Consulta: creatorFacets:"Kelm, Michael"
Registros recuperados: 4
Data/hora: 10/06/2024 15:18:47

N-Auswaschung unter ökologisch und konventionell bewirtschafteten Praxisflächen in Norddeutschland – Ergebnisse aus dem Projekt COMPASS
Provedor de dados: 21
Autores: Kelm, Michael; Loges, Ralf; Taube, Friedhelm.
Nitrogen (N) leaching, especially in the form of nitrate (NO3-), still represents a major environmental impact from agriculture. In order to estimate potential N leaching losses under conditions on commercial farms in Northern Germany, N leaching was analyzed by using ceramic suction cups on representative fields on eight organic and conventional farms. On dairy farms, permanent grassland and maize for silage were analyzed as the main fodder crops. On arable farms, one crop with a high risk and one with a low risk of N leaching losses were selected. On permanent grassland, N leaching was pronouncedly lower on organic farms. If grass/clover on organic farms was ploughed, high amounts of N were leached in the following winter, irrespective if grass/clover...
Tipo: Conference paper, poster, etc.
Palavras-chave: Air and water emissions.
Ano: 2007
URL: http://orgprints.org/11005/1/256_9765_Kelm_N%2DAuswaschung.pdf

Nitrate leaching and energy efficiency of stockless arable systems compared with mixed farming and a non-organic system on fertile soils in Northern Germany
Provedor de dados: 21
Autores: Loges, Ralf; Kelm, Michael; Taube, Friedhelm.
Previous studies based on either small-scale plot experiments or modelling approaches, indicate a lower risk of nitrate leaching and a higher energy efficiency in organic than in conventional farming systems. Because there is still a lack of data measured at the farm scale, which also take farm type and farming practices into account, a comparison between an N-intensive non-organic, two organic all-arable crop rotations and a typical rotation of a mixed organic farm was carried out over a three-year period at a highly productive site in Northern Germany. Comparing the all-arable crop rotations, the organic systems had 70% lower potential yields than the regional typical conventional crop rotation. In spite of 60% lower input of fossil energy an N-intensive...
Tipo: Conference paper, poster, etc.
Palavras-chave: Air and water emissions.
Ano: 2008
URL: http://orgprints.org/12256/1/Loges_12256_ed.doc

10 Jahre Forschungsschwerpunkt Ökologischer Landbau und extensive Landnutzungssysteme
Provedor de dados: 21
Autores: Kelm, Michael; Neumann, Helge.
Der vorliegende Band gibt einen kompakten Überblick über die Forschungsaktivitäten der vergangenen 10 Jahre im Forschungsschwerpunkt "Ökologischer Landbau und extensive Landnutzungssysteme" der Universität Kiel.
Tipo: Book
Palavras-chave: "Organics" in general.
Ano: 2007
URL: http://orgprints.org/11003/1/10_Jahre_FSP_%C3%96kolandbau.pdf

Wissen, wo man steht. Ergebnisse des Projektes "COMPASS".
Provedor de dados: 21
Autores: Kelm, Michael; Taube, Friedhelm; Hüwing, Hinrich; Kemper, Nicole; Neumann, Helge.
Das Projekt "COMPASS" der Agrar- und Ernährungswissenschaftlichen Fakultät der Universität Kiel beschäftigt sich seit 2004 mit dem Monitoring von Leistungen und ökologischen Effekten auf 32 konventionellen und ökologischen Praxisbetrieben. Im vorliegenden Band sind die zentralen Ergebnisse aus den Bereichen Nährstoffmanagement, Pflanzenschutz, Rückstandsproblematik, Tiergesundheit und Biodiversität (EU-Projekt AVI-LAND) umfassend und gleichzeitig anschaulich dargestellt.
Tipo: Book
Palavras-chave: Biodiversity and ecosystem services; Health and welfare; Air and water emissions.
Ano: 2007
URL: http://orgprints.org/11002/1/CAU_Kiel_Broschuere_COMPASS.pdf