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Charakterisierung von Bioporenwandungen mit in situ Endoskopie und chemischer Analyse: Einfluss von Regenwürmern auf Kohlenstoff- und Stickstoffgehalte

Athmann, Miriam; Fetscher, Johannes; Zemke, Daniel; Kautz, Timo and Köpke, Ulrich (2015) Charakterisierung von Bioporenwandungen mit in situ Endoskopie und chemischer Analyse: Einfluss von Regenwürmern auf Kohlenstoff- und Stickstoffgehalte. [Characterisation of biopore walls with in situ endoscopy and chemical analysis: Influence of earthworms on carbon and nitrogen contents.] Poster at: 13. Wissenschaftstagung Ökologischer Landbau, Hochschule für nachhaltige Entwicklung Eberswalde, 17. - 20. März 2015.

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Summary

Biopores have been shown to be enriched with plant available nutrients as compared to the surrounding bulk soil and therefore are considered hot spots for the nutrient acquisition especially in the otherwise nutrient-poor subsoil. As a result of colonization of biopores by earthworms, pore walls are enriched with nutrients. In this study, a first attempt was made to assess the influence of earthworm abundance on both structural pore wall characteristics as assessed with in situ endoscopy and on pore wall C and N contents. Higher earthworm density resulted in higher N contents and significantly higher C contents in biopore walls as compared to the surrounding bulk soil, regardless whether they showed visible earthworm coatings. In the treatment with lower earthworm density, only biopores with visible earthworm coatings had significantly higher N contents as compared to the surrounding bulk soil. The results of this study highlight the special role of earthworms for enriching biopores with nutrients and underline the value of biopores for the nutrient acquisition from the subsoil.

Summary translation

Biopores have been shown to be enriched with plant available nutrients as compared to the surrounding bulk soil and therefore are considered hot spots for the nutrient acquisition especially in the otherwise nutrient-poor subsoil. As a result of colonization of biopores by earthworms, pore walls are enriched with nutrients. In this study, a first attempt was made to assess the influence of earthworm abundance on both structural pore wall characteristics as assessed with in situ endoscopy and on pore wall C and N contents. Higher earthworm density resulted in higher N contents and significantly higher C contents in biopore walls as compared to the surrounding bulk soil, regardless whether they showed visible earthworm coatings. In the treatment with lower earthworm density, only biopores with visible earthworm coatings had significantly higher N contents as compared to the surrounding bulk soil. The results of this study highlight the special role of earthworms for enriching biopores with nutrients and underline the value of biopores for the nutrient acquisition from the subsoil.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:drilosphere, pore wall structure, earthworms, carbon, nitrogen, subsoil
Agrovoc keywords:
LanguageValueURI
EnglishUNSPECIFIEDUNSPECIFIED
Subjects: Soil > Soil quality
Soil > Soil quality > Soil biology
Soil
Research affiliation: Germany > University of Bonn > Institute of Organic Agriculture
International Conferences > 2015: Scientific Conference of the German Speaking Countries > Pflanze & Boden
ISBN:978-3-89574-885-1
DOI:27215
Related Links:http://www.wissenschaftstagung.de/
Deposited By: Athmann, Miriam
ID Code:27215
Deposited On:22 Jun 2015 12:36
Last Modified:13 Jan 2016 09:39
Document Language:German/Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 13. Wissenschaftstagung erschienen.
Häring, A.M., Hörning, B., Hoffmann-Bahnsen, R., Luley, H., Luthardt, V., Pape, J., Trei, G. (Hrsg.)(2015):
Am Mut hängt der Erfolg - Rückblicke und Ausblicke auf die ökologische Landbewirtschaftung.
Beiträge zur 13. Wissenschaftstagung Ökologischer Landbau, Hochschule für nachhaltige Entwicklung Eberswalde, 17.-20. März 2015
Verlag Dr. Köster, Berlin

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