IGB

Connexion

(Article of periodic en Anglais - 2014)

Document title

Land use and topographic position control soil organic C and N accumulation in eroded hilly watershed of the Loess Plateau

Authors(s) and Affiliation(s)

ZHU H. (1 2 3) ; WU J. (3) ; GUO S. (1 2) ; HUANG D. (3) ; ZHU Q. (3) ; GE T. (3) ; LEI T. (1 2) ;
(1) State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, CAS, Univ., Yangling, CHINE
(2) State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, Northwest Univ. of Agriculture and Forestry, Shaanxi, Yangling, CHINE
(3) Key Lab. of Agro-ecological Processes in Subtropical Region, Inst. of Subtropical Agriculture, CAS, Hunan, Changsha, CHINE

Abstract

In this study, 5 land uses and 3 topographic positions across an eroded hilly watershed of the Loess Plateau were selected to investigate their effects on soil organic carbon (SOC) and N accumulation. The restored grassland, shrubland and woodland (25 to 30 years) increased SOC and total N by 32% to 119% in the slope and 17% to 81% in the gully, respectively compared with the cropland. It is highlighted that changes in SOC, total N, micobial biomass C and N (MBC and MBN) among topographic positions depend on land use. Therefore, land use, topographic position (erosion and deposition), and their interactions regulate SOC and N accumulation and their labile fractions in the eroded hilly region at a watershed scale. These results suggested that converting cropland to shrubland is an initial strategy to restore degraded ecosystems and increase soil C sequestration in eroded hilly region of the Loess Plateau

Source

Article of periodic

published at : Catena / ISSN 0341-8162

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

Millesime : 2014, vol. 120 [pp. 64-72]

Bibliographic references : 48 ref.

Collation : 4 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2014.04.007

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28681843 : Permanent link - XML version
Powered by Pxxo