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(Article of periodic en Anglais - 2014)

Document title

Carbon dynamics in topsoil and subsoil along a cultivated toposequence

Authors(s) and Affiliation(s)

CHIRINDA N. (1) ; ELSGAARD L. (2) ; THOMSEN I.K. (2) ; HECKRATH G. (2) ; OLESEN J.E. (2) ;
(1) Centro Internacional de Agricultura Tropical (CIAT), Cali, COLOMBIE
(2) Dept. of Agroecology, Univ., Aarhus, DANEMARK

Abstract

This study aimed to investigate soil organic carbon (SOC) dynamics in topsoil (5 cm) and subsoil horizons (40 and 80 cm) at shoulderslope and footslope positions in a toposequence in a Danish winter wheat field. In addition, SOC was quantified for 20-cm depth intervals to 100 cm depths. Over a 1 year period, gas samples for carbon dioxide (CO2) and oxygen (O2) analyses were collected from 7 different soil depths (5 to 80 cm) at the shoulder- and footslope positions. Soil surface CO2 fluxes were measured over a shorter period (January to June 2012). Results showed that : topsoil temperature sensitivity of SOC turnover was independent of slope position; subsoil SOC stocks and temperature sensitivity of turnover depend on slope position; soil surface CO2 effluxes were similar at shoulderslope and footslope positions

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2014, vol. 120 [pp. 20-28]

Bibliographic references : 1 p.

Collation : 6 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2014.03.014

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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