Particulate and mineral-associated organic carbon fractions reveal the roles of soil aggregates under different land-use types in a karst faulted basin of China

Xiao-yu, Peng; Huang, Yong; Duan, Xingwu; Ye, Hua; Liu, Jiaxin

doi:10.1016/j.catena.2022.106721

Cited by 19 publications

(2 citation statements)

References 67 publications

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“…One‐way analyses of variance (ANOVA) followed by Duncan post hoc tests, were conducted to assess differences in SPCs and SIPs of terraces with different modes of construction. Spearman correlation analysis was utilized to explore the relationship between SPCs and SIPs (Peng et al, 2023). The analyses were conducted using IBM SPSS software (version 26.0).…”

Section: Methodsmentioning

confidence: 99%

Mechanical terracing regulates soil physicochemical properties and infiltration processes in the Loess Hilly Region of China

Wang,

Yang,

Peng

et al. 2024

Land Degrad Dev

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The widespread adoption of large‐scale machines has led to a significant shift in terrace construction methods, transitioning from manual labor to mechanical processes. Mechanical terracing, by deeply disturbing the surface and compaction of the soil, has resulted in significant variations in both the soil physicochemical properties (SPCs) and soil infiltration properties (SIPs). However, few studies have been carried out to investigate the impact mechanisms of mechanical terracing on soils. In this study, we conducted detailed field experiments to determine the effects of mechanical terracing on SPCs and SIPs. The results showed that mechanical terracing increased soil compaction and decreased soil porosity and organic matter compared to manual terracing. Moreover, mechanical terracing had lower initial and steady infiltration rates than manual terracing (decreasing by 2.60% and 18.59%, respectively). However, initial and steady infiltration rates significantly improved compared to sloped land, increasing by 20.82% and 54.68%, respectively. The partial least squares path model indicated that bulk weight, organic matter content, and soil texture were the dominant influencing factors of SIPs. The results underscore the critical need to incorporate distinctions between various terrace construction methods into hydrological models for more accurate predictions.

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Section: Methodsmentioning

confidence: 99%

Mechanical terracing regulates soil physicochemical properties and infiltration processes in the Loess Hilly Region of China

Wang,

Yang,

Peng

et al. 2024

Land Degrad Dev

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“…On the one hand, due to having less litter on the surface, a loose soil structure, and an inability to retain organic matter, the input of organic carbon sharply declines. On the other hand, sandy soil hinders soil microbial development and reproduction and reduces organic carbon's ability to accumulate, therefore, the organic carbon content of sandy land is obviously lower than that of other land-use types [27,28]. In the oasis transitional zone, the surface plant residues of forest land accumulate a lot, with obvious humification, and the rich litter and root exudates in the soil make its organic carbon content higher than that of other land-use types, which is consistent with the results found by Arid Rajasthan of India, in that the organic carbon in the surface soil is high [29].…”

Section: Driving Factors Of Organic Carbon Transformation In the Oasi...mentioning

confidence: 99%

The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon

Tang,

Gong,

et al. 2024

Land

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The dynamic fluctuations in the soil organic carbon (SOC) stock, a fundamental part of the terrestrial ecosystem’s carbon stock, are critical to preserving the global carbon balance. Oases in arid areas serve as critical interfaces between oasis ecosystems and deserts, with land use changes within these oases being key factors affecting soil organic carbon turnover. However, the response of the soil SOC-CO2-SIC (soil inorganic carbon) micro-carbon cycle to oasis processes and their underlying mechanisms remains unclear. Five land-use types in the Alar reclamation area—cotton field (CF), orchard (OR), forest land (FL), waste land (WL), and sandy land (SL)—were chosen as this study’s research subjects. Using stable carbon isotope technology, the transformation process of SOC in the varieties of land-use types from 0 to 100 cm was quantitatively analyzed. The results showed the following: (1) The SOC of diverse land-use types decreased with the increase in soil depth. There were also significant differences in SIC-δ13C values among the different land-use types. The PC(%) (0.73 g kg−1) of waste land was greatly higher than that of other land-use types (p < 0.05) (factor analysis of variance). (2) The CO2 fixation in cotton fields, orchards, forest lands, and waste land primarily originates from soil respiration, whereas, in sandy lands, it predominantly derives from atmospheric sources. (3) The redundancy analysis (RDA) results display that the primary influencing factors in the transfer of SOC to SIC are soil water content, pH, and microbial biomass carbon. Our research demonstrates that changes in land use patterns, as influenced by oasis processes, exert a significant impact on the conversion from SOC to SIC. This finding holds substantial significance for ecological land use management practices and carbon sequestration predictions in arid regions, particularly in the context of climate change.

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Agroforestry systems affect soil organic carbon stocks and fractions in deforested landscapes of Amazonia

Suárez,

Segura,

Andrade

2024

Agroforest Syst

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Particulate and mineral-associated organic carbon fractions reveal the roles of soil aggregates under different land-use types in a karst faulted basin of China

Cited by 19 publications

References 67 publications

Mechanical terracing regulates soil physicochemical properties and infiltration processes in the Loess Hilly Region of China

Mechanical terracing regulates soil physicochemical properties and infiltration processes in the Loess Hilly Region of China

The Oasisization Process Promotes the Transformation of Soil Organic Carbon into Soil Inorganic Carbon

Agroforestry systems affect soil organic carbon stocks and fractions in deforested landscapes of Amazonia

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