Influences of soil properties and hydrological processes on soil carbon dynamics in the cropland of North China Plain

Zhang, Wenxi; Wang, Xiujun; Lu, Tongping; Shi, Hangbo; Zhao, Yu

doi:10.1016/j.agee.2020.106886

Cited by 24 publications

(23 citation statements)

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“…Our analyses show that DOC:SOC ratio is higher in YCB (0.76-1.88 %) than in LFB (0.61-1.24 %), with a signi cant difference below 40 cm (Table 2), which indicates stronger desorption of SOC in the subsoils of YCB. Similarly, Zhang et al (2020) reported greater DOC:SOC ratio close to the Yellow River over 60-100 cm, relative to those in other parts of North China Plain. Apparently, the YCB and other regions that have shorter distance to the Yellow River are in uenced by stronger hydrological processes (such as water movements), which would result in more desorption and remove of DOC thus lower levels of SOC in subsoils (Zhang et al 2020).…”

Section: Regulating Factors For Socmentioning

confidence: 75%

“…For instance, there is evidence that high soil pH often leads to low levels of SOC but high levels of SIC (Oste et al 2002, Tavakkoli et al 2015, Wang et al 2015a. Recent studies suggest that hydrologic process may have in uences on various fractions of soil carbon, including dissolved organic (DOC) and inorganic carbon (DIC) that result from the desorption of organic matter and the dissolution of inorganic carbon, respectively (Shi et al 2017b, Zhang et al 2020. There is evidence that higher levels of CaCO 3 or Ca 2+ /Mg 2+ are bene cial for SOC stabilization (Tavakkoli et al 2015, Virto et al 2011 because of enhanced formation of soil aggregates (Rowley et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Fractions of soil organic and inorganic carbon and their relationships in typical loess cropland of Fenggu Basin

Wang

Zhang

2020

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There is evidence of connections between soil organic carbon (SOC) and inorganic carbon (SIC) in dryland of north China. However, fractions of SOC and SIC and the relationship are not well understood in the Loess Plateau that undergoes profound erosion and redeposition. A study was conducted in low-elevation cropland of Loess Plateau across two distinctive basins: Lingfeng basin (LFB) with lower soil pH (< 8.4) and subject to erosion-redeposition, and Yuncheng basin (YCB) with higher soil pH (> 8.6) and under the influence of the Yellow River. Soil samples were collected from 30 sites over 100 cm. We determined SOC, SIC, dissolved organic carbon (DOC) and other properties. Above 100 cm, SOC stock is significantly higher in LFB (10.0 ± 2.6 kg C m− 2) than in YCB (6.9 ± 1.5 kg C m− 2), but SIC lower in LFB (14.0 ± 2.5 kg C m− 2) than in YCB (17.0 ± 5.7 kg C m− 2). We find a significantly negative correlation between SOC and SIC stocks in LFB, but no clear relationship in YCB. On average, DOC:SOC ratio is significantly higher below 40 cm in YCB (1.9%) than LFB (1.2%), indicating stronger DOC desorption in YCB that has stronger hydrological process due to the influence of the Yellow River. Overall, SOC has a negative correlation with SIC and soil pH, and DOC:SOC ratio has a significantly positive correlation with soil pH. Our analyses suggest that erosion/re-deposition of topsoil is partly responsible for the negative SIC-SOC relationship in LFB, and high soil pH and stronger hydrological processes are attributable to relatively lower levels of SOC in YCB. This study highlights that soil carbon fractions in the lowland of Loess Plateau are influenced by many drivers, which leads to complex relationships between major soil carbon pools.

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Section: Regulating Factors For Socmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Fractions of soil organic and inorganic carbon and their relationships in typical loess cropland of Fenggu Basin

Wang

Zhang

2020

Preprint

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“…The relative low levels of SOC in those loess croplands may be largely related to the texture of loess that has less clay thus less protection for SOM (Li et al 2019, Li et al 2017. In addition, hydrological processes associated with the Yellow River may lead to enhanced desorption/removal of DOC from soil pro le, which is partly responsible for the relatively lower SOC in the loess croplands (Shi et al 2017b, Zhang et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, there is evidence that high soil pH/salinity often leads to low levels of SOC (partly due to low stability of SOC) (Chen et al 2017, Demoling et al 2007, but high levels of SIC probably owing to high levels of Ca 2+ /Mg 2+ (Oste et al 2002, Wang et al 2015a. Recent studies suggest that hydrologic processes may have in uences on various fractions of soil carbon (Lu et al 2020, Zhang et al 2020, particularly on dissolved organic carbon (DOC) and inorganic carbon (DIC), which could alter the SIC-SOC relationship. For example, low SOC stability (under high pH/salinity) often result in more desorption of DOC (Mavi et al 2012) whereas hydrologic processes may enhance both desorption of DOC and the dissolution of SIC (Shi et al 2017b, Zhang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies suggest that hydrologic processes may have in uences on various fractions of soil carbon (Lu et al 2020, Zhang et al 2020, particularly on dissolved organic carbon (DOC) and inorganic carbon (DIC), which could alter the SIC-SOC relationship. For example, low SOC stability (under high pH/salinity) often result in more desorption of DOC (Mavi et al 2012) whereas hydrologic processes may enhance both desorption of DOC and the dissolution of SIC (Shi et al 2017b, Zhang et al 2020). On the other hand, there is also evidence that higher levels of CaCO 3 or Ca 2+ /Mg 2+ are bene cial for SOC stabilization (Tavakkoli et al 2015, Virto et al 2011 because of enhanced formation of soil aggregates (Rowley et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Total and dissolved soil organic and inorganic carbon and their relationships in typical loess cropland of Fenggu Basin

Wang

Zhang

2020

Preprint

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There is evidence of connections between soil organic carbon (SOC) and inorganic carbon (SIC) in dryland of north China. However, fractions of SOC and SIC and the relationship are not well understood in the Loess Plateau that undergoes profound erosion and redeposition. A study was conducted in low-elevation cropland of Loess Plateau across two distinctive basins: Linfen basin (LFB) with lower soil pH (<8.4) and subject to erosion-redeposition, and Yuncheng basin (YCB) with higher soil pH (>8.6) and under the influence of the Yellow River. Soil samples were collected from 30 sites over 100 cm. We determined SOC, SIC, dissolved organic carbon (DOC) and other properties. Above 100 cm, SOC stock is significantly higher in LFB (10.0±2.6 kg C m-2) than in YCB (6.9±1.5 kg C m-2), but SIC lower in LFB (14.0±2.5 kg C m-2) than in YCB (17.0±5.7 kg C m-2). We find a significantly negative correlation between SOC and SIC stocks in LFB, but no clear relationship in YCB. DOC:SOC ratio (an indicator for DOC desorption or SOC stability) is significantly higher below 40 cm in YCB (1.9%) than LFB (1.2%), indicating stronger DOC desorption in YCB that has stronger hydrological process due to the influence of the Yellow River. Overall, SOC has a negative correlation with SIC and soil pH, and DOC:SOC ratio has a significantly positive correlation with soil pH. Our analyses suggest that erosion/re-deposition of topsoil is partly responsible for the negative SIC-SOC relationship in LFB, and high soil pH and stronger hydrological processes are attributable to relatively lower levels of SOC in YCB. This study highlights that soil carbon fractions in the lowland of Loess Plateau are influenced by many drivers, which leads to complex relationships between major soil carbon pools.

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Rapid change in soil properties after converting grasslands to crop production

Strock

Johnson

Tollefson³

et al. 2022

Agronomy Journal

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Changes to land management over the last 150 years, primarily the conversion of perennial grasslands to agricultural production dominated by annual row crops, have greatly changed soil properties and reduced the soil's ability to infiltrate and store water in the soil profile. Direct near-term response at the time of conversion of an uncultivated remnant prairie to row crops is rare, especially responses that include repeated measurements on the same parcel of land and resampling of soils to a depth of 1 m to document rapid changes in soil organic carbon, nitrogen, and selected soil physical properties related to hydraulic properties. The objective of this research was to measure changes in soil chemical and physical properties after the conversion of perennial grassland to annual row-crop production. A before-and-after approach was used to compare soil properties from a 0.31-ha field in southwest Minnesota. Cultivation resulted in a negative shift in soil properties. Two years postcultivation, there was an overall reduction in soil organic carbon of 18.6 Mg ha −1 for the 0-1.0 m soil profile. Infiltration rates and soil sorptivity exhibited significant decreases following cultivation. The average decrease in the mean postcultivation infiltration and sorptivity rates were 0.30 mm s −1 and 0.12 mm s −0.5 , respectively. Bulk density increased on average by 0.10 Mg m −3 between 0-0.2 m and 0.14 Mg m −3 between 0.2-1.0 m. This work provided a rare glimpse of the vast shift in soil properties, which occurred when the plow ripped through virgin prairie decades ago during the massive expansion of agriculture.

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Influences of soil properties and hydrological processes on soil carbon dynamics in the cropland of North China Plain

Cited by 24 publications

References 64 publications

Fractions of soil organic and inorganic carbon and their relationships in typical loess cropland of Fenggu Basin

Fractions of soil organic and inorganic carbon and their relationships in typical loess cropland of Fenggu Basin

Total and dissolved soil organic and inorganic carbon and their relationships in typical loess cropland of Fenggu Basin

Rapid change in soil properties after converting grasslands to crop production

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