The significant role of inorganic matters in preservation and stability of soil organic carbon in the Baoji and Luochuan loess/paleosol profiles, Central China

Auteur(s) et Affiliation(s)

WANG, C.

College of Resources and Environmental Sciences, Agricultural Univ., Nanjing, Chine

LI, F.

College of Resources and Environmental Sciences, Agricultural Univ., Nanjing, Chine

SHI, H.

College of Resources and Environmental Sciences, Agricultural Univ., Nanjing, Chine

JIN, Z.

State Key Lab. of Loess and Quaternary Geology, Inst. of Earth Environment, CAS, Xi'an, Chine

SUN, X.

College of Resources and Environmental Sciences, Agricultural Univ., Nanjing, Chine

ZHANG, F.

State Key Lab. of Loess and Quaternary Geology, Inst. of Earth Environment, CAS, Xi'an, Chine

WU, F.

State Key Lab. of Loess and Quaternary Geology, Inst. of Earth Environment, CAS, Xi'an, Chine

KAN, S.

College of Resources and Environmental Sciences, Agricultural Univ., Nanjing, Chine

Description :
To understand the preservation time and mechanisms of soil organic carbon (SOC) under burial conditions, the distributions of total organic carbon (TOC) and stable organic carbon (StOC), and their correlations with the contents of clays and clay minerals and different forms of iron oxides were investigated in the Baoji and Luochuan loess–paleosol profiles. The results highlight that : StOC was preserved in the loess and paleosol after 375 kyr since their deposition; Kaolinite might play chemical and physical roles in the fixation of organic carbon; The TOC was highly correlated with amorphous oxides of iron (Feo) mainly affected by sorption, and complex iron (Fep)affected by complexation on SOC preservation.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 109, p. 186-194, nombre de pages : 9, Références bibliographiques : 29 ref.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais