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Overgrazing decreases soil organic carbon stocks the most under dry climates and low soil pH: A meta-analysis shows

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Title Overgrazing decreases soil organic carbon stocks the most under dry climates and low soil pH: A meta-analysis shows
 
Creator Dlamini, Phesheya
 
Contributor Chivenge, Pauline
Chaplot, Vincent
 
Subject soc stocks
controlling factors
grassland degradation
spatial variation
 
Description Grasslands occupy about 40% of the world’s land surface and store approximately 10% of the global soil
organic carbon (SOC) stock. This SOC pool, in which a larger proportion is held in the topsoil (0–0.3 m), is
strongly influenced by grassland management. Despite this, it is not yet fully understood how grassland
SOC stocks respond to degradation, particularly for the different environmental conditions found
globally. The objective of this review was to elucidate the impact of grassland degradation on changes in
SOC stocks and the main environmental controls, worldwide, as a prerequisite for rehabilitation. A
comprehensive meta-analysis was conducted using 55 studies with 628 soil profiles under temperate,
humid, sub-humid, tropical and semi-arid conditions, to compare SOC stocks in the topsoil of nondegraded
and degraded grassland soils. Grassland degradation significantly reduced SOC stocks by 16% in
dry climates (1000 mm) and Asia was the most affected
continent ( 23.7%). Moreover, the depletion of SOC stock induced by degradation was more pronounced
in sandy (
 
Date 2017-01-16
2017-02-08T22:59:11Z
2017-02-08T22:59:11Z
 
Type Journal Article
 
Identifier http://oar.icrisat.org/id/eprint/9847
https://mel.cgiar.org/reporting/download/hash/73sSaxwC
Phesheya Dlamini, Pauline Chivenge, Vincent Chaplot. (16/1/2017). Overgrazing decreases soil organic carbon stocks the most under dry climates and low soil pH: A meta-analysis shows. Agriculture, Ecosystems and Environment, 221, pp. 258-269.
https://hdl.handle.net/20.500.11766/5590
Limited access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Elsevier Masson
 
Source Agriculture, Ecosystems and Environment;221,(2017) Pagination 258,269