Dr. Christina-Luise Roß erforscht, wie Böden durch organische Reststoffe — insbesondere Gärreste aus Biogas- und Kompostanlagen — verbessert werden können, um Pflanzen widerstandsfähiger gegen Trockenheit und Klimawandel zu machen. Ihr aktueller Fokus liegt auf der Entwicklung trockentoleranter Anbausysteme für Kichererbsen und Roggen unter Bedingungen wie in Ostdeutschland. Sie untersucht dabei systematisch, wie unterschiedliche organische Dünger die biologischen Bodeneigenschaften (Mikroorganismen, Regenwürmer, Nematoden), die Kohlenstoffspeicherung und letztlich die Ernteerträge beeinflussen. Für Landwirtschaftsbetriebe, Biogas- und Kompostanlagen sowie die öffentliche Hand bietet dies konkrete Lösungen: Wie lassen sich Abfallprodukte sinnvoll in den Boden zurückführen, um gleichzeitig Humus aufzubauen, CO₂ zu binden und die Widerstandskraft gegen Dürren zu erhöhen? Ihre Langzeitfeldversuche liefern dafür empirische Grundlagen.
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Dr. Christina-Luise Roß
HU-FIS-Profil ↗Förderer: Bundesministerium für Landwirtschaft, Ernährung und Heimat Zeitraum: 09/2024 - 08/2027 Projektleitung: Dr. Christina-Luise Roß
Soil Biology and Biochemistry · DOI
Archives of Agronomy and Soil Science · DOI
AbstractFrom hydro-/biochar application to soils positive effects on soil characteristics and as a consequence on yield of crops were expected. The objective of this study was to compare the effects of maize biochar and maize hydrochar (HTC-char) amendments treated with or without digestate, as well as a wood biochar, mixed with or without digestate and mineral nitrogen fertilizer on yield, yield components, nutrient contents and quality of spring wheat. Therefore, a pot experiment was set up. Yield, yield components and quality were mainly influenced by nitrogen fertilizer. The application of HTC-char could have negative effects on yield and yield components of spring wheat. Hydrochar treated with digestate had no negative effects on yield of spring wheat.Keywords: hydrocharbiocharnitrogen fertilizationcrude protein content AcknowledgementsThe authors acknowledge the Leibniz-Gemeinschaft within the context of the Joint Initiative for Research and Innovation (SAW) for founding. Soil was provided for this study from a field managed by IASP (Institute of Agricultural and Urban Ecological Projects affiliated to Humboldt-University of Berlin), Berge, Brandenburg, Germany.
Archives of Agronomy and Soil Science · DOI
During the past years, most biochar studies were carried out on tropical soils whereas perennial field experiments on temperate soils are rare. This study presents a 3-year field experiment regarding the effects of differently produced biochars (pyrolyzed wood, pyrolyzed maize silage, hydrothermal carbonized maize silage) in interaction with digestate incorporation and mineral N fertilizer application on soil C and N, crop yields of winter wheat, winter rye and maize and the quality of winter wheat. Soil C and plant available potassium were found to be significantly positive affected by pyrolyzed wood biochar whereas the latter only in combination with N fertilization. Crop yields of winter wheat, winter rye and maize were not affected by biochar and showed no interaction effects with N fertilizer supply. Wheat grain quality and nutrition contents were significantly affected by biochar application, for example, highest amounts of phosphorus, potassium and magnesium were determined in treatments amended with pyrolyzed maize silage biochar. Biochar induced an improved availability of plant nutrients, which apparently were not yield limiting in our case. These results limit the potentials of biochar for sustainable intensification in agriculture by increasing crop yields for the temperate zones. However, detection of other environmental benefits requires further investigations.