Schlagwort: soil carbon sequestration

New Publications

Prairie et al. (2023): Restoring particulate and mineral-associated organic carbon through regenerative agriculture

Aaron M. Prairie, Alison E. King, M. Francesca Cotrufo IN: PNAS, https://doi.org/10.1073/pnas.2217481120

To better understand soil organic carbon (SOC ) formation and persistence, the authors separate it into two distinct forms, particulate organic carbon (POC) and mineral associated (MAOC). This study presents results from a global meta-analysis on the response of SOC, POC, and MAOC, to regenerative agricultural practices including no-till, cropping system intensification, and integrated crop–livestock (ICL). The authors found that regenerative practices increased both POC and MAOC, thus improving soil health and promoting long-term carbon storage.

LINK

#
New Publications

Pant et al. (2023): Soil and Ocean Carbon Sequestration, Carbon Capture, Utilization, and Storage as Negative Emission Strategies for Global Climate Change

Divya Pant, Kabita Kumari Shah, Sadikshya Sharma, Maya Bhatta, Subina Tripathi, Hari Prasad Pandey, Himanshu Tiwari, Jiban Shrestha, Ashbin Kumar Bhat IN: Journal of Soil Science and Plant Nutrition, https://doi.org/10.1007/s42729-023-01215-5

The authors estimate global negative emission technologies (NETs) potentials based on extensive literature study in 2050 for BECCS, ocean carbon sequestration, biochar, DAC, and soil carbon sequestration.

LINK

#
New Publications

Wiltshire & Beckage (2023): Integrating climate change into projections of soil carbon sequestration from regenerative agriculture

Serge Wiltshire, Brian Beckage IN: PLOS Climate, https://doi.org/10.1371/journal.pclm.0000130

Computational models can project how changes in land use and management will affect soil organic carbon (SOC) stocks over time, but these models usually assume an unchanging climate. The authors investigate how incorporating climate change projections affects carbon sequestration and SOC stocks. They apply the Rothamsted Carbon model (RothC) to study agricultural land use and management transitions in the U.S. state of Vermont, comparing several regenerative farming strategies, as well as afforestation, against business-as-usual. In 11 relatively-homogeneous Ecoregions within the study area, they run simulations for each land management scenario from 2022–2099, under both projected climate change and the static climate normal from 1991–2021.

LINK

#
New Publications

Tan & Kuebbing (2023): A synthesis of the effect of regenerative agriculture on soil carbon sequestration in Southeast Asian croplands

Stanley S.X. Tan, Sara E. Kuebbing IN: Agriculture, Ecosystems & Environment 349, 108450, https://doi.org/10.1016/j.agee.2023.108450

The authors reviewed 92 empirical studies that investigated the effects of 17 regenerative farming practices across 11 broad categories of crops on SOC stock or content in Southeast Asia. Their synthesis found supporting evidence for the use of organic amendments like biochar, compost, and manure, as well as cover cropping, crop rotation, and conservation tillage to increase SOC. 

LINK

#
New Publications

Yan et al. (2023): Wollastonite addition stimulates soil organic carbon mineralization: Evidences from 12 land-use types in subtropical China

Yongxue Yan, Xiaohan Dong, Renshan Li, Yankuan Zhang, Shaokui Yan, Xin Guan, Qingpeng Yang, Longchi Chen, Yunting Fang,  Weidong Zhang, Silong Wang IN: CATENA 225, 107031, https://doi.org/10.1016/j.catena.2023.107031.

Enhanced rock weathering through adding silicate rock powder to soil has been increasingly considered as an effective means of removing CO2 from the atmosphere. However, the potential impact of silicate rock powder addition on the stability of soil organic carbon remains largely unknown, which adds an uncertainty to its effectiveness in mitigating atmospheric CO2. In this study, the response of soil CO2 efflux to wollastonite addition was evaluated for 12 land-use types in a subtropical region of China through an incubation experiment.

LINK

#
New Publications

Canatoy et al. (2023): Importance of biochar as a key amendment to convert rice paddy into carbon negative

Ronley C. Canatoy, Seung Tak Jeong, Song Rae Cho, Snowie Jane C. Galgo, Pil Joo Kim IN: Science of The Total Environment 873, https://doi.org/10.1016/j.scitotenv.2023.162331

To evaluate the net impact of biochar application on the net global warming potential (GWP) in rice paddy, no organic amendment (control), fresh manure, compost, and biochar treatments were selected during the whole investigation period. Compared to compost, biochar application decreased annual CH4 and N2O emissions by 55 and 31 %, respectively. Biochar application converted rice paddy into a C sink having a net GWP of −0.104 to −0.191 Mg CO2-eq ha−1.

LINK

#
Political Papers

Powlson & Galdos (2023): Challenging claimed benefits of soil carbon sequestration for mitigating climate change and increasing crop yields: heresy or sober realism?

David S. Powlson, Marcelo V. Galdos IN: Global Change Biology, https://doi.org/10.1111/gcb.16640

The two claims challenged by the authors are: 1. Sequestration of C in agricultural soils can make a substantial contribution to climate change mitigation. 2. Increasing SOC will routinely lead to increased crop yields and contribute to global food security. The authors are particularly critical of these two assertions being combined to make the claim that SOC sequestration is a “win-win” strategy. They point out that climate change and food security have both been described as “wicked problems” of “daunting complexity” so blanket solutions that claim to solve both “should prompt some degree of scepticism.”

LINK

#
Events

Webinar: Scrubbing the Skies: Certifying Soil Carbon Removals

Tue, March 14, 2023, 1:00 PM – 2:00 PM EDT hosted by Institute for Carbon Removal Law and Policy

In this webinar „Certifying soil carbon removals: A soil-focussed assessment of the proposal for the European Framework for Carbon Removal Certification“, two German-based researchers, Anne Siemons (Öko-Institut) and Hugh McDonald (Ecologic Institute) will introduce and critically assess the EU’s latest carbon removal policy proposal. In particular, they will evaluate whether the policy proposal will lead to high-quality soil carbon removals that are long-lasting, additional, robustly quantified, and sustainable.

LINK

#
New Publications

Dupla et al. (2023): Potential accumulation of toxic trace elements in soils during enhanced rock weathering

Xavier Dupla, Benjamin Möller, Philippe C. Baveye, Stéphanie Grand IN: Soil Science 74 (1); https://doi.org/10.1111/ejss.13343

This study evaluates the legal sustainability of ERW with regard to trace element contents in soils. The authors compare different trace element accumulation scenarios considering a range of rock sources, application rates and national regulatory limits.

LINK

#
Knowledge Transfer

Enhanced Rock Weathering in the Global South: Exploring Potential for Enhanced Agricultural Productivity and Carbon dioxide Drawdown

F. Garrett Boudinot, Gabrielle Dreyfus, Caitlan Frederick, Yifan Powers (Precision Development (PxD) and the Institute for Governance & Sustainable Development (IGSD)); January 2023; 42 pp.

The authors aim to identify opportunities in agriculture with potential benefits for smallholder farmers, either directly or through compensation mechanisms for their environmental services, as well as for GHG mitigation. In identifying these opportunities, the authors will outline the evidence for impact on farmers‘ outcomes and on GHG-mitigation outcomes as well as address challenges in building that evidence, particularly in outcome measurement methods. They will also address practical next steps to build a pathway to scale for the identified opportunities.

LINK

#