Changes in soil organic carbon induced by tillage and water erosion on a steep cultivated hillslope in the Chinese Loess Plateau from 1898–1954 and 1954–1998

Li, Y.; Zhang, Q. W.; Reicosky, D. C.; Lindstrom, M. J.; Bai, Leichao; Li, L.

doi:10.1029/2005jg000107

Cited by 46 publications

(49 citation statements)

References 34 publications

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“…Other studies conducted under varied agro-environmental conditions also reported a signifi cant relationship -generally linear -between SOM, 137 Cs and soil erosion/sedimentation (2010) rates (Ritchie et al, 2005;Zhang et al, 2006 Li et al (2007) demonstrated that tillage erosion also moved soil and SOM over cultivated hillslopes, following the same physical mechanisms as water erosion.…”

Section: Discussionmentioning

confidence: 92%

Spatial distribution and content of soil organic matter in an agricultural field in eastern Canada, as estimated from geostatistical tools

Mabit

Bernard

2009

Earth Surf Processes Landf

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Soil erosion induces soil redistribution within the landscape and thus contributes to the spatial variability of soil quality. This study complements a previous experimentation initiated by the authors focusing on soil redistribution as a result of soil erosion, as indicated by caesium-137 ( 137 Cs) measurements, in a small agricultural fi eld in Canada. The spatial variability of soil organic matter (SOM) was characterized using geostatistics, which consider the randomized and structured nature of spatial variables and the spatial distribution of the samples. The spatial correlation of SOM (in percentages) patterns in the topsoil was established taking into account the spatial structure present in the data. A signifi cant autocorrelation and reliable variograms were found with a R 2 ≥ 0·9, thus demonstrating a strong spatial dependence. Ordinary Kriging (OK) interpolation provided the best cross validation (r 2 = 0·35). OK and inverse distance weighting power two (IDW2) interpolation approaches produced similar estimates of the total SOM content of the topsoil (0-20 cm) of the experimental fi eld, i.e. 211 and 213 tonnes, respectively. However, the two approaches produced differences in the spatial distribution patterns and the relative magnitude of some SOM content classes.The spatialization of SOM and soil redistribution variability -as evidenced by 137 Cs measurements -is a fi rst step towards the assessment of the impact of soil erosion on SOM losses to recommend conservation measures.

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Section: Discussionmentioning

confidence: 92%

Spatial distribution and content of soil organic matter in an agricultural field in eastern Canada, as estimated from geostatistical tools

Mabit

Bernard

2009

Earth Surf Processes Landf

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“…Position and terrain attributes in the landscape relative to hillslope curvature or slope segment is also considered an important factor in SC variability (Moore et al, 1993;Pennock et al, 1994;Thompson et al, 1997;Arrouays et al, 1998;Gregorich et al, 1998;Gessler et al, 2000;Chaplot et al, 2001;Polyakov and Lal, 2004;Tsui et al, 2004;Yimer et al, 2006;Yoo et al, 2006;Huang et al, 2007;Li et al, 2007). Hillslope position affects soil moisture content (Beven and Kirkby, 1979;Ticehurst et al, 2007), soil temperature and whether the soil experiences net erosion or deposition.…”

Section: Introductionmentioning

confidence: 98%

Hillslope and catchment scale soil organic carbon concentration: An assessment of the role of geomorphology and soil erosion in an undisturbed environment

Hancock¹,

Murphy²,

Evans³

2010

Geoderma

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“…Ritchie et al, 2007;Li et al, 2007;Zhang et al, 2006;VandenBygaart et al, 2012;Van Oost et al, 2005a;Smith et al, 2005;Quine and Van Oost, 2007). Carbon burial in colluvial soils removes C from the actively cycling C pools in the surface layers to the subsoil, where it continues to decompose, albeit at a slower rate.…”

Section: Z Wang Et Al: the Fate Of Buried Organic Carbon In Colluvimentioning

confidence: 99%

The fate of buried organic carbon in colluvial soils: a long-term perspective

et al. 2014

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Abstract. Colluvial soils are enriched in soil organic carbon (SOC) in comparison to the soils of upslope areas due to the deposition and progressive burial of SOC. This burial of SOC has important implications for the global carbon cycle, but the long-term dynamics of buried SOC remain poorly constrained. We addressed this issue by determining the SOC burial efficiency (i.e. the fraction of originally deposited SOC that is preserved in colluvial deposits) of buried SOC as well as the SOC stability in colluvial soils. We quantified the turnover rate of deposited SOC by establishing sediment and SOC burial chronologies. The SOC stability was derived from soil incubation experiments and the δ 13 C values of SOC. The C burial efficiency was found to decrease with time, reaching a constant ratio of approximately 17 % by about 1000-1500 yr post-burial. This decrease is attributed to the increasing recalcitrance of the remaining buried SOC with time and a less favourable environment for SOC decomposition with increasing depth. Buried SOC in colluvial profiles was found to be more stable and degraded in comparison to SOC sampled at the same depth at a stable reference location. This is due to the preferential mineralisation of the labile fraction of the deposited SOC. Our study shows that SOC responds to burial over a centennial timescale; however, more insight into the factors controlling this response is required to fully understand how this timescale may vary, depending on specific conditions such as climate and depositional environment.

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Changes in soil organic carbon induced by tillage and water erosion on a steep cultivated hillslope in the Chinese Loess Plateau from 1898–1954 and 1954–1998

Abstract: (2007), Changes in soil organic carbon induced by tillage and water erosion on a steep cultivated hillslope in the Chinese Loess

Cited by 46 publications

References 34 publications

Spatial distribution and content of soil organic matter in an agricultural field in eastern Canada, as estimated from geostatistical tools

Spatial distribution and content of soil organic matter in an agricultural field in eastern Canada, as estimated from geostatistical tools

Hillslope and catchment scale soil organic carbon concentration: An assessment of the role of geomorphology and soil erosion in an undisturbed environment

The fate of buried organic carbon in colluvial soils: a long-term perspective

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