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| Titel |
Soil-plant-biochar interactions and effects on soil C and N cycling in a wheat greenhouse pot experiment. |
| VerfasserIn |
E. Michie, P. Panzacchi, C. A. Davies, S. Toet, P. Ineson |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250068011
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| Zusammenfassung |
| Biochar is carbon rich material, able to modify soil qualities and increase soil carbon
sequestration. We investigated the benefits, interactions and mechanisms observed when
adding biochar (from Miscanthus feedstock) to soil. In a greenhouse experiment with wheat
grown in pots under simulated natural conditions, biochars pyrolysed at 360Ë C and 450Ë C
were applied at 10, 25, and 50 tha-1, with or without nitrogen (urea). These pots were
subjected to different water regimes (400 and 800 mm per year) according to a
randomised block design. Growth rate, grain yield and total biomass will be related to the
biochar production temperature and application rate. The effect of biochar on water
availability and C and N cycling will be tested by direct measurements of CO2,
CH4 and N2O fluxes from soil using closed dynamic and static chamber methods.
Different natural 13C abundance in biochar (Δ13C--13) and soil organic matter
(SOM; (Δ13C --27) will be used to calculate the relative contribution of biochar
to total soil respiration and the potential priming effect of the biochar on SOM.
In addition a labelling experiment with 13CO2 will be used to trace C from the
atmosphere through the plant, revealing how biochar affects C allocation in plant
biomass, rhizodeposition and root respiration. Preliminary results will be presented. |
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