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| Titel |
Conventional tillage versus organic farming in relation to soil organic carbon stock in olive groves in Mediterranean rangelands (southern Spain) |
| VerfasserIn |
L. Parras-Alcántara, B. Lozano-García |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 5, no. 1 ; Nr. 5, no. 1 (2014-05-15), S.299-311 |
| Datensatznummer |
250115269
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| Publikation (Nr.) |
 copernicus.org/se-5-299-2014.pdf |
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| Zusammenfassung |
| Soil organic carbon (SOC)
concentration is a soil variable subject to changes. The management system is
a key factor that influences these changes. To determine the long-term
effects of the management system on SOC stocks (SOCS) in olive groves, 114
soil profiles were studied in the Los Pedroches Valley (Mediterranean
rangelands – southern Spain) for 20 years. The management practices were
conventional tillage (CT) and organic farming (OF) in four soil types:
Cambisols (CMs), Regosols (RGs), Luvisols (LVs) and Leptosols (LPs). Soil
properties were statistically analysed by management techniques, soil types
and horizons. Significant differences (p < 0.05) were found between soil
types and management practices. It was equally observed that the management
system affected SOCS. In addition, the total SOCS during the 20-year
experiment increased in OF with respect to CT by 72 and 66% in CMs and
LVs respectively. SOC showed significant differences for horizons (p < 0.05) in relation to the management type. The stratification ratio (SR) was
used as an indicator of soil quality based on the influence of surface SOC
levels on erosion control, water infiltration and nutrient conservation with
respect to deep layers. The SR of SOC from the surface to depth was greater
in CT compared to OF with the exception of RGs. In all cases, the SR of SOC
was >2. These results indicate high soil quality and that management
practices affect SOC storage in the Los Pedroches Valley. |
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