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Título

Immobilisation of 15N derived from 15N-enriched black nitrogen into soil organic matter

AutorLópez Martín, María ; Rosa Arranz, José M. de la ; Knicker, Heike
Palabras claveincubation
NMR spectroscopy
vegetation fires
N stabilization
charcoal
15N
Fecha de publicación1-sep-2014
EditorUniversity of Ioannina
CitaciónThe 17th Meeting of the International Humic Substances Society . Natural Organic Matter: Structure-Dynamics-Innovative applications., Ioannina, Greece September 1-5 2014
ResumenA medium-term pot experiment of 16 months was designed to study the incorporation of 15N from burnt and unburnt plant residues into the stable soil organic matter fraction. Our results show that after 2 weeks all soils were enriched in 15N, indicating that Black Nitrogen (BN) was relatively quickly incorporated into the soil. Although 15N from the mineral fertilizer was identified in the soil at the beginning of the experiment, our study indicated that it was not efficiently immobilized over a longer time frame. In contrast 15N from the added pyrogenic organic matter (PyOM) remained incorporated into the humic material until the end of the experiment. Preliminary 15N NMR studies confirmed that some of the heteroaromatic N from BN was transformed into amide N most likely of microbial origin. Our results confirmed that BN is less biochemically recalcitrant than commonly assumed. Therefore N-rich PyOM may act as slow-release N source for the growing plant.
Descripción2 p.-- 1 figura.-- 6 referencias.-- Comunicación presentada en el The 17th Meeting of the International Humic Substances Society . Natural Organic Matter: Structure-Dynamics-Innovative applications., Ioannina, Greece September 1-5 2014
Versión del editorhttp://ihss2014.org/
URIhttp://hdl.handle.net/10261/120940
Aparece en las colecciones: (IRNAS) Comunicaciones congresos
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