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| Hijri, Isabelle; Sýkorová, Zuzana; Oehl, Fritz; Ineichen, Kurt; Mäder, Paul; Wiemken, Andres; Redecker, Dirk. |
| Communities of arbuscular mycorrhizal fungi (AMF) in five agricultural field sites of different management intensities were studied. Variable regions of the ribosomal RNA genes were used to detect and identify AMF directly within colonized roots. Roots from a continuous maize monoculture showed low AMF diversity, in agreement with previous reports on molecular diversity of AMF in agricultural soils. In contrast, a substantially higher diversity of AMF was found throughout the long term `DOK' field experiment, where organic and conventional agricultural practices have been compared side by side since 1978. In this experiment, a 7-year crop rotation is performed under lower levels of inorganic fertilizer input and chemical pest control. These results are in... |
| Tipo: Journal paper |
Palavras-chave: Soil biology; Soil quality. |
| Ano: 2007 |
URL: http://orgprints.org/13462/1/hijri%2Detal%2D2006%2Dmolecular_ecology%2Dvol15%2D2277%2D89.pdf |
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| Oehl, Fritz; Sieverding, Ewald; Ineichen, Kurt; Mäder, Paul; Boller, Thomas; Wiemken, Andres. |
| The impact of land use intensity on the diversity of arbuscular mycorrhizal fungi (AMF) was investigated at eight sites in the “three-country corner” of France, Germany, and Switzerland. Three sites were low-input, species-rich grasslands. Two sites represented low- to moderate-input farming with a 7-year crop rotation, and three sites represented high-input continuous maize monocropping. Representative soil samples were taken, and the AMF spores present were morphologically identified and counted. The same soil samples also served as inocula for “AMF trap cultures” with Plantago lanceolata, Trifolium pratense, and Lolium perenne. These trap cultures were established in pots in a greenhouse, and AMF root colonization and spore formation were monitored over... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2003 |
URL: http://orgprints.org/26750/1/Oehl_et_al_2003_AEM.pdf |
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| Säle, Verena; Aguilera, Paula; Laczko, Endre; Mäder, Paul; Berner, Alfred; Zihlmann, Urs; van der Heijden, Marcel G.A.; Oehl, Fritz. |
| Communities of arbuscular mycorrhizal fungi (AMF) are strongly affected by land use intensity and soil type. The impact of tillage practices on AMF communities is still poorly understood, especially in organic farming systems. Our objective was to investigate the impact of soil cultivation on AMF communities in organically managed clay soils of a long-term field experiment located in the Sissle valley (Frick, Switzerland) where two different tillage (reduced and conventional mouldboard plough tillage) and two different types of fertilization (farmyard manure & slurry, or slurry only) have been applied since 2002. In addition, a permanent grassland and two conventionally managed croplands situated in the neighborhood of the experiment were analyzed as... |
| Tipo: Journal paper |
Palavras-chave: Soil tillage; Soil. |
| Ano: 2015 |
URL: http://orgprints.org/30696/1/saele-etal-2015-SoilBiolBiochemistry-Vol84-p38-52.pdf |
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| Oehl, Fritz; Sieverding, Ewald; Ineichen, Kurt; Mäder, Paul; Wiemken, Andres; Boller, Thomas. |
| The aim of this study was to investigate sporulation dynamics of arbuscular mycorrhizal fungal (AMF) communities from agroecosystems differing in land use intensity in long-term experimental microcosms. These were set up with characteristic grassland plants (Lolium perenne, Trifolium pratense, Plantago lanceolata), and inoculated with soils from several grasslands and arable lands subjected to crop rotation or continuous monocropping. The microcosms were maintained under ambient light and temperature conditions over 3 years. A novel, localized sampling scheme was applied for attaining exclusively the newly formed spores at bimonthly intervals. Overall, 39 AMF species were detected by morphological spore identification. Some species were recovered from all... |
| Tipo: Journal paper |
Palavras-chave: Soil. |
| Ano: 2009 |
URL: http://orgprints.org/26382/1/Oehl_etal_2009_AEE134.pdf |
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| Zihlmann, Urs; Tschachtli, Ruedi; Oberholzer, Hans-Rudolf; van der Heijden, Marcel; Oehl, Fritz. |
| The effect of integrated and organic farming on crop yield as well as on environmental and economic performance was investigated in a large scale field experiment near Lucerne (Switzerland), which was running for 18 years. Crop yield in organically managed fields was, depending on crop species, between 3% and 36% lower compared to conventionally managed fields. Only slight variations in crop quality were observed between the farming systems, probably as a result of the high nitrogen mineralization potential of the soils in this experiment. Our results show that organic farming on fertile soils provides good yields and is – under the given Swiss agricultural policy – economically beneficial. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop husbandry. |
| Ano: 2011 |
URL: http://orgprints.org/17594/3/Oehl_17594.pdf |
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