Neoformation of pedogenic carbonates by irrigation and fertilization and their contribution to carbon sequestration in soil

Bughio, Mansoor Ahmed; Wang, Panlei; Meng, Fanqiao; Chen, Qing; Kuzyakov, Yakov; Wang, Xiujun; Junejo, S. A.

doi:10.1016/j.geoderma.2015.08.003

Cited by 103 publications

(69 citation statements)

References 52 publications

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“…A similar phenomenon was observed by Wang et al (Wang, Wang, Xu, et al, 2015). The δ 13 C-SIC can be used to differentiate between LIC and PIC, due to their distinct isotopic signatures, which are linked to trace the sources of carbonate (Bughio et al, 2016). It has been evidenced that the depleted δ 13 C-SIC indicates the formation of PIC after changes in the land use pattern (Bughio et al, 2016;Jin et al, 2014;Liu et al, 2014;Wang et al, 2014;Wang, Wang, Xu, et al, 2015).…”

Section: Implications Of Stable Carbon Isotopes For the Reasons Of supporting

confidence: 75%

“…The δ 13 C-SIC can be used to differentiate between LIC and PIC, due to their distinct isotopic signatures, which are linked to trace the sources of carbonate (Bughio et al, 2016). It has been evidenced that the depleted δ 13 C-SIC indicates the formation of PIC after changes in the land use pattern (Bughio et al, 2016;Jin et al, 2014;Liu et al, 2014;Wang et al, 2014;Wang, Wang, Xu, et al, 2015). Accordingly, the decrease in δ 13 C-SIC in shrubland and forestland in our study (Table 5) indicated an enhancement in PIC due to vegetation rehabilitation.…”

Section: Implications Of Stable Carbon Isotopes For the Reasons Of mentioning

confidence: 99%

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Effects of vegetation rehabilitation on soil organic and inorganic carbon stocks in the Mu Us Desert, northwest China

et al. 2017

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In arid and semiarid areas, the importance of soil inorganic carbon (SIC) is at least as high as that of soil organic carbon (SOC) in affecting the regional carbon budget following vegetation rehabilitation. However, variations in SIC have been uncertain, and few studies have analyzed the interactions between the SOC and SIC pools. We measured SIC, SOC, δ13C‐SIC, and δ13C‐SOC after planting Mongolian pine (MP) and Artemisia ordosica (AO) on shifting sand land (SL) over 10 years in the Mu Us Desert, northwest China. The results showed that, compared to SL, SIC stocks at 0–100 cm in MP and AO lands significantly increased by 12.6 and 25.8 Mg ha−1, respectively; SOC stocks in MP and AO lands significantly increased by 24.0 and 38.4 Mg ha−1, respectively. Both δ13C‐SIC and δ13C‐SOC in the 2 plantation lands were significantly lower than those in SL were. All 315 samples exhibited a negatively linear relationship between SIC content and δ13C‐SIC (R2 = .70, p < .01) and showed positively linear relationships between SIC content and SOC content (R2 = .69, p < .01) and between δ13C‐SIC and δ13C‐SOC (R2 = .61, p < .01). The results demonstrated that vegetation rehabilitation on SL has a high potential to sequester SIC and SOC in semiarid deserts. The reduction in δ13C‐SIC and the relationship of SIC with δ13C‐SIC following vegetation rehabilitation suggested that SIC sequestration is likely caused by the formation of pedogenic inorganic carbon. The relationships between SIC and SOC and between δ13C‐SIC and δ13C‐SOC implied that the pedogenic inorganic carbon formation may be closely related to the SOC accumulation.

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Section: Implications Of Stable Carbon Isotopes For the Reasons Of supporting

confidence: 75%

Section: Implications Of Stable Carbon Isotopes For the Reasons Of mentioning

confidence: 99%

Effects of vegetation rehabilitation on soil organic and inorganic carbon stocks in the Mu Us Desert, northwest China

et al. 2017

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“…CaCO 3 in the soils are grouped as pedogenic (newly developed as a result of dissolution and recrystallization of primary carbonates and other soil forming processes) and nonpedogenic (from the parent material; Kuzyakov, Shevtzova, & Pustovoytov, ). The occurrence of pedogenic carbonate (PC) is a characteristic phenomenon of the arid and semiarid regions and their formation is more active in agricultural soils (Bughio et al, ). The depth distribution of carbonates is determined by the mean annual rainfall, topography, and percolation of water in the soil profile (Gocke, Pustovoytov, & Kuzyakov, ).…”

Section: Discussionmentioning

confidence: 99%

A conceptual model of natural land degradation based on regressive pedogenesis in semiarid tropical environments

et al. 2018

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Land degradation occurs in all the climatic regions, however, the adverse effects are more pronounced in the semiarid tropical (SAT) environments due to increasing aridity and water scarcity. Though natural processes can also cause land degradation, it is generally attributed to anthropogenic factors. In this study, we elucidate the role of climate and landscape driven soil forming processes in land degradation through a conceptual model. For this, morphological, physical, and chemical properties of the soils occurring in a part of the SAT Deccan Plateau region, India, were characterized. The trend of climatic variables, namely, the mean annual rainfall, potential evapotranspiration, and maximum summer temperature during the last century (1901–2010) showed that the increase in aridity negatively influenced the soil forming processes. The results showed that rainfall variability, temperature, potential evapotranspiration, and hydrological behaviour of the SAT soils were the primary drivers of the soil forming processes and they were identified through examination of the soil variability by factor analysis. The depth distribution of selected indicators (% clay, pH, calcium carbonate, exchangeable sodium percentage, exchangeable magnesium percentage, and hydraulic conductivity) indicated that the current pedogenic processes operating in the SAT environment caused the undesirable modification in soil properties. Through our conceptual model, we discuss the mechanism of the formation of pedogenic carbonate, subsoil sodicity, and subsequent reduction in hydraulic conductivity which leads to the land and vegetation degradation in the SAT environments.

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“…The region has a warm temperate climate, with a semi-humid continental monsoon and an average annual temperature of 13.2°C ranging from a maximum of 26.8°C in July to a minimum of -2.9°C in January. Mean annual precipitation is 543 mm, mainly occurring in July to September, and the average annual sunshine duration is 2330 h (Bughio et al, 2016). Parent material of the soil is holocene Loess (10000 a B.P.)…”

Section: Experimental Designmentioning

confidence: 99%

“…About 100 m from the experimental greenhouse, a natural planting (NP) plot was chosen as a native undisturbed reference site, which had received no cropping or any other anthropogenic perturbation since 1974. The plot had been intentionally reserved to compare the impacts of land use change and farming practices on soil properties (Bughio et al, 2016).…”

Section: Experimental Designmentioning

confidence: 99%

Intensive organic vegetable production increases soil organic carbon but with a lower carbon conversion efficiency than integrated management

Zhao

Bol

et al. 2020

J. Plant Nutr. Soil Sci.

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Intensive vegetable production in greenhouses has rapidly expanded in China since the 1990s and increased to 1.3 million ha of farmland by 2016, which is the highest in the world. We conducted an 11‐year greenhouse vegetable production experiment from 2002 to 2013 to observe soil organic carbon (SOC) dynamics under three management systems, i.e., conventional (CON), integrated (ING), and intensive organic (ORG) farming. Soil samples (0–20 and 20–40 cm depth) were collected in 2002 and 2013 and separated into four particle‐size fractions, i.e., coarse sand (> 250 µm), fine sand (250–53 µm), silt (53–2 µm), and clay (< 2 µm). The SOC contents and δ13C values of the whole soil and the four particle‐size fractions were analyzed. After 11 years of vegetable farming, ORG and ING significantly increased SOC stocks (0–20 cm) by 4008 ± 36.6 and 2880 ± 365 kg C ha−1 y−1, respectively, 8.1‐ and 5.8‐times that of CON (494 ± 42.6 kg C ha−1 y−1). The SOC stock increase in ORG at 20–40 cm depth was 245 ± 66.4 kg C ha−1 y−1, significantly higher than in ING (66 ± 13.4 kg C ha−1 y−1) and CON (109 ± 44.8 kg C ha−1 y−1). Analyses of 13C revealed a significant increase in newly produced SOC in both soil layers in ORG. However, the carbon conversion efficiency (CE: increased organic carbon in soil divided by organic carbon input) was lower in ORG (14.4%–21.7%) than in ING (18.2%–27.4%). Among the four particle‐sizes in the 0–20 cm layer, the silt fraction exhibited the largest proportion of increase in SOC content (57.8% and 55.4% of the SOC increase in ORG and ING, respectively). A similar trend was detected in the 20–40 cm soil layer. Over all, intensive organic (ORG) vegetable production increases soil organic carbon but with a lower carbon conversion efficiency than integrated (ING) management.

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Neoformation of pedogenic carbonates by irrigation and fertilization and their contribution to carbon sequestration in soil

Cited by 103 publications

References 52 publications

Effects of vegetation rehabilitation on soil organic and inorganic carbon stocks in the Mu Us Desert, northwest China

Effects of vegetation rehabilitation on soil organic and inorganic carbon stocks in the Mu Us Desert, northwest China

A conceptual model of natural land degradation based on regressive pedogenesis in semiarid tropical environments

Intensive organic vegetable production increases soil organic carbon but with a lower carbon conversion efficiency than integrated management

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