Rebuilding soil organic C stocks in degraded grassland by grazing exclusion: a linked decline in soil inorganic C.
Grassland restoration
Profile distribution
Semi-arid region
Soil carbon stocks
Soil inorganic carbon
Soil organic carbon
Journal
PeerJ
ISSN: 2167-8359
Titre abrégé: PeerJ
Pays: United States
ID NLM: 101603425
Informations de publication
Date de publication:
2020
2020
Historique:
received:
12
12
2019
accepted:
25
03
2020
entrez:
16
5
2020
pubmed:
16
5
2020
medline:
16
5
2020
Statut:
epublish
Résumé
Our study evaluated how soil organic carbon (SOC) and soil inorganic carbon (SIC) recovered over time in deep loessial soil as overgrazed grassland was fenced and restored. The study was conducted in the Yunwu Mountain Nature Reserve in the Ningxia Autonomous Region of China. In it we compared soil data from three grazed grassland (G) sites, three sites that were fenced for 15 years (F15), and three sites that were fenced for 30 years (F30) as a so-called 'space for time series'. We compared SOC accumulation in soil up to 200 cm below the surface in G, F15, and F30 plots. An increase in SOC correlated with a decrease in soil pH, and decreased soil bulk density. However, SOC sequestration in fenced plots was largely offset by a decrease in SIC, which was closely correlated ( Our data indicate that fencing causes the slow diffusion processes to intensify the soil property changes from increased litter return, and this slow diffusion process is still active 30 years after fencing at 100-200 cm soil depths in the studied deep loessial soil. These findings are likely applicable to similar sites.
Sections du résumé
BACKGROUND
BACKGROUND
Our study evaluated how soil organic carbon (SOC) and soil inorganic carbon (SIC) recovered over time in deep loessial soil as overgrazed grassland was fenced and restored.
METHODS
METHODS
The study was conducted in the Yunwu Mountain Nature Reserve in the Ningxia Autonomous Region of China. In it we compared soil data from three grazed grassland (G) sites, three sites that were fenced for 15 years (F15), and three sites that were fenced for 30 years (F30) as a so-called 'space for time series'.
RESULTS AND DISCUSSION
CONCLUSIONS
We compared SOC accumulation in soil up to 200 cm below the surface in G, F15, and F30 plots. An increase in SOC correlated with a decrease in soil pH, and decreased soil bulk density. However, SOC sequestration in fenced plots was largely offset by a decrease in SIC, which was closely correlated (
CONCLUSIONS
CONCLUSIONS
Our data indicate that fencing causes the slow diffusion processes to intensify the soil property changes from increased litter return, and this slow diffusion process is still active 30 years after fencing at 100-200 cm soil depths in the studied deep loessial soil. These findings are likely applicable to similar sites.
Identifiants
pubmed: 32411518
doi: 10.7717/peerj.8986
pii: 8986
pmc: PMC7207218
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e8986Informations de copyright
©2020 Zhang et al.
Déclaration de conflit d'intérêts
The authors declare there are no competing interests.
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