Dynamics of soil organic and inorganic carbon in the cropland of upper Yellow River Delta, China

Guo, Yang; Wang, Xiujun; Li, Xianglan; Wang, Jiaping; Xu, Minggang; Li, Dongwei

doi:10.1038/srep36105

Cited by 66 publications

(80 citation statements)

References 24 publications

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“…In our previous works, we sampled at 31 sites in the upper Yellow River Delta in August 2015 28 and 24 sites in Hebei Plain in early October 2015 9 . In this study, we chose representative sites: 10 sites near the Yellow River and 21 sites far away.…”

Section: Methodsmentioning

confidence: 99%

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Characteristics of soil C:N ratio and δ13C in wheat-maize cropping system of the North China Plain and influences of the Yellow River

Shi

Wang

et al. 2017

Sci Rep

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To better understand the characteristics of soil organic matter (SOM) in the North China Plain, we evaluate the large scale variations of soil organic carbon (SOC), total nitrogen (TN), carbon to nitrogen (C:N) ratio and stable carbon isotopic compositions (δ13C) in SOC over 0–100 cm. To assess the influence of the Yellow River, 31 sites are selected from the wheat-maize double cropping system, and grouped into two: 10 sites near and 21 sites far from the river. Our data show that mean soil C:N ratio is low (7.6–9.9) across the region, and not affected by the Yellow River. However, SOC and TN are significantly (P < 0.05) lower in subsoil near the Yellow River (2.0 and 0.2–0.3 g kg−1 for SOC and TN) than far away (3.1 and 0.4 g kg−1); δ13C is significantly more negative below 60 cm near the river (−23.3 to −22.6‰) than far away (−21.8 to −21.4‰). We estimate that the contributions of wheat and maize to SOC are 61.3–68.1% and 31.9–38.8%, respectively. Our analyses indicate that the overall low levels of SOC in the North China Plain may be associated with the low soil C:N ratio and less clay content. The hydrological processes may also partly be responsible, particularly for those near the Yellow River.

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Section: Methodsmentioning

confidence: 99%

“…Our recent study showed that soils near the Yellow River contain higher levels of salts relative to those far away from the river 9,28 . There were evidence that high soil salinity inhibits organic matter decomposition 29,30 , thus one may assume that the SOM level would be greater near the Yellow River.…”

Section: Introductionmentioning

confidence: 95%

Characteristics of soil C:N ratio and δ13C in wheat-maize cropping system of the North China Plain and influences of the Yellow River

Shi

Wang

et al. 2017

Sci Rep

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“…Structural equation modeling (SEM) effectively distinguished specific cause and effect-linkages between observed variables (Qiu et al 2018), and was utilized to establish a link between shrub encroachment and soil C via soil nutrient stoichiometry ratios and enzyme stoichiometry ratios. The model was simplified to meet the T-rule (Grace 2006), which specifies that the number of estimated parameters (this number in our study was 7 or 8) must be less than or equal to the number of known variances and covariances (this number in our study was 10). Jobson transformation Soil stoichiometry modulates effects of shrub encroachment on soil carbon was used to normalize data and minimize kurtosis before SEM.…”

Section: Data Analysesmentioning

confidence: 99%

Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland

Ding¹,

Wang²,

Zhang³

et al. 2020

iForest

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There is little information available on the mediating effects of soil nutrient stoichiometry and enzyme stoichiometry on soil carbon (C) during shrub encroachment and their contributions to changes in soil C. Here, we characterized the concentration and stock of soil organic carbon (SOC), inorganic carbon (SIC) and total carbon (STC) along the shrub encroachment sequence (SES). We constructed linkages between soil C and SES with soil nutrient stoichiometric ratios and C-, nitrogen-and phosphorus-acquiring enzyme stoichiometry ratios using structural equation modeling (SEM), and disentangled the contributions of the soil nutrient stoichiometric ratios and enzyme stoichiometric ratios to shaping SOC and SIC using redundancy analysis (RDA) and SEM. Results revealed that the increases in STC stock derived from the increases in both the SOC stock and the SIC stock. Soil stoichiometric ratios played a mediating role in structuring soil C over SES, the mediating pattern depended on soil stoichiometry types (nutrient stoichiometry or enzyme stoichiometry) and soil C types (SOC, SIC or STC). Soil nutrient stoichiometric ratios contributed more than soil enzyme stoichiometric ratios to the variation in SOC and STC, while the contributions of these two types of soil stoichiometric ratios to the variation in SIC changed with soil stoichiometry types. Soil nutrient stoichiometry had positive or negative or threshold effects on soil C, but soil enzyme stoichiometry had monotonously increasing effects on soil C. This study showed that the soil stoichiometry had modulatory effects on soil C during shrub encroachment in the subalpine grassland, China.

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“…Sufficient soluble Ca 2+ /Mg 2+ in soil results in carbonate precipitation [57]. Accordingly, one of the main limiting factors for inorganic CO 2 sequestration is exhaustion of calcium sources in soil.…”

Section: Inorganic Co 2 Sequestrationmentioning

confidence: 99%

Sequestering Atmospheric CO2 Inorganically: A Solution for Malaysia’s CO2 Emission

et al. 2018

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Malaysia is anticipating an increase of 68.86% in CO2 emission in 2020, compared with the 2000 baseline, reaching 285.73 million tonnes. A major contributor to Malaysia’s CO2 emissions is coal-fired electricity power plants, responsible for 43.4% of the overall emissions. Malaysia’s forest soil offers organic sequestration of 15 tonnes of CO2 ha−1·year−1. Unlike organic CO2 sequestration in soil, inorganic sequestration of CO2 through mineral carbonation, once formed, is considered as a permanent sink. Inorganic CO2 sequestration in Malaysia has not been extensively studied, and the country’s potential for using the technique for atmospheric CO2 removal is undefined. In addition, Malaysia produces a significant amount of solid waste annually and, of that, demolition concrete waste, basalt quarry fine, and fly and bottom ashes are calcium-rich materials suitable for inorganic CO2 sequestration. This project introduces a potential solution for sequestering atmospheric CO2 inorganically for Malaysia. If lands associated to future developments in Malaysia are designed for inorganic CO2 sequestration using demolition concrete waste, basalt quarry fine, and fly and bottom ashes, 597,465 tonnes of CO2 can be captured annually adding a potential annual economic benefit of €4,700,000.

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Dynamics of soil organic and inorganic carbon in the cropland of upper Yellow River Delta, China

Cited by 66 publications

References 24 publications

Characteristics of soil C:N ratio and δ13C in wheat-maize cropping system of the North China Plain and influences of the Yellow River

Characteristics of soil C:N ratio and δ13C in wheat-maize cropping system of the North China Plain and influences of the Yellow River

Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland

Sequestering Atmospheric CO2 Inorganically: A Solution for Malaysia’s CO2 Emission

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