A new bioenergy model that simulates the impacts of plant‐microbial interactions, soil carbon protection, and mechanistic tillage on soil carbon cycling

Juice, Stephanie M.; Walter, Christopher A.; Allen, Kara E.; Berardi, Danielle M.; Hudiburg, Tara W.; Sulman, Benjamin N.; Brzostek, Edward R.

doi:10.1111/gcbb.12914

Title: A new bioenergy model that simulates the impacts of plant‐microbial interactions, soil carbon protection, and mechanistic tillage on soil carbon cycling

Journal Article · 11 January 2022 · Global Change Biology. Bioenergy

DOI: https://doi.org/10.1111/gcbb.12914 · OSTI ID:1839453

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Department of Biology West Virginia University Morgantown West Virginia USA, Center for Advanced Bioenergy and Bioproducts Innovation University of Illinois at Urbana‐Champaign Urbana Illinois USA
Department of Biology West Virginia University Morgantown West Virginia USA
Manaaki Whenua Landcare Research Lincoln New Zealand
Center for Advanced Bioenergy and Bioproducts Innovation University of Illinois at Urbana‐Champaign Urbana Illinois USA, Department of Forest, Rangeland and Fire Sciences University of Idaho Moscow Idaho USA
Climate Change Science Institute and Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge Tennessee USA

Abstract Advancing our predictive understanding of bioenergy systems is critical to design decision tools that can inform which feedstock to plant, where to plant it, and how to manage its production to provide both energy and ecosystem carbon (C) benefits. Here, we lay the foundation for that advancement by integrating recent developments in the science of belowground processes in shaping the C cycle into a new bioenergy model, FUN‐BioCROP (Fixation and Uptake of Nitrogen‐Bioenergy Carbon, Rhizosphere, Organisms, and Protection). We show that FUN‐BioCROP can approximate the historical trajectory of soil C dynamics as natural ecosystems were successively converted into intensive agriculture and bioenergy systems. This ability relies in part on a novel tillage representation that mechanistically models tillage as a process that increases microbial access to C. Importantly, the impacts of tillage and feedstock choice also influence FUN‐BioCROP simulations of warming responses with no‐till perennial feedstocks, miscanthus, and switchgrass, having more C that is unprotected and susceptible to warming than tilled annual feedstocks like corn–corn–soybean. However, this susceptibility to warming is balanced by a greater potential for increases in belowground C allocation to enhance soil C stocks in perennial systems. Collectively, our model results highlight the importance of belowground processes in evaluating the ecosystem C benefits of bioenergy production.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: NONE; SC0018420

OSTI ID:: 1839453

Journal Information:: Global Change Biology. Bioenergy, Journal Name: Global Change Biology. Bioenergy Journal Issue: 3 Vol. 14; ISSN 1757-1693

Publisher:: Wiley-BlackwellCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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