Organic carbon accumulation in a 2000-year chronosequence of paddy soil evolution

Wissing, Livia; Kölbl, Angelika; Vogelsang, Vanessa; Fu, Jing-Li; Cao, Zhihong; Kögel‐Knabner, Ingrid

doi:10.1016/j.catena.2011.07.007

Cited by 96 publications

(65 citation statements)

References 30 publications

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“…Except for the P1000 site where interferences due to dyke maintenance have been reported (Roth et al, 2011;Wissing et al, 2011), a decline in the CV values over cultivation time is noted (Fig. 3c).…”

Section: Discrimination Of Variance Between Sites Versus In-site Usmentioning

confidence: 65%

“…It is postulated that ongoing paddy soil evolution will continuously diminish the intrinsic heterogeneity of young paddy soils and ultimately establish homogeneous soil biogeochemical conditions as a consequence of destruction of aggregates and macropores (Ringrose-Voase et al, 2000) and by formation of an efficient plough pan (Lennartz et al, 2009) via puddling. Verification of paddy soil homogeneity in this investigation will contribute to validating pedogenic and biogeochemical studies of the same chronosequence conducted previously (Cheng et al, 2009;Bannert et al, 2011a, b;Chen et al, 2011;Roth et al, 2011;Wissing et al, 2011). All biogeochemical investigations were carried out using 5 field replicates that were treated statistically and allow assessing whether a composition in one field or a trend over several fields is robust and representative.…”

Section: Mueller-niggemann Et Al: Intra-versus Inter-site Macroscmentioning

confidence: 75%

“…Only the 1000 yr old paddy soil presents an exception ( Fig. 3a) with a higher variation in magnetic susceptibility (18.4 %), which can be explained by a mixture of the paddy soil with adjacent upland soils of different mineralogy caused by topsoil removal and mixing in the course of dyke maintenance work (Roth et al, 2011;Wissing et al, 2011).…”

Section: Bulk Organic and Minerogenic Parametersmentioning

confidence: 99%

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Intra- versus inter-site macroscale variation in biogeochemical properties along a paddy soil chronosequence

Mueller-Niggemann

Bannert²,

Schloter

et al. 2012

Biogeosciences

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Abstract. In order to assess the intrinsic heterogeneity of paddy soils, a set of biogeochemical soil parameters was investigated in five field replicates of seven paddy fields (50, 100, 300, 500, 700, 1000, and 2000 yr of wetland rice cultivation), one flooded paddy nursery, one tidal wetland (TW), and one freshwater site (FW) from a coastal area at Hangzhou Bay, Zhejiang Province, China. All soils evolved from a marine tidal flat substrate due to land reclamation. The biogeochemical parameters based on their properties were differentiated into (i) a group behaving conservatively (TC, TOC, TN, TS, magnetic susceptibility, soil lightness and colour parameters, δ 13 C, δ 15 N, lipids and n-alkanes) and (ii) one encompassing more labile properties or fast cycling components (N mic , C mic , nitrate, ammonium, DON and DOC). The macroscale heterogeneity in paddy soils was assessed by evaluating intra-versus inter-site spatial variability of biogeochemical properties using statistical data analysis (descriptive, explorative and non-parametric). Results show that the intrinsic heterogeneity of paddy soil organic and minerogenic components per field is smaller than between study sites. The coefficient of variation (CV) values of conservative parameters varied in a low range (10 % to 20 %), decreasing from younger towards older paddy soils. This indicates a declining variability of soil biogeochemical properties in longer used cropping sites according to progress in soil evolution. A generally higher variation of CV values (>20-40 %) observed for labile parameters implies a need for substantially higher sampling frequency when investigating these as compared to more conservative parameters. Since the representativeness of the sampling strategy could be sufficiently demonstrated, an investigation of long-term carbon accumulation/sequestration trends in topsoils of the 2000 yr paddy chronosequence under wetland rice cultivation restricted was conducted. Observations cannot be extrapolated to global scale but with coastal paddy fields developed on marine tidal flat substrates after land reclamation in the Zhejiang Province represent a small fraction (<1 %) of the total rice cropping area. The evolutionary trend showed that the biogeochemical signatures characteristic for paddy soils were fully developed in less than 300 yr since onset of wetland rice cultivation. A six-fold increase of topsoil TOC suggests a substantial gain in CO 2 sequestration potential when marine tidal wetland substrate developed to 2000 yr old paddy soil.

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Section: Discrimination Of Variance Between Sites Versus In-site Usmentioning

confidence: 65%

Section: Mueller-niggemann Et Al: Intra-versus Inter-site Macroscmentioning

confidence: 75%

Section: Bulk Organic and Minerogenic Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Intra- versus inter-site macroscale variation in biogeochemical properties along a paddy soil chronosequence

Mueller-Niggemann

Bannert²,

Schloter

et al. 2012

Biogeosciences

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“…The subsoils consist of several B-horizons. More detailed information regarding the soil profile description is given by Wissing et al (2011). In addition to paddy (P) and non-paddy (NP) soils with different ages (50 and 2000 yr), tidal flat samples (estuarine sediment) were taken.…”

Section: Study Sites and Soil Samplingmentioning

confidence: 99%

“…Identification of rice DNA in root material at 1 m depth in a paddy soil further documents rice root penetration deep below the plough pan. We here use 14 C concentrations of plant remains and of SOC fractions, characterized by different stability and mobility, to reveal the pathways of dynamic relocation of SOC into the subsoil and show that, despite the decoupling between topsoil and subsoil regarding OC accumulation (Wissing et al 2011), subsoil OC dynamics is important for understanding the role of soils in the global carbon cycle.…”

Section: Introductionmentioning

confidence: 99%

Origin of Subsoil Carbon in a Chinese Paddy Soil Chronosequence

Bräuer

2013

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ABSTRACT. Rice paddies are highly important agricultural soils in view of their relevance as major staple food provider in the world and their key role in the global carbon cycle, caused by special management practices. A soil chronosequence, consisting of paddy and upland soils, developed on reclaimed estuarine sediments in the Province of Zhejiang, China, was sampled to investigate the influence of duration of agricultural use (50 to 2000 yr) on soil composition. The uniform composition of the parent material provides the unique opportunity to compare the effects of different land management practices (paddy and non-paddy) on soil carbon dynamics and the origin of organic carbon (OC) in top-and subsoils, using 14 C measurements by accelerator mass spectrometry (AMS). The total soil organic carbon (TOC) was split into chemically defined pools of different mobility, namely the acid-and water-soluble fulvic acids (FA), the alkali-soluble humic acids (HA), and insoluble humin fraction. The more mobile HA and FA fractions contain significantly more 14 C than the corresponding TOC and humin, indicating a downward transport of OC in the subsoil. Plant roots with 14 C concentrations up to 128% of the modern standard, found far below the plough pan, reveal plant roots and root exudates as other direct sources of subsoil OC in paddy soils.

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Stability of soil organic matter accumulated under long‐term use as a rice paddy

et al. 2016

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To understand the mechanism responsible for the enhanced accumulation of soil organic matter (SOM) under long-term use as a rice paddy, soil samples from the plow layer from 16 fields that have been used for irrigated rice production from 5 to 2000 years in the Hangzhou Bay, China, were analyzed. The humin in silt/clay particles was isolated as a representative relatively stable SOM pool, and isotopic signatures (δ 13 C, δ 15 N, and 14 C concentration), 13 C nuclear magnetic resonance (NMR) spectra, and biodegradability in an incubation were examined. The amounts of C and N in the bulk soil, silt/clay, and silt/clay-humin increased with increasing period of use as a rice paddy within the east and west zones, respectively. The degree of humification determined for humic acids indicated that the progression of humification did not contribute to the accumulation of C beyond 100 years. The δ 15 N of silt/clay-humin suggested an increase in organic N derived from chemical fertilizer or recent biological fixation with increasing amount of this fraction. The 14 C concentration showed a negative correlation with the amount of silt/clay-humin C. The structural property with regard to 13 C NMR spectra and biodegradability of the silt/clay-humin remained constant with the length of use as a rice paddy or 14 C concentration. These results suggest that the larger C or N accumulation in the soils with a longer rice paddy history can be attributed to an enhancement in the accumulation of recently generated SOM rather than the stable accumulation of humus over the years.

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Organic carbon accumulation in a 2000-year chronosequence of paddy soil evolution

Cited by 96 publications

References 30 publications

Intra- versus inter-site macroscale variation in biogeochemical properties along a paddy soil chronosequence

Intra- versus inter-site macroscale variation in biogeochemical properties along a paddy soil chronosequence

Origin of Subsoil Carbon in a Chinese Paddy Soil Chronosequence

Stability of soil organic matter accumulated under long‐term use as a rice paddy

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