University of Hertfordshire

  • Aiming Qi
  • Yuanzhi Ni
  • Onesmus N. Mwabonje
  • Goetz M. Richter
  • Kenny Yeung
  • Martin Pate
  • Jeremy Woods
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Original languageEnglish
Number of pages14
Pages (from-to)568-581
JournalBiofuels, Bioproducts and Biorefining
Journal publication date1 May 2019
Volume13
Issue3
Early online date9 Jan 2019
DOIs
Publication statusPublished - 1 May 2019

Abstract

Feedstocks from lignocellulosic biomass (LCB) include crop residues and dedicated per¬ennial biomass crops. The latter are often considered superior in terms of climate change mitigation potential. Uncertainty remains over their availability as feedstocks for biomass provision and the net greenhouse gas emissions (GHG) during crop production. Our objective was to assess the optimal land allocation to wheat and Miscanthus in a specific case study located in England, to increase bio¬mass availability, improve the carbon balance (and reduce the consequent GHG emissions), and mini¬mally constrain grain production losses from wheat. Using soil and climate variables for a catchment in east England, biomass yields and direct nitrogen emissions were simulated with validated process-based models. A ‘Field to up-stream factory gate’ life-cycle assessment was conducted to estimate indirect management-related GHG emissions. Results show that feedstock supply from wheat straw can be supplemented beneficially with LCB from Miscanthus grown on selected low-quality soils. In our study, 8% of the less productive arable land area was dedicated to Miscanthus, increasing total LCB provision by about 150%, with a 52% reduction in GHG emission per ton LCB delivered and only a minor effect on wheat grain production (−3%). In conclusion, even without considering the likely carbon sequestration in impoverished soils, agriculture should embrace the opportunities to provide the bioeconomy with LCB from dedicated, perennial crops.

Notes

© 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

ID: 16162190