Root litter decomposition slows with soil depth

Root litter decomposition slows with soil depth

Even though over half of the world's soil organic carbon (SOC) is stored in subsoils (>20 cm deep), and the old ages of subsoil OC indicate its cycling differs from surface SOC, there are few studies examining in situ decomposition processes in deep soils. Here, we added 13C-labeled fine roo...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Soil biology & biochemistry 2018-10, Vol.125 (C), p.103-114
Hauptverfasser: Hicks Pries, Caitlin E., Sulman, Benjamin N., West, Corinna, O'Neill, Caitlin, Poppleton, Erik, Porras, Rachel C., Castanha, Cristina, Zhu, Biao, Wiedemeier, Daniel B., Torn, Margaret S.
Format: Artikel
Sprache:eng
Schlagworte:
13C
BASIC BIOLOGICAL SCIENCES
Carbon
Decomposition
Density fractionation
Fine root
PLFA
Soil depth
Soil organic matter
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Even though over half of the world's soil organic carbon (SOC) is stored in subsoils (>20 cm deep), and the old ages of subsoil OC indicate its cycling differs from surface SOC, there are few studies examining in situ decomposition processes in deep soils. Here, we added 13C-labeled fine roots to 15, 55, and 95 cm depths of a well-characterized coniferous forest Alfisol and monitored the amount of root-derived C remaining over 6, 12, and 30 months. We recovered the root-derived C in microbial phospholipid fatty acids (PLFAs) after 6 months and in coarse (>2 mm) particulate, fine (
ISSN:0038-0717
1879-3428
DOI:10.1016/j.soilbio.2018.07.002