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Title: A multi-product landscape life-cycle assessment approach for evaluating local climate mitigation potential

Abstract

Increasing demand for land-based climate mitigation requires more efficient management of agricultural landscapes for competing objectives. Here we develop methods for assessing trade-offs and synergies between intensification and carbon-sequestering conservation measures in annual crop production landscapes using the DayCent ecosystem model and the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies (GREET) life-cycle assessment (LCA) model. We compiled county-scaled crop yields, fertilizer application rates, and tillage intensity for a corn-soybean farming case study landscape in the US state of Iowa. Using DayCent, we estimated a baseline soil organic carbon (SOC) accrual rate of 0.29 Mg C ha- 1 y-1 driven by historical increases in crop productivity and reductions in tillage intensity. We then simulated the effects of management interventions targeted toward intensification (stover removal) and SOC sequestration (tillage intensity reduction and winter cover crop addition) individually and in combination. We propose a new multi-product landscape-LCA approach that analyzes marginal changes in corn grain, corn stover, and soybean production from the landscape in terms of their value for biofuel production (corn ethanol, soy biodiesel, and cellulosic ethanol from stover) and associated net displacement of conventional fossil-derived fuel use. This enables us to evaluate both intensification and sequestration effects in commonmore » CO2-equivalent mitigation units. We also used DayCentsimulated yields under the different land management scenarios to estimate farm-level costs and revenues. Our results show that intensification via collecting 30% of corn stover for biofuel production would increase the total greenhouse gas (GHG) mitigation potential of this landscape by 0.93 Mg CO2e ha- 1 y-1 and provide $49 ha- 1 y-1 of additional net revenue from biomass sales, but would reduce the baseline SOC accumulation rate by approximately 40%. In contrast, integrated approaches that include co-adoption of winter cover cropping and/or tillage intensity reduction would result in increased rates of SOC accumulation above the baseline, achieving simultaneous improvements in both farm profits and the overall GHG mitigation potential of the landscape.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3];  [4];
  1. Queenslanbd Univ. of Technology, Brisbane (Australia); Colorado State Univ., Fort Collins, CO (United States)
  2. Colorado State Univ., Fort Collins, CO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Colorado State Univ., Fort Collins, CO (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); United States Department of Agriculture (USDA)
OSTI Identifier:
1866662
Alternate Identifier(s):
OSTI ID: 1880240
Grant/Contract Number:  
AC05-00OR22725; AC02-06CH11357; 2017-67019-26327
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cleaner Production
Additional Journal Information:
Journal Volume: 354; Journal Issue: NA; Journal ID: ISSN 0959-6526
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; life cycle assessment; sustainable intensification; soil carbon; biofuels; landscape design; mitigation costs; Climate Mitigation; Greenhouse Gas Emissions; Life-cycle analysis; Natural Solution

Citation Formats

Nguyen, Trung H., Field, John L., Kwon, Hoyoung, Hawkins, Troy R., Paustian, Keith, and Wang, Michael Q. A multi-product landscape life-cycle assessment approach for evaluating local climate mitigation potential. United States: N. p., 2022. Web. doi:10.1016/j.jclepro.2022.131691.
Nguyen, Trung H., Field, John L., Kwon, Hoyoung, Hawkins, Troy R., Paustian, Keith, & Wang, Michael Q. A multi-product landscape life-cycle assessment approach for evaluating local climate mitigation potential. United States. https://doi.org/10.1016/j.jclepro.2022.131691
Nguyen, Trung H., Field, John L., Kwon, Hoyoung, Hawkins, Troy R., Paustian, Keith, and Wang, Michael Q. Sat . "A multi-product landscape life-cycle assessment approach for evaluating local climate mitigation potential". United States. https://doi.org/10.1016/j.jclepro.2022.131691. https://www.osti.gov/servlets/purl/1866662.
@article{osti_1866662,
title = {A multi-product landscape life-cycle assessment approach for evaluating local climate mitigation potential},
author = {Nguyen, Trung H. and Field, John L. and Kwon, Hoyoung and Hawkins, Troy R. and Paustian, Keith and Wang, Michael Q.},
abstractNote = {Increasing demand for land-based climate mitigation requires more efficient management of agricultural landscapes for competing objectives. Here we develop methods for assessing trade-offs and synergies between intensification and carbon-sequestering conservation measures in annual crop production landscapes using the DayCent ecosystem model and the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies (GREET) life-cycle assessment (LCA) model. We compiled county-scaled crop yields, fertilizer application rates, and tillage intensity for a corn-soybean farming case study landscape in the US state of Iowa. Using DayCent, we estimated a baseline soil organic carbon (SOC) accrual rate of 0.29 Mg C ha- 1 y-1 driven by historical increases in crop productivity and reductions in tillage intensity. We then simulated the effects of management interventions targeted toward intensification (stover removal) and SOC sequestration (tillage intensity reduction and winter cover crop addition) individually and in combination. We propose a new multi-product landscape-LCA approach that analyzes marginal changes in corn grain, corn stover, and soybean production from the landscape in terms of their value for biofuel production (corn ethanol, soy biodiesel, and cellulosic ethanol from stover) and associated net displacement of conventional fossil-derived fuel use. This enables us to evaluate both intensification and sequestration effects in common CO2-equivalent mitigation units. We also used DayCentsimulated yields under the different land management scenarios to estimate farm-level costs and revenues. Our results show that intensification via collecting 30% of corn stover for biofuel production would increase the total greenhouse gas (GHG) mitigation potential of this landscape by 0.93 Mg CO2e ha- 1 y-1 and provide $49 ha- 1 y-1 of additional net revenue from biomass sales, but would reduce the baseline SOC accumulation rate by approximately 40%. In contrast, integrated approaches that include co-adoption of winter cover cropping and/or tillage intensity reduction would result in increased rates of SOC accumulation above the baseline, achieving simultaneous improvements in both farm profits and the overall GHG mitigation potential of the landscape.},
doi = {10.1016/j.jclepro.2022.131691},
journal = {Journal of Cleaner Production},
number = NA,
volume = 354,
place = {United States},
year = {Sat Apr 09 00:00:00 EDT 2022},
month = {Sat Apr 09 00:00:00 EDT 2022}
}

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