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Unknowns about N-(C-) cycling in agroecosystems

Butterbach-Bahl, Klaus (2022) Unknowns about N-(C-) cycling in agroecosystems. Speech at: Studies of agroecology in long-term organic and conventional cropping systems, Aarhus University, Research Center Foulum,Tjele, Denmark, 7-8 June 2022. [Completed]

[thumbnail of Butterbach-Bahl_Agro-Ecology Workshop Foulum June 2022.pdf] PDF - English
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Summary

At all scales, ecosystem N cycling and fate of added N not well constrained
The denitrification challenge (where? When? Magnitude? Product ratios? Plant effects?)
Not getting denitrification right hampers
understanding of environmental N losses, incl. N2O fluxes
Understanding of soil C:N dynamics (ΔN, ΔC:N)
Development and testing of biogeochemical models
Development of strategies to increase NUE
…..
Various approaches for quantifying denitrification  none of those are “cheap”
Only few sites estimated total N budgets (incl. N flow components)
Long-term trials (!) needed and may include establishment of detailed N balances


EPrint Type:Conference paper, poster, etc.
Type of presentation:Speech
Agrovoc keywords:
Language
Value
URI
English
agroecosystems
http://aims.fao.org/aos/agrovoc/c_36669
English
nitrogen cycle
http://aims.fao.org/aos/agrovoc/c_27938
English
nitrogen balance
http://aims.fao.org/aos/agrovoc/c_eb390701
Subjects: Crop husbandry > Crop combinations and interactions
Knowledge management > Research methodology and philosophy > Systems research and participatory research
Research affiliation: Denmark > AU - Aarhus University > Faculty of Science and Technology > Department of Agroecology
International Conferences > 2022: Studies of agroecology in long-term organic and conventional cropping systems
Deposited By: Christensen, Jytte
ID Code:44214
Deposited On:28 Jun 2022 08:02
Last Modified:28 Jun 2022 08:02
Document Language:English
Status:Unpublished
Refereed:Not peer-reviewed
Additional Publishing Information:An international scientific workshop to celebrate the 25 years anniversary of the long-term experiment on organic arable crop rotations

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