Mots-clés
Agropédologie ; Azote ; Carbone ; Chine ; Formation herbacée ; Gansu ; Géochimie ; Montagne ; Sol cultivé ; Steppe ; Sunan ; Utilisation du solAgropedology ; Carbon ; China ; Cultivated land ; Gansu ; Geochemistry ; Grassland ; Land use ; Mountain ; Nitrogen ; SteppeAgrología ; Aprovechamiento del suelo ; Carbono ; China ; Estepa ; Formación herbácea ; Geoquímica ; Kansou ; Montaña ; Nitrógeno ; Suelo cultivadoThe response of soil organic carbon and nitrogen 10 years after returning cultivated alpine steppe to grassland by abandonment or reseeding
Auteur(s) et Affiliation(s)
SHANG, Z.-H.
State Key Lab. of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Univ., Lanzhou, Chine
CAO, J.-J.
State Key Lab. of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Univ., Lanzhou, Chine
GUO, R.-Y.
Inst. of Arid Agroecology, School of Life Sciences, Univ., Lanzhou, Chine
LONG, R.-J.
State Key Lab. of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Univ., Lanzhou, Chine
DENG, B.
The Inst. of Grassland Science, College of Animal Science and Technology, China Agricultural Univ., Beijing, Chine
Description :
This study reported on the effects on the soil carbon and nitrogen status of alpine steppe soils from 2 restoration methods, reseeding grasses and abandonment. The AA. selected 4 study sites on the north slope of Qilian Mountain : native alpine steppe, cropland of 40 years, former oat cropland reseeded with the grass (Elymus sibiricus) 10 years ago, and cropland abandoned 10 years ago. This experiment measured the soil physical, carbon and nitrogen properties of all selected plots. Ten years after restoration by reseeding or abandonment had resulted in the return of cropland to a perennial grass community through succession, with total soil carbon and nitrogen returning to more than 70% of the original grassland plots. The reseeding method benefited soil carbon and nitrogen more than abandonment after 10 years. The light fraction organic carbon, microbial biomass carbon and microbial biomass nitrogen recovered more quickly than soil organic carbon and total soil nitrogen. In conclusion, the AA. recommend the 2 methods (reseeding and abandonment) as suitable methods to engineer the returning of cultivated land back to grassland in the alpine steppe.
Type de document :
Article de périodique
Source :
Catena (Giessen), issn : 0341-8162, 2014, n°. 119, p. 28-35, nombre de pages : 8, Références bibliographiques : 1 p.
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)