO2 eq. ha− 1 a− 1. However, yield-scaled nitrous... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Air and water emissions. |
| Ano: 2014 |
URL: http://orgprints.org/24506/1/Skinner-etal-2014-SciTotalEnviron-468-469-p553-563.pdf |
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| Gattinger, Andreas; Skinner, Colin; Müller, Adrian; Fließbach, Andreas; Mäder, Paul; Häni, Matthias; Buchmann, Nina; Stolze, Matthias; Niggli, Urs. |
| Explorative literature searches followed by meta-analyses were conducted to identify differences in soil organic carbon (SOC) and soil-derived greenhouse gas emissions between organic and non-organic farming systems. Within a total of 74 studies we found significantly higher SOC concentrations, SOC stocks and C sequestration rates in organically managed soils compared to those under non-organic management. Meta-analysis of soil-derived GHG flux data from 19 studies revealed lower N2O emissions and higher CH4 uptake rates in soils under organic management when related to acreage. Due to lower yields in organic farming systems higher GHG emissions from these systems were obtained when the data was related to unit crop yield. The poor availability of farming... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Air and water emissions. |
| Ano: 2013 |
URL: http://orgprints.org/21581/1/21581_gattinger.pdf |
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| Necpalowa, Magdalena; Lee, Juhwan; Skinner, Colin; Büchi, Lucie; Wittwer, Raphaël; Gattinger, Andreas; van der Heijden, Marcel; Mäder, Paul; Charles, Raphaël; Berner, Alfred; Mayer, Jochen; Six, Johan. |
| There is an urgent need to identify and evaluate management practices for their biophysical potential to maintain productivity under climate change while mitigating greenhouse gas (GHG) emissions from individual cropping systems under specific pedo-climatic conditions. Here, we examined, through DayCent modeling, the long-term impact of soil management practices and their interactions on soil GHG emissions and GHG intensity from Swiss cropping systems. Based on experimental data from four long-term experimental sites in Switzerland (Therwil, Frick, Changins, and Reckenholz), we robustly parameterized and evaluated the model for simulating crop productivity, soil C dynamics and soil N2O emissions across a range of management practices and pedo-climatic... |
| Tipo: Journal paper |
Palavras-chave: Air and water emissions; Switzerland. |
| Ano: 2018 |
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| Skinner, Colin; Gattinger, Andreas; Müller, Adrian; Fliessbach, Andreas; Mäder, Paul; Stolze, Matthias; Niggli, Urs. |
| Biologische Landwirtschaft fördert Bodenerhalt wie –Fruchtbarkeit und mindert bodenbürtige Treibhausgas- (THG)-Emissionen. Der globale Datensatz publizierter Messungen von THG-Flüssen, Lachgas (N2O) und Methan (CH4), in Böden unter biologischer (bio) und konventioneller Bewirtschaftung (kon) landwirtschaftlicher Systemvergleichen wurde mit Meta-Analyse und Meta-Regression untersucht. Ende 2012 waren 19 Studien, auf der nördlichen Hemisphäre in gemässigten Klimata realisiert, publiziert. 13 basieren auf Jahresmessungen. Daraus resultieren, mit generell p<0.001, für Acker- und Grasland zusammen 486±191 kg CO2-eq. (1.04±0.41 kg N2O-N) ha-1 a-1 niedrigere N2O Emissionen unter bio. Für Ackerland sind die N2O Emissionen unter bio 472±195 kg CO2-eq. ha-1 a-1... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions; Soil. |
| Ano: 2013 |
URL: http://orgprints.org/25765/1/Skinner_et_al_DBG_2013.pptx |
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| Gattinger, Andreas; Müller, Adrian; Haeni, Matthias; Skinner, Colin; Fließbach, Andreas; Buchmann, Nina; Mäder, Paul; Stolze, Matthias; Smith, Pete; El-Hage Scialabbad, Nadja; Niggli, Urs. |
| In their letter, Leifeld et al. (1) argue that our metaanalysis to identify differences in soil organic carbon (SOC) between organic (OF) and nonorganic farming [conventional farming (CF)] (2) selected CF systems that were nonrepresentative. This was not the case. We included data from all available pairwise field comparisons between OF and CF identified in the literature. The observed difference in external carbon (C) inputs between OF and CF did not result from a bias in the selection of studies/treatments but was attributable to the fact that the field comparisons we analyzed (2) were not from fertilization experiments but from pairwise farming system comparisons where the design and the underlying treatments reflected the current farming practices in... |
| Tipo: Journal paper |
Palavras-chave: Air and water emissions. |
| Ano: 2013 |
URL: http://orgprints.org/25614/1/PNAS-2013-Gattinger-E985.pdf |
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| Skinner, Colin; Buol, Amanda; Gattinger, Andreas; Fliessbach, Andreas; Mäder, Paul. |
| Soil management induces nitrous oxide (N2O) and methane (CH4) emissions that account for around 40% of agriculture's direct greenhouse gas (GHG) emissions globally. Nitrous oxide is formed in the soil through a multitude of aerobic and anaerobic microbial processes with broadly varying shares and rates depending on atmospheric and site-specific conditions. Generally, N2O fluxes show a high spatial and temporal variability. A robust finding is that lower nitrogen application rates are associated with lower nitrous oxide emissions. Organic farming systems provide multiple environmental benefits; they foster inter alia agriculture’s mitigation potential concerning climate change. Skinner et al. (2014) evaluated with Meta-Analysis the available global dataset... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions; Soil. |
| Ano: 2014 |
URL: http://orgprints.org/25754/1/Poster-BGS-Changings-improved-fin.pdf |
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| Registros recuperados: 13 | |
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