Mapping surface soil organic carbon density of cultivated land using machine learning in Zhengzhou DOI Creative Commons
Hengliang Guo,

Jinyang Wang,

Dujuan Zhang

et al.

Environmental Geochemistry and Health, Journal Year: 2024, Volume and Issue: 47(1)

Published: Nov. 28, 2024

Research on soil organic carbon (SOC) is crucial for improving sinks and achieving the "double-carbon" goal. This study introduces ten auxiliary variables based data from a 2021 land quality survey in Zhengzhou multi-objective regional geochemical survey. It uses geostatistical ordinary kriging (OK) interpolation, as well classical machine learning (ML) models, including random forest (RF) support vector (SVM), to map density (SOCD) topsoil layer (0 − 20 cm) of cultivated land. partitions sampling assess generalization capability with Zhongmu County designated an independent test set (dataset2) remaining training (dataset1). The three models are trained using dataset1, directly applied dataset2 evaluate compare their performance. distribution SOCD SOCS soils various types textures analyzed optimal interpolation method. results indicated that: (1) average SOC densities predicted by OK RF, SVM 3.70, 3.74, 3.63 kg/m2, precisions (R2) 0.34, 0.60, 0.81, respectively. (2) ML achieves significantly higher predictive precision than traditional interpolation. RF model's 0.21 model more precise estimating stock. (3) When dataset2, exhibited superior capabilities (R2 = 0.52, MSE 0.32) over 0.32, 0.45). (4) spatial surface area exhibits decreasing gradient west east south north. total stock estimated at approximately 10.76 × 106t. (5) integration attribute variables, climatic remote sensing data, techniques holds significant promise high-precision high-quality mapping agricultural soils.

Language: Английский

Effects of urbanization on the water cycle in the Shiyang River basin: based on a stable isotope method DOI Creative Commons
Rui Li, Guofeng Zhu,

Siyu Lu

et al.

Hydrology and earth system sciences, Journal Year: 2023, Volume and Issue: 27(24), P. 4437 - 4452

Published: Dec. 18, 2023

Abstract. In water-scarce arid areas, the water cycle is affected by urban development and natural river changes, urbanization has a profound impact on hydrological system of basin. Through an ecohydrological observation established in Shiyang River basin inland zone, we studied using isotope methods. The results showed that significantly changed process accelerated rainfall-runoff due to increase land area, mean residence time (MRT) fluctuating downward trend from upstream downstream was shortest area middle reaches, MRT mainly controlled landscape characteristics addition, our study groundwater data were progressively enriched construction metropolitan dams, which exacerbated evaporative losses also strengthened hydraulic connection between around city. Our findings have important implications for local resource management planning provide insights into hydrologic dynamics areas.

Language: Английский

Citations

56
Role of soil microplastic pollution in climate change DOI
Rogers Wainkwa Chia, Jin‐Yong Lee, Minwook Lee

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 887, P. 164112 - 164112

Published: May 11, 2023

Language: Английский

Citations

44
Elucidating the impacts of microplastics on soil greenhouse gas emissions through automatic machine learning frameworks DOI

Xintong Lin,

Jie Hou, Xinyue Wu

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 916, P. 170308 - 170308

Published: Jan. 24, 2024

Language: Английский

Citations

7
Structure and assembly mechanism of soil bacterial community under different soil salt intensities in arid and semiarid regions DOI Creative Commons
Yuxi Wei, Lijuan Chen, Qi Feng

et al.

Ecological Indicators, Journal Year: 2024, Volume and Issue: 158, P. 111631 - 111631

Published: Jan. 1, 2024

Soil salinization has become the most expansive form of soil degradation in arid and semiarid regions, management is imperative for achieving sustainable development. microorganisms are supposed to play an integral role controlling salinization, effects high-salt environments on microbial community have been widely investigated, but there currently limited comprehensive study taxon co-occurrence patterns assembly processes under different salt intensities. Here, based high-throughput sequencing technologies, we analysed bacterial structure mechanism intensity regions. The results demonstrated that diversity was negatively correlated with salinity, also varied changes intensity. Solonchaks (soils high soluble accumulation) had lowest average degree network, a lower level connectivity correlation among bacteria solonchaks compared other salt-affected soils. highest competitive connections were detected light-intensity saline soils, whereas overall collaborative increased salinity. For network stability, rare taxa (with each taxon’s relative abundance < 0.1%) more essential than abundant (> 1%). As salinity increased, stochastic gradually dominated assembly, dispersal limitation contributed from 45.18% 58.73%. These findings offered valuable information about how affected would be useful salinization.

Language: Английский

Citations

4
Spatial and Temporal Variations in Soil Organic Carbon in Northwestern China via Comparisons of Different Methods DOI Creative Commons
Jinlin Li, Ning Hu, Yuxin Qi

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(3), P. 420 - 420

Published: Jan. 26, 2025

Soil organic carbon (SOC) is a crucial component for investigating cycling and global climate change. Accurate data exhibiting the temporal spatial distributions of SOC are very important determining soil sequestration potential formulating strategies. An scheme mapping to establish link between environmental factors via different methods. The Shiyang River Basin third largest inland river basin in Hexi Corridor, which has closed geographical conditions relatively independent cycle system, making it an ideal area research arid areas. In this study, 65 samples were collected 21 assessed from 2011 2021 Basin. linear regression (LR) method two machine learning methods, i.e., support vector (SVR) random forest (RF), applied estimate distribution SOC. RF slightly better than SVR because its advantages comparison classification. When latitude, slope, normalized vegetation index (NDVI) used as predictor variables, best performance shown. Compared with Harmonized World Database (HWSD), optimal improved accuracy significantly. Finally, tended increase, total increase 135.94 g/kg across whole basin. northwestern part middle decreased by 2.82% industrial activities. Minqin County increased approximately 62.77% 2021. Thus, variability increased. This study provides theoretical basis basins. addition, can also provide effective scientific suggestions projects, offer key understanding cycle, change adaptation mitigation

Language: Английский

Citations

0
Carbon Sequestration through Organic Amendments, Clay Mineralogy and Agronomic Practices: A Review DOI Open Access
Singh Shivangi, Omkar Singh,

Uday Pratap Shahi

et al.

Egyptian Journal of Soil Science, Journal Year: 2024, Volume and Issue: 64(2), P. 581 - 598

Published: Feb. 23, 2024

Carbon sequestration (CS) is a significant method for reducing climate change (CC) and enhancing soil fertility in agriculture. Many people are becoming increasingly worried about change, researchers have been studying soils as way to store CO2. Due their significance regulating the global carbon cycle, methods of organic (SOC) stabilization recently garnered considerable interest. SOC dynamics, focusing on how clay mineralogy affects retention stabilization. Understanding stabilisation works can help implementing effective management practices storing matter (SOM), improving structure, greenhouse gas emissions. The effectiveness depends amount quality SOM, type, topography, mineral CC. Soil has lost result inadequate crop strategies. Over world, 456 Pg stored dead above-ground vegetation, compared 1417 first metre soil. agricultural sector accountable 25-30% total worldwide (GHG) emissions form CO2, N2O, CH4. Soils that lot more hence having healthy assist combating change. In addition, sequester SOC, it important use materials like manure, minerals found soil, different types compost, poultry waste, incorporating leftover plant parts, biochar, proper farming covering with mulch, planting cover crops, managing nutrients, using mulch effectively. These increase improve its physical chemical characteristics, carbon, which ultimately helps mitigating

Language: Английский

Citations

2
Differences in soil fungal communities under salinity gradients in arid and semiarid regions DOI
Yuxi Wei, Lijuan Chen, Zhenliang Yin

et al.

Global and Planetary Change, Journal Year: 2024, Volume and Issue: 236, P. 104425 - 104425

Published: March 23, 2024

Language: Английский

Citations

2
Snowmelt and subsurface heterogeneity control tree water sources in a subalpine forest DOI Creative Commons
Stefano Brighenti, Nikolaus Obojes, Giacomo Bertoldi

et al.

Ecohydrology, Journal Year: 2024, Volume and Issue: 17(7)

Published: July 17, 2024

Abstract In high mountain areas, snowmelt water is a key—yet fading—hydrological resource, but its importance for soil recharge and tree root uptake understudied. these environments, heterogeneous terrains enhance highly variable availability of groundwater resources that can be accessed by plants. We conducted tracer‐based study on subalpine forest in the Italian Alps. investigated isotopic composition ( 2 H 18 O) snowmelt, precipitation, spring water, water—at different locations depths—and xylem twigs taken from alpine larch, Swiss stone pine alpenrose plants during bi‐weekly field campaigns (growing seasons 2020 2021). Mixing models based δ O revealed large contribution to particularly early summer. depths using sap flow records date back end‐member signatures. found flexible use shallow deeper plants, with more likely used larger trees late Results data were combined geophysical observations subsurface structure develop conceptual model about exploitation depending their location (shallow slope vs. saturated area). Our highlights relevance high‐elevation terrestrial ecosystems, where substrates shape at and, turn,

Language: Английский

Citations

2
Vertical distribution characteristics of soil organic carbon and vegetation types under different elevation gradients in Cangshan, Dali DOI Creative Commons

Xue Yang,

Jianhong Xu,

Huifang Wang

et al.

PeerJ, Journal Year: 2024, Volume and Issue: 12, P. e16686 - e16686

Published: Jan. 4, 2024

Background The Cangshan National Nature Reserve of Dali City was adopted as the research object to clarify vertical distribution characteristics soil organic carbon (SOC) and vegetation types at different elevations in western Yunnan. Methods contents SOC, light fraction (LFOC), heavy (HFOC), water-soluble (WSOC) 0–30 cm layer (2,400, 2,600, 2,800, 3,000, 3,200, 3,400, 3,600 m) were determined, above-ground investigated. Results showed that SOC content highest 0–20 surface gradually decreased with deepening layer. It increased then increase elevation, it peaked 3,000 m. LFOC between 1.28 7.3515 g kg −1 . exhibited a decreasing trend little change profile distribution. HFOC ranged 12.9727 23.3708 ; depth. WSOC 235.5783 392.3925 mg , response sensitivity elevation weak. With WSOC/SOC LFOC/SOC similar trend, whereas presented an opposite trend. This observation indicates active m lower than 2,400 m, middle conducive storage carbon. Meanwhile, physical chemical properties affected certain extent. type survey dominant species within 2,400–2,800 Pinus yunnanensis armandii Many evergreen mixed coniferous broadleaf forests distributed from 3,200 Species Abies delavayi mainly 3,400 serves reference for study forest stability high-elevation areas plays important role formulating reasonable land use management policies, protecting soil, reducing loss, investigating sequestration ecosystems.

Language: Английский

Citations

1
Soil carbon storage under different types of arid land use in Algeria DOI Creative Commons
Abderraouf Benslama, Fouzi Benbrahim,

Lydia Rym-Gadoum

et al.

Environmental Geochemistry and Health, Journal Year: 2024, Volume and Issue: 46(9)

Published: July 17, 2024

Abstract This study aims to assess the amount of organic carbon stored in soils, as it is an intention knowing sustainable soil management, by using two common methods for determining matter (SOM), namely oxidation with acidified wet dichromate (Walkley–Black method-WB) and loss on ignition (LOI). The was carried samples collected from a depth 0 30 cm Saharan arid region Ghardaïa (Algeria), different land uses: agricultural, forest pastoral. results obtained LOI WB were subjected statistical analysis, relations between both tested investigate their relationship. mean percentage SOM values 1.86, 2.42, 1.54 LOI, but, lower 0.34, 0.33, 0.36 determined method, pastoral soils respectively. A weak linear relationship analytical procedures (R 2 0.19 0.13 agricultural soils), while medium = 0.65) found when adjustment. However, opposite behaviour we use logarithmic outcomes indicated discrepancies measurements methods, been higher those estimated LOI. Finally, order identify best methodology measure more research required these extreme regions they are gap world maps.

Language: Английский

Citations

1