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Carbon Source Utilization by Microbial Communities in Soils under Organic and Conventional Farming Practice Organic Eprints
Fliessbach, Dr. Andreas; Mäder, Dr. Paul.
In a long-term field trial in which organic and conventional agricultural systems were compared since 1978 we analyzed soil microbial biomass, microbial activity and substrate utilization patterns by the Biolog GN microplates. Microbial biomass and the Cmic -to-Corg ratio was distinctly higher in organic plots whilst the metabolic quotient qCO2 as an indicator of the energy requirement of soil microorganisms was lower. Substrate utilization profiles were affected by the different lon-term treatments, but also indicated differences of short-term effects like crop and soil management steps.
Tipo: Book chapter Palavras-chave: Farming Systems; Soil biology; Biodiversity and ecosystem services.
Ano: 1997 URL: http://orgprints.org/305/1/Submeco_1997.pdf
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Bodenfruchtbarkeit und biologische Vielfalt im ökologischen Landbau Organic Eprints
Mäder, Dr. Paul; Fliessbach, Dr. Andreas; Dubois, Dr. David; Gunst, Lucie; Fried, Dr. Padruot; Niggli, Dr. Urs.
Um die Effektivität landwirtschaftlicher Anbausysteme zu beurteilen, bedarf es eines Verständnisses der Agrarökosysteme. Eine 21-jährige Studie ergab 20 Prozent geringere Erträge bei ökologischen Anbausystemen gegenüber konventionellen, obgleich der Einsatz von Düngemitteln und Energie um 34 bis 53 Prozent und der von Pestiziden um 97 Prozent geringer war. Wahrscheinlich führen die erhöhte Bodenfruchtbarkeit und die größere biologische Vielfalt in den ökologischen Versuchsparzellen dazu, dass diese Systeme weniger auf Zufuhr von außen angewiesen sind.
Tipo: Journal paper Palavras-chave: Farming Systems; Soil biology; Biodiversity and ecosystem services; Soil quality.
Ano: 2002 URL: http://orgprints.org/302/1/maeder%2Det%2Dal%2D2002%2Doel%2Ddok%2Dscience.pdf
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Productivity, Soil Fertility and Biodiversity in Organic Agriculture Organic Eprints
Fliessbach, Dr. Andreas; Mäder, Dr. Paul.
The DOK long-term field experiment is comparing organic and conventional farming systems since 1978. The systems mainly differ with respect to fertilization and plant protection. The crop yields of the organic systems averaged at 20% of the conventional over three seven-year crop rotation periods. Nutrient input (N, P, K) in the organic systems was 34 – 51 % lower than in the conventional systems, indicating and efficient production. Soil quality as indicated by physical, chemical and biological measures is markedly higher in the organic systems. Organic systems of the DOK trial can therefore be regarded as efficient with respect to productivity and safeguarding environmental quality and biodiversity.
Tipo: Conference paper, poster, etc. Palavras-chave: Biodiversity and ecosystem services; Soil quality; Composting and manuring.
Ano: 2006 URL: http://orgprints.org/7682/1/Fliessbach_et_al_DOK%2Dtrial.doc
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