A high-resolution map of soil organic carbon in cropland of Southern China

CATENA, Год журнала: 2024, Номер 237, С. 107813 - 107813

Опубликована: Янв. 12, 2024

Язык: Английский

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Soil organic carbon sequestration in agricultural long-term field experiments as derived from particulate and mineral-associated organic matter

Geoderma, Год журнала: 2023, Номер 434, С. 116472 - 116472

Опубликована: Апрель 19, 2023

Soil organic matter (SOM) is indispensable for soil health and, in the context of climate change, considered a significant CO2 sink. Improving agricultural management to increase long-term carbon (SOC) stocks mitigating change requires tools that estimate short and long-cycling SOM pools. In this study, we analyzed changes fast-cycling particulate (POM) slow-cycling mineral-associated (MAOM) induced by common practices, i.e., fertilization crop rotation topsoils from 25 Central European field experiments. When relating MAOM-C contents recent saturation levels, estimated sequestration potentials were only met coarse-textured soils under appropriate or fine-textured extreme fertilization. texture, fertilization, below-ground OC inputs through root exudates biomass decisive estimating MAOM-C, allowing calibration mixed-effects model (Nakagawa's: marginal R2m = 0.6, conditional R2c 0.89). While models containing texture parameters can be validated generalized (R2 0.43), input predictor substantially decreases generalizability 0.14). According quantile regression models, average difference concentration between well-managed control site (without fertilization) 4.1 mg g−1 soil. dependence on bulk density, amounts 1.38 – 1.84 t ha−1 5.06 10.1 CO2-equivalents. POM-C was difficult predict 0.28), presumably due strong POM dynamics. The / ratio inform effects practices before/after comparisons. Under increasing SOC concentration, an indicates do not transfer real sequestration. Because depends also covariate limiting it comparisons sites with different textures. However, our data indicate experiment constantly approximate when POM-C/MAOM-C >0.35. This might used as goal prevent over-fertilization N loss, especially soils. Thereby, help optimize support mitigation strategies Europe.

Язык: Английский

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Learning vs. understanding: When does artificial intelligence outperform process-based modeling in soil organic carbon prediction?

New Biotechnology, Год журнала: 2024, Номер 81, С. 20 - 31

Опубликована: Март 8, 2024

In recent years, machine learning (ML) algorithms have gained substantial recognition for ecological modeling across various temporal and spatial scales. However, little evaluation has been conducted the prediction of soil organic carbon (SOC) on small data sets commonly inherent to long-term research. this context, performance ML SOC never tested against traditional process-based approaches. Here, we compare algorithms, calibrated uncalibrated models as well multiple ensembles their in predicting using from five experimental sites (comprising 256 independent points) Austria. Using all available data, ML-based approaches Random forest support vector machines with a polynomial kernel were superior models. performed similar or worse when number training samples was reduced leave-one-site-out cross validation applied. This emphasizes that is strongly dependent data-size related quality information following well-known curse dimensionality phenomenon, while accuracy significantly relies proper calibration combination different Our study thus suggests superiority at scales where larger datasets are available, tools targeting exploration underlying biophysical biochemical mechanisms dynamics soils. Therefore, recommend applying combine advantages both

Язык: Английский

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Soil Organic Carbon Assessment for Carbon Farming: A Review

Agriculture, Год журнала: 2025, Номер 15(5), С. 567 - 567

Опубликована: Март 6, 2025

This review is motivated by the urgent need to improve soil organic carbon (SOC) assessment methods, which are vital for enhancing health, addressing climate change, and promoting farming. By employing a structured approach that involves systematic literature search, data extraction, analysis, 86 relevant studies were identified. These evaluated address following specific research questions: (a) What state-of-the-art approaches in sampling, modeling, acquisition? (b) key challenges, open issues, potential advancements, future directions needed enhance effectiveness of farming practices? The findings indicate while traditional SOC techniques remain foundational, there significant shift towards incorporating model-based machine learning models, proximal spectroscopy, remote sensing technologies. emerging primarily serve as complementary laboratory analyses, overall accuracy reliability assessments. Despite these challenges such spatial temporal variability, high financial costs, limitations measurement continue hinder progress. also highlights necessity scalable, cost-effective, precise tools, alongside supportive policies incentives encourage farmer adoption. Finally, development “System-of-Systems” integrates sensing, modeling offers promising pathway balancing cost accuracy, ultimately supporting practices.

Язык: Английский

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On-farm soil organic carbon sequestration potentials are dominated by site effects, not by management practices

Geoderma, Год журнала: 2023, Номер 433, С. 116466 - 116466

Опубликована: Апрель 5, 2023

Although conservation agriculture practices evidently facilitate the build-up of soil organic carbon (SOC), sequestration potential arable soils is strongly mediated by edaphic attributes; so far, their interplay not well understood. Deciphering these drivers however important to correctly estimate SOC storage potentials in and derive effective strategies for implementation successful measures. By using an on-farm approach, we conducted a pairwise comparison 21 conventional highly innovative 'pioneer' farms across wide range types evaluated leverage site attributes management such as crop diversity, reduced tillage, fertilization, cover cropping inter on potential. While most pioneer proved beneficial – particularly diversity our results clearly show that texture was significant shaping factor. Coarse-textured had significantly higher accrual compared medium- fine-textured soils. The initial content also effect prevalent potentials. Based fact clear predominance natural conditions over impacts enhancing soils, call critical discussion farming schemes. As similar efforts costs implementing measures will have distinctive gains, dependent environmental constraints beyond farmers' influence, advocate harmonizing both activity- results-based approaches maximize ecological effectiveness spatial dissemination health innovations. Carbon schemes thus need reconsideration within state-of-the-art scientific framework saturation behaviour order properly account biophysical when formulating soil-related climate change mitigation policies.

Язык: Английский

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Managing the pore system: Regenerating the functional pore spaces of natural soils by soil-health oriented farming systems

Soil and Tillage Research, Год журнала: 2023, Номер 234, С. 105862 - 105862

Опубликована: Авг. 26, 2023

Transition towards soil-health sustaining crop production is at the core of climate change mitigation and adaptation efforts in agriculture. Improving soil conditions for resilience to variable extreme weather are among main expectations farmers implementing sustainable management practices. In this study, we evaluate whether transition from conventional arable oriented farming systems restores pore characteristics non-arable natural soils identify factors predominantly shaping different domains. Pore size distributions (PSD) 20 sites with diverse types adjacent fields (1) standard arable, (2) health-oriented pioneer (3) reference were measured. Based on parametric PSD descriptors, management-responsive functional classes role textural, biochemical structural drivers domains analysed by a novel data-driven evaluation method. Parametric descriptors indicate an evolution non-disturbed intensively disturbed larger pores within less heterogeneous domain. These shifts go along medium-sized storage pores, which overall was most sensitive fraction. Our approach confirmed partial regeneration The responsive domain found range ∼0.3–0.5 µm. SOC-to-clay ratio predominant driver porosity both soils. On contrary, texture exerted control pattern over entire systems. Overall, our study demonstrated that could effectively advance managing functionally relevant promoting biological agents structure formation.

Язык: Английский

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Changes in microbial physiology and carbon-use efficiency upon improving soil habitat conditions in conservation farming systems

Agriculture Ecosystems & Environment, Год журнала: 2024, Номер 377, С. 109246 - 109246

Опубликована: Авг. 22, 2024

Язык: Английский

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Unleashing the sequestration potential of soil organic carbon under climate and land use change scenarios in Danish agroecosystems

The Science of The Total Environment, Год журнала: 2023, Номер 905, С. 166921 - 166921

Опубликована: Сен. 12, 2023

Future global climate changes are expected to increase soil organic carbon (SOC) decomposition. However, the combined effect of C inputs, land use changes, and on SOC turnover is still unclear. Exploring this SOC-climate-land interaction allows us understand stabilization mechanisms examine whether can act as a source or sink for CO2. The current study estimates sequestration potential in topsoil layer Danish agricultural lands by 2038, considering change future scenarios using Rothamsted Carbon (RothC) model. Additionally, we quantified loss vulnerability existing projected based capacity stabilize OC. We used quantile random forest model estimate initial stock 2018, simulated with RothC business-as-usual (BAU) scenario crop rotation (LUC) under conditions 2038. compared stocks saturation deficit. ranged from 10 181 Mg ha-1 different parts country. projections showed 8.1 BAU 6 after LUC adoption. This was strongly influenced warmer temperatures clay content. proposed became mitigation measure against negative accumulation, especially sandy soils high livestock density. A accumulation C-saturated suggests an non-complexed SOC, which vulnerable being lost into atmosphere With these results, provide information prioritize areas where management practices be adopted enhance stable forms preserve labile-existing stocks.

Язык: Английский

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Impact of tillage practices and soil texture on soil health and earthworms in the Pannonian region: A comparative study from Austria and Hungary

Applied Soil Ecology, Год журнала: 2025, Номер 206, С. 105863 - 105863

Опубликована: Янв. 5, 2025

Язык: Английский

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Significant advances in plant-available and replenishable macro- and micronutrients with soil health-oriented conservation farming: Novel insights from a multi-site on-farm evaluation

Geoderma, Год журнала: 2025, Номер 457, С. 117275 - 117275

Опубликована: Апрель 9, 2025

Язык: Английский

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