Mots-clés
Azote Bassin-versant Carbone Chine Erosion des sols Erosion hydrique Loess Lutte contre l'érosion Pente de versant Plateau Propriétés du sol Restauration écologique Shaanxi Sol cultivé Utilisation du sol Végétation Carbon China Cultivated land Ecological restoration Erosion control Land use Loess Nitrogen Plateau Shaanxi Slope gradient Soil erosion Soil properties Vegetation Water erosion Watershed Aprovechamiento del suelo Carbono Chensi China Cuenca hidrográfica Erosión de los suelos Erosión hídrica Inclinación de la vertiente Loess Lucha contra la erosión Meseta Nitrógeno Propiedades del suelo Restauración ecológica Suelo cultivado VegetaciónLand use and topographic position control soil organic C and N accumulation in eroded hilly watershed of the Loess Plateau
Auteur(s) et Affiliation(s)
ZHU, H.
State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, CAS, Univ., Yangling, Chine
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
Key Lab. of Agro-ecological Processes in Subtropical Region, Inst. of Subtropical Agriculture, CAS, Hunan, Changsha, Chine
WU, J.
Key Lab. of Agro-ecological Processes in Subtropical Region, Inst. of Subtropical Agriculture, CAS, Hunan, Changsha, Chine
GUO, S.
State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, CAS, Univ., Yangling, Chine
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
HUANG, D.
Key Lab. of Agro-ecological Processes in Subtropical Region, Inst. of Subtropical Agriculture, CAS, Hunan, Changsha, Chine
ZHU, Q.
Key Lab. of Agro-ecological Processes in Subtropical Region, Inst. of Subtropical Agriculture, CAS, Hunan, Changsha, Chine
GE, T.
Key Lab. of Agro-ecological Processes in Subtropical Region, Inst. of Subtropical Agriculture, CAS, Hunan, Changsha, Chine
LEI, T.
State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, CAS, Univ., Yangling, Chine
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
Description :
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.
Type de document :
Article de périodique
Source :
Catena (Giessen), issn : 0341-8162, 2014, vol. 120, p. 64-72, nombre de pages : 9, Références bibliographiques : 48 ref.
Date :
2014
Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)