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Variations in Soil Organic Carbon after Farmland Conversion to Apple Orchard.
- Source :
- Agronomy; May2024, Vol. 14 Issue 5, p963, 13p
- Publication Year :
- 2024
-
Abstract
- The Chinese Loess Plateau has undergone extensive revegetation to restore degraded land and enhance carbon sequestration. However, soil organic carbon (SOC) sequestrated in the soil profiles of deep-rooted plants has not been fully studied. Here, we investigated the SOC within a 0–23 m profile in farmlands and apple orchards converted from farmlands with different ages (A5, <5 years; A10, ~10 years; A15, ~15 years; A20, >20 years) and the controlling factors on three loess tablelands (Changwu, Qingyang, and Luochuan). The results show that SOC stocks among farmlands and orchards showed no significant difference (p = 0.88); however, SOC stocks showed a trend with tree ages, i.e., a decrease for A5 and A10 but an increase for A15 and A20. For the vertical variability, the SOC stock was the highest within 0–1 m, regardless of the standing age; however, the SOC stock in this layer only accounted for 8.8% of the total SOC stock (97.93 ± 9.18 kg m<superscript>−2</superscript>). Climate accounted for 82% of the variations and controlled the changes in SOC in the 0–1 m range, while soil texture dominated the SOC in the soil below 1 m, accounting for 57% of the SOC variations. The variations in SOC in the thick, unsaturated zones provide implications for future land use management and the sustainability of apple orchards in arid regions. [ABSTRACT FROM AUTHOR]
- Subjects :
- APPLE orchards
CARBON in soils
LAND management
SOIL profiles
CARBON sequestration
Subjects
Details
- Language :
- English
- ISSN :
- 20734395
- Volume :
- 14
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Agronomy
- Publication Type :
- Academic Journal
- Accession number :
- 177459317
- Full Text :
- https://doi.org/10.3390/agronomy14050963