Harnessing soil carbon sequestration to address climate change challenges in agriculture

Soil and Tillage Research, Journal Year: 2023, Volume and Issue: 237, P. 105959 - 105959

Published: Nov. 25, 2023

Language: Английский

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Soil organic carbon models need independent time-series validation for reliable prediction

Communications Earth & Environment, Journal Year: 2023, Volume and Issue: 4(1)

Published: May 8, 2023

Abstract Numerical models are crucial to understand and/or predict past and future soil organic carbon dynamics. For those aiming at prediction, validation is a critical step gain confidence in projections. With comprehensive review of ~250 models, we assess how validated depending on their objectives features, discuss predictive can be improved. We find lack independent using observed time series. Conducting such validations should priority improve the model reliability. Approximately 60% analysed not designed for predictions, but rather conceptual understanding processes. These provide important insights by identifying key processes alternative formalisms that relevant models. argue combining based series improved information flow between will increase reliability predictions.

Language: Английский

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Carbon stabilization pathways in soil aggregates during long-term forest succession: Implications from δ13C signatures

Soil Biology and Biochemistry, Journal Year: 2023, Volume and Issue: 180, P. 108988 - 108988

Published: Feb. 20, 2023

Language: Английский

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Carbon sequestration in the subsoil and the time required to stabilize carbon for climate change mitigation

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(1)

Published: Jan. 1, 2024

Soils store large quantities of carbon in the subsoil (below 0.2 m depth) that is generally old and believed to be stabilized over centuries millennia, which suggests sequestration (CS) can used as a strategy for climate change mitigation. In this article, we review main biophysical processes contribute storage mathematical models represent these processes. Our guiding objective whether process understanding soil movement vertical profile help us assess persistence at timescales relevant Bioturbation, liquid phase transport, belowground inputs, mineral association, microbial activity are contributing formation profiles, represented using diffusion-advection-reaction paradigm. Based on simulation examples measurements from radiocarbon profiles across biomes, found advective diffusive transport may only play secondary role profiles. The difference between root inputs decomposition seems primary determining shape with depth. Using transit time new show small travel through horizons longer than 50 years, implying activities promote CS must take into consideration very long term.

Language: Английский

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Changes in Biological and Chemical Soil Properties in an Austrian Long‐Term Tillage Experiment

European Journal of Soil Science, Journal Year: 2025, Volume and Issue: 76(1)

Published: Jan. 1, 2025

ABSTRACT Conventional tillage, including ploughing after harvest and/or for seedbed preparation, aims to incorporate crop residues and weeds loosen, mix aerate the soil. However, less beneficial effects, such as a loss of soil organic carbon (SOC), are also associated with intensive tillage. This has made reduced minimum tillage systems without increasingly popular in agriculture, contributing health climate change mitigation. We studied effects different on chemical microbial properties long‐term field experiment established fine‐sandy loamy Haplic Chernozem Fuchsenbigl, Austria, 1988. The treatments include conventional (CT) plough cultivator down 30 cm depth, (RT) 15 two three times year, well (MT) treated rotary driller once year 5–8 depth. In 2016, sampling campaign was conducted, alkaline phosphatase, phospholipid fatty acids (PLFAs), nitrogen (N) mineralisation potential were analysed along SOC, active C, total (N t ), CAL extractable phosphorus (P ) potassium (K ). Under MT, these significantly higher compared CT 0–10 cm. deeper layers, parameters showed very few significant differences between treatments. RT yielded intermediate values but not always from CT. PLFA indicators correlated SOC and, even more distinctly, N carbon. high ratio Gram‐positive Gram‐negative bacteria indicates recalcitrant matter top layer MT than

Language: Английский

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Intermittent deep tillage increases soil quality and ecosystem multifunctionality in a Fluvo-aquic soil on the North China Plain

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 374, P. 124085 - 124085

Published: Jan. 17, 2025

Language: Английский

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Ensemble modelling, uncertainty and robust predictions of organic carbon in long‐term bare‐fallow soils

Global Change Biology, Journal Year: 2020, Volume and Issue: 27(4), P. 904 - 928

Published: Nov. 7, 2020

Abstract Simulation models represent soil organic carbon (SOC) dynamics in global (C) cycle scenarios to support climate‐change studies. It is imperative increase confidence long‐term predictions of SOC by reducing the uncertainty model estimates. We evaluated simulated from an ensemble 26 process‐based C comparing simulations experimental data seven bare‐fallow (vegetation‐free) plots at six sites: Denmark (two sites), France, Russia, Sweden and United Kingdom. The decay these has been monitored for decades since last inputs plant material, providing opportunity test decomposition without continuous input new material. were run independently over multi‐year simulation periods (from 28 80 years) a blind with no calibration (Bln) following three scenarios, each different levels information and/or allowing fitting: (a) calibrating parameters separately site (Spe); (b) using generic, knowledge‐based, parameterization applicable Central European region (Gen); (c) combination both strategies (Mix). addressed uncertainties modelling approaches or spin‐up initialization SOC. Changes multi‐model median (MMM) used as descriptors performance. On average across sites, Gen proved adequate describing changes SOC, MMM equal (and standard deviation) 39.2 (±15.5) Mg C/ha compared observed mean 36.0 (±19.7) (last year), indicating sufficiently reliable Moving Mix (37.5 ± 16.7 C/ha) Spe (36.8 19.8 provided only marginal gains accuracy, but modellers would need apply more knowledge greater effort than Gen, thereby limiting wider applicability models.

Language: Английский

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Estimating the carbon storage potential and greenhouse gas emissions of French arable cropland using high‐resolution modeling

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(8), P. 1645 - 1661

Published: Jan. 15, 2021

Abstract Many studies have assessed the potential of agricultural practices to sequester carbon (C). A comprehensive evaluation impacts requires not only considering C storage but also direct and indirect emissions greenhouse gases (GHG) their side effects (e.g., on water cycle or production). We used a high‐resolution modeling approach with Simulateur mulTIdisciplinaire pour les Cultures Standard soil‐crop model quantify soil organic (SOC) potential, GHG balance, biomass production nitrogen‐ water‐related for all arable land in France current cropping systems (baseline scenario) three mitigation scenarios: (i) spatial temporal expansion cover crops, (ii) insertion extension temporary grasslands (two sub‐scenarios) (iii) improved recycling resources as fertilizer. In baseline scenario, SOC decreased slightly over 30 years crop‐only rotations increased significantly crop/temporary grassland rotations. Results highlighted strong trade‐off between rate per unit area (kg ha −1 year ) scenarios areas which they could be applied. As result, while most promising scenario at field scale was (+466 kg stored depth 0.3 m compared baseline, 0.68 Mha), national scale, it by far crops (+131 , 17.62 Mha). Side crop production, irrigation nitrogen varied greatly depending situation. At combining mitigate 54% (−11.2 from 20.5 Mt CO 2 e ), remaining would still lie objective C‐neutral agriculture.

Language: Английский

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Soil carbon is the blind spot of European national GHG inventories

Nature Climate Change, Journal Year: 2022, Volume and Issue: 12(4), P. 324 - 331

Published: April 1, 2022

Language: Английский

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Impacts of straw return coupled with tillage practices on soil organic carbon stock in upland wheat and maize croplands in China: A meta-analysis

Soil and Tillage Research, Journal Year: 2023, Volume and Issue: 232, P. 105786 - 105786

Published: June 2, 2023

Language: Английский

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