Spatial variability of soil organic carbon in different hillslope positions in Toshan area, Golestan Province, Iran: Geostatistical approaches

Bameri, Abolfazl; Khormali, Farhad; Kiani, Farshad; Dehghani, Amir Ahmad

doi:10.1007/s11629-014-3213-z

Cited by 11 publications

(6 citation statements)

References 45 publications

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“…As indicated by Maleki et al (2014) and Bameri et al (2015) topographic attributes are important with regard to SOC variations in surface soil of cultivated lands in this area. Moreover, role of slope gradient and aspect on SOC storage, especially in 0-100 cm soil layer, was not studied in Iran.…”

Section: Introductionmentioning

confidence: 66%

Environmental factors controlling soil organic carbon storage in loess soils of a subhumid region, northern Iran

et al. 2016

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Section: Introductionmentioning

confidence: 66%

Environmental factors controlling soil organic carbon storage in loess soils of a subhumid region, northern Iran

et al. 2016

Self Cite

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“…For instance, Van Oost et al (2005) measured on two field crop sites under temperate climate, a clear correlation between the erosion-deposition rates and the topsoil Corg concentration, which ranged between 0.8 % of the erosion to 1.4% of the deposition sites in the top 25 cm of the soil. Besides this, Bameri et al (2015) in a field crop site with a semi-arid environment, measured also a higher Corg in lower part of the field where deposition of the eroded soil from the upper zones took place with a mean Corg value of 0.95% in the top 20 cm of the soil and a CV of 53%. Overall, under such landscapes cultivated for a long time, the cumulative effect of tillage and water erosion on the redistribution of soil across the slope has been observed (Dlugoß et al, 2012).…”

Section: Discussionmentioning

confidence: 72%

Variation of soil organic carbon, stable isotopes and soil quality indicators across an eroding-deposition catena in an historical Spanish olive orchard

Gómez¹,

Guzmán²,

Toloza³

et al. 2019

Preprint

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Abstract. This study compares the distribution of bulk soil organic carbon (SOC also reported as Corg), its fractions (unprotected, physical, chemical and biochemically protected), available P (Pavail), organic nitrogen (Norg) and stable isotopes (δ15N and δ13C) signatures at four soil depths (0–10, 10–20, 20–30, 30–40 cm) between a nearby forested reference area and an historical olive orchard (established in 1856) located in Southern Spain. In addition, these soil properties, as well as water stable aggregates (Wsagg) were contrasted at eroding and deposition areas within the olive orchard, previously determined using 137Cs. Results highlight a significant depletion of SOC stock in the olive orchard as compared to the forested area, approximately 120 vs. 55 t C ha−1 at the top 40 cm of soil respectively, being severe in the case of unprotected carbon fraction. Erosion and deposition within the old olive orchard created large differences in soil properties along a catena, resulting in higher Corg, Pavail and Norg contents and δ15N at the deposition area and therefore defining two areas with a different soil quality status (degraded vs. non-degraded). Differences in δ15N at such different catena locations suggest that this isotopic signature has the potential for being used as an indicator of soil degradation magnitude, although additional studies would be required to confirm this finding. These overall results indicate that proper understanding of Corg content and soil quality in olive orchards require the consideration of the spatial variability induced by erosion/deposition processes for a convenient appraisal at farm scale.

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“…In addition, available phosphorus (P avail ) was determined by the Olsen method (Olsen and Sommers, 1982), and organic nitrogen (N org ) was determined by the Kjeldahl method (Stevenson, 1982). Water-stable aggregates (W sagg ) were measured using the method of Barthes and Roose (2002). Soil particle size distribution was determined using the hydrometer method (Bouyoucos, 1962) for the topsoil (0-10 cm) of the reference area and the olive orchard.…”

Section: Physicochemical Analysismentioning

confidence: 99%

Variation of soil organic carbon, stable isotopes, and soil quality indicators across an erosion–deposition catena in a historical Spanish olive orchard

Gómez¹,

Guzmán²,

Toloza³

et al. 2020

SOIL

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Abstract. This study compares the distribution of bulk soil organic carbon (SOC), its fractions (unprotected and physically, chemically, and biochemically protected), available phosphorus (Pavail), organic nitrogen (Norg), and stable isotope (δ15N and δ13C) signatures at four soil depths (0–10, 10–20, 20–30, and 30–40 cm) between a nearby open forest reference area and a historical olive orchard (established in 1856) located in southern Spain. In addition, these soil properties, as well as water stable aggregates (Wsagg), were contrasted at eroding and deposition areas within the olive orchard, previously determined using 137Cs. SOC stock in the olive orchard (about 40 t C ha−1) was only 25 % of that in the forested area (about 160 t C ha−1) in the upper 40 cm of soil, and the reduction was especially severe in the unprotected organic carbon. The reference and the orchard soils also showed significant differences in the δ13C and δ15N signals, likely due to the different vegetation composition and N dynamics in both areas. Soil properties along a catena, from erosion to deposition areas within the old olive orchard, showed large differences. Soil Corg, Pavail and Norg content, and δ15N at the deposition were significantly higher than those of the erosion area, defining two distinct areas with a different soil quality status. These overall results indicate that the proper understanding of Corg content and soil quality in olive orchards requires the consideration of the spatial variability induced by erosion–deposition processes for a convenient appraisal at the farm scale.

show abstract

Spatial variability of soil organic carbon in different hillslope positions in Toshan area, Golestan Province, Iran: Geostatistical approaches

Cited by 11 publications

References 45 publications

Environmental factors controlling soil organic carbon storage in loess soils of a subhumid region, northern Iran

Environmental factors controlling soil organic carbon storage in loess soils of a subhumid region, northern Iran

Variation of soil organic carbon, stable isotopes and soil quality indicators across an eroding-deposition catena in an historical Spanish olive orchard

Variation of soil organic carbon, stable isotopes, and soil quality indicators across an erosion–deposition catena in a historical Spanish olive orchard

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