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Registros recuperados: 11
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Response of methanogenic archaea to Late Pleistocene and Holocene climate changes in the Siberian Arctic Organic Eprints
Bischoff, Juliane; Mangelsdorf, Kai; Gattinger, Andreas; Schloter, Michael; Kurchatova, Anna; Herzschuh, Ulrike; Wagner, Dirk.
In order to investigate the link between the methane dynamics in permafrost deposits and climate changes in the past, we studied the abundance,composition and methane production of methanogenic communities in Late Pleistocene and Holocene sediments of the Siberian Arctic. We detected intervals of increased methane concentrations in Late Pleistocene and Holocene deposits along a 42 ka old permafrost sequence from Kurungnakh Island in the Lena Delta (northeast Siberia). Increased amounts of archaeal life markers (intact phospholipid ethers) and a high variety in genetic fingerprints detected by 16S ribosomal ribonucleic acid (rRNA) gene analyses of methanogenic archaea suggest presently living and presumably active methanogenic archaea in distinct layers...
Tipo: Journal paper Palavras-chave: Air and water emissions.
Ano: 2013 URL: http://orgprints.org/22247/1/Bischoff-et-al-GBC-2013.pdf
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A long-term field experiment demonstrates the influence of tillage on the bacterial potential to produce soil structure-stabilizing agents such as exopolysaccharides and lipopolysaccharides Organic Eprints
Cania, Barbara; Vestergaard, Gisle; Krauss, Maike; Fliessbach, Andreas; Schloter, Michael; Schulz, Stefanie.
Background: Stable soil aggregates are essential for optimal crop growth and preventing soil erosion. However, tillage is often used in agriculture to loosen the soil, which disrupts the integrity of these aggregates. Soil aggregation can be enhanced by bacteria through their ability to produce exopolysaccharides and lipopolysaccharides. These compounds stabilize soil aggregates by “gluing” soil particles together. However, it has yet to be shown how tillage influences the bacterial potential to produce aggregate-stabilizing agents. Therefore, we sampled conventional and reduced tillage treatments at 0–10 cm, 10–20 cm and 20–50 cm from a long-term field trial in Frick, Switzerland. We compared the stable aggregate fraction of the soil and the bacterial...
Tipo: Journal paper Palavras-chave: Soil quality; Soil biology; Biodiversity and ecosystem services.
Ano: 2019 URL: http://orgprints.org/35214/1/Cania_EnvMic_2019.pdf
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Estimation by PLFA of Microbial Community Structure Associated with the Rhizosphere of Lygeum spartum and Piptatherum miliaceum Growing in Semiarid Mine Tailings Organic Eprints
Carrasco, Lucía; Gattinger, Andreas; Fließbach, Andreas; Roldán, Antonio; Schloter, Michael; Caravaca, Fuensanta.
The objective of this study was to compare the microbial community composition and biomass associated with the rhizosphere of a perennial gramineous species (Lygeum spartum L.) with that of an annual (Piptatherum miliaceum L.), both growing in semiarid mine tailings. We also established their relationship with the contents of potentially toxic metals as well as with indicators of soil quality. The total phospholipid fatty acid (PLFA) amount was significantly higher in the rhizosphere soil of the annual species than in the rhizosphere soil of the perennial species. The fungal/bacterial PLFA ratio was significantly greater in the perennial species compared to the annual species. The fatty acid 16:1ω5c, the fungal/bacterial PLFA ratio and...
Tipo: Journal paper Palavras-chave: Soil biology.
Ano: 2009 URL: http://orgprints.org/17847/1/Carrasco%2Detal%2D2010%2Dmicrob%2Decol.pdf
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Shallow non-inversion tillage in organic farming maintains crop yields and increases soil C stocks: a meta-analysis Organic Eprints
Cooper, Julia; Baranski, Marcin; Stewart, Gavin; Nobel-de Lange, Majimcha; Barberi, Paolo; Fliessbach, Andreas; Peigne, Joséphine; Berner, Alfred; Brock, Christopher; Casagrande, Marion; Crowley, Oliver; David, Christophe; De Vliegher, Alex; Döring, Thomas F.; Dupont, Aurélien; Entz, Martin; Grosse, Meike; Haase, Thorsten; Halde, Caroline; Hammerl, Verena; Huiting, Hilfred; Leithold, Günter; Messmer, Monika; Schloter, Michael; Sukkel, Wijnand; van der Heijden, Marcel G. A.; Willekens, Koen; Wittwer, Raphaël; Mäder, Paul.
Reduced tillage is increasingly promoted to improve sustainability and productivity of agricultural systems. Nonetheless, adoption of reduced tillage by organic farmers has been slow due to concerns about nutrient supply, soil structure, and weeds that may limit yields. Here, we compiled the results from both published and unpublished research comparing deep or shallow inversion tillage, with various categories of reduced tillage under organic management. Shallow refers to less than 25 cm. We found that (1) division of reduced tillage practices into different classes with varying degrees of intensity allowed us to assess the trade-offs between reductions in tillage intensity, crop yields, weed incidence, and soil C stocks. (2) Reducing tillage intensity in...
Tipo: Journal paper Palavras-chave: Soil quality; Soil tillage.
Ano: 2016 URL: http://orgprints.org/29974/1/Cooper-etal-2016-ASD-36_22.pdf
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Response of soil microbial biomass and community structures to conventional and organic farming systems under identical crop rotations Organic Eprints
Esperschütz, Jürgen; Gattinger, Andreas; Mäder, Paul; Schloter, Michael; Fließbach, Andreas.
In this study the influence of different farming systems on microbial community structure was analyzed using soil samples from the DOK long-term field experiment in Switzerland, which comprises organic (BIODYN and BIOORG) and conventional (CONFYM and CONMIN) farming systems as well as an unfertilized control (NOFERT). We examined microbial communities in winter wheat plots at two different points in the crop rotation (after potatoes and after maize). Employing extended polar lipid analysis up to 244 different phospholipid fatty acids (PLFA) and phospholipid ether lipids (PLEL) were detected. Higher concentrations of PLFA and PLEL in BIODYN and BIOORG indicated a significant influence of organic agriculture on microbial biomass. Farmyard manure (FYM)...
Tipo: Journal paper Palavras-chave: Nutrient turnover; "Organics" in general; Soil quality.
Ano: 2007 URL: http://orgprints.org/13315/1/Esperschuetz-FEMSME-2007.pdf
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Strukturelle und funktionelle Charakterisierung von mikrobiellen Gemeinschaften in ökologisch und konventionell bewirtschafteten Ackerböden Organic Eprints
Esperschütz, Jürgen; Gattinger, Andreas; Schloter, Michael; Fließbach, Andreas.
Strukturelle und funktionelle Charakterisierung von mikrobiellen Gemeinschaften in ökologisch und konventionell bewirtschafteten Ackerböden.
Tipo: Conference paper, poster, etc. Palavras-chave: Soil biology; Soil quality.
Ano: 2005 URL: http://orgprints.org/9090/1/fliessbach%2Detal%2D2005%2DBeitrag_8_Wissenschaftsstagung.pdf
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Soil microbial community structure and organic matter transformation processes in organic and integrated farming systems Organic Eprints
Fliessbach, Andreas; Dubois, David; Esperschütz, Jürgen; Gunst, Lucie; Mäder, Paul; Oberholzer, Hansruedi; Schloter, Michael; Gattinger, Andreas.
The DOK long-term field trial in Switzerland started in 1978 (Mäder et al., 2002). Biodynamic (BIODYN), bioorganic (BIOORG) and integrated (CONFYM) farming systems with manure fertilization, an integrated system based on mineral fertilizer only (CONMIN) and an unfertilized control (NOFERT) were investigated for changes in soil organic matter and on the structure of the soil microbial communities. Soil organic matter (SOM) in the Ap-horizon (0-20 cm) was analysed from the beginning of the DOK field trial in 1978. Roughly 20% of the initial SOM was lost when no manure was applied for 21 years as in the CONMIN and the NOFERT system, whereas SOM increased slightly by 4% in the BIODYN system that makes use of composted farmyard manure, corresponding to 1.4...
Tipo: Conference paper, poster, etc. Palavras-chave: Soil quality.
Ano: 2005 URL: http://orgprints.org/4342/4/Fliessbach_etal_4p_revised%2Ded.doc
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Soil quality changes in field trials comparing organic reduced tillage to plough systems across Europe (TILMAN-ORG Session) Organic Eprints
Fliessbach, Andreas; Hammerl, Verena; Antichi, Daniele; Barberi, Paolo; Berner, Alfred; Bufe, Cornelia; Delfosse, Philippe; Gattinger, Andreas; Grosse, Meike; Haase, Thorsten; Heß, Jürgen; Hissler, Christophe; Koal, Phillip; Kranzler, Andreas; Krauss, Maike; Mäder, Paul; Peigné, Joséphine; Pritsch, Karin; Reintam, Endla; Surböck, Andreas; Vian, Jean François; Schloter, Michael.
Field trials on reduced soil tillage under organic farming conditions across Europe were used to compare the soil quality changes over time. Soil organic carbon fractions, soil carbon stocks and microbial community structure were analysed. Most severe differences between plough and reduced tillage were found in the top ten cm of the soil profile. Differences became less or not significant in deeper layers. Analyses are still ongoing and will only be ready to be presented at the conference.
Tipo: Conference paper, poster, etc. Palavras-chave: Soil quality; Crop combinations and interactions; Soil biology; Soil tillage; Air and water emissions.
Ano: 2014 URL: http://orgprints.org/24293/1/24293%20TILMAN%20Fliessbach_revised_MM.pdf
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Einflüsse der Rhizodeposition von Körnerleguminosen auf den Umsatz ihrer Residuen im Boden Organic Eprints
Mayer, Jochen; Buegger, Franz; Jensen, Erik Steen; Schloter, Michael; Heß, Jürgen.
Fazit: Die Ergebnisse bestätigen die Bedeutung des NdfR* als ein wesentlicher Faktor für die N-Dynamik nach Körnerleguminosen. Der NdfR wird hauptsächlich als mikrobielle Residualmasse im Boden immobilisiert und bildet damit einen labilen Pool der organischen Bodensubstanz. Die Rhizodeposition von Körnerleguminosen beeinflusst, vermutlich über Interaktionen mit den Bodenmikroorganismen, den anschließenden Umsatz ihrer Residuen. Das Ausmaß dieser Wirkungen ist pflanzenartspezifisch und wahrscheinlich durch die Menge und Zusammensetzung der Rhizodeposition bestimmt. Zur Optimierung ökologischer Pflanzenbausysteme muss das Verständnis dieser Prozesse weiter vertieft werden. * Nach der Ernte der oberirdischen Pflanzenteile zur Reife der Pflanzen wurden...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover Cereals; Pulses and oilseeds Soil biology.
Ano: 2003 URL: http://orgprints.org/932/1/mayer%2D2003%2Drhizodeposition%2Dkoernerleguminosen.pdf
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Initial soil formation in an agriculturally reclaimed open-cast mining area - the role of management and loess parent material Organic Eprints
Pihlap, Evelin; Vuko, Miljenka; Lucas, Maik; Steffens, Markus; Schloter, Michael; Vetterlein, Doris; Endenich, Manuel; Kögel-Knabner, Ingrid.
After reclamation of open-cast mining pits, soil formation starts from the deposited calcareous loess characterised by its basic physical and chemical properties whereas soil biology and structure need to develop to achieve a fully functional soil. In this study we used a chronosequence approach to elucidate soil formation on agriculturally reclaimed loess soils in an open-cast lignite mining area in Garzweiler (Germany). We selected six fields aged 0, 1, 3, 6, 12, and 24 years after the first seeding in order to observe the initial stage of development of soil properties and assess the role of management with conventional crop rotation in soil structure formation and soil organic carbon (SOC) accumulation. Loess parent material had a strong impact on...
Tipo: Journal paper Palavras-chave: Soil quality; Nutrient turnover.
Ano: 2019 URL: http://orgprints.org/35361/1/pihlap_etal_2019_soil_tillage-research-Vol191-p224-237.pdf
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Einfluss von Bewirtschaftungsmaßnahmen auf die Struktur und Funktion der Bodenmikroflora Organic Eprints
Schloter, Michael; Cania, Barbara; Schulz, Stefanie.
Im ökologischen Landbau gilt es unter umweltschonender Bewirtschaftung trotzdem hohe Erträge zu erzielen. Bisher wurde dies durch konventionelle Pflügung realisiert, diese Maßnahme zerstört aber die Bodenstruktur und damit den Lebensraum wichtiger Organismengruppen. Daher ist es wünschenswert die im konventionellen Landbau schon übliche reduzierte Bodenbearbeitung auch im ökologischen Landbau zu etablieren. Im Rahmen dieses Projektes wurde daher untersucht wie sich die reduzierte Bodenbearbeitung auf das Mikrobiom auswirkt. Da Pflügen insbesondere die Bodenstruktur zerstört, lag der besondere Fokus auf dem bakteriellen Potential strukturbildende Substanzen wie Exo-(EPS) und Lipopolysaccharide (LPS) zu produzieren. Dazu wurden vier Standorte mit...
Tipo: Report Palavras-chave: Soil quality; Soil tillage.
Ano: 2018 URL: http://orgprints.org/34142/1/34142-11OE001-helmholtz-zentrum-gmbh-schloter-2018-bodenmikroflora.pdf
Registros recuperados: 11
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