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Approximately 15% of Miscanthus yield is lost at current commercial cutting heights in Iowa

Journal Article · · Agrosystems, Geosciences & Environment
DOI:https://doi.org/10.1002/agg2.70039· OSTI ID:2510505
 [1];  [2];  [3];  [2];  [1]
  1. Iowa State University, Ames, IA (United States); Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
  2. Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States); University of Illinois at Urbana‐Champaign, IL (United States)
  3. Iowa State University, Ames, IA (United States)

Various works have quantitatively characterized the effects of environmental and management factors on Miscanthus x giganteus Greef et Deu (mxg) yield and, therefore, anticipated land requirement per unit production. However, little work has addressed the effects of cutting height, which may significantly contribute to the difference between the standing aboveground biomass at harvest (i.e., biological yield) and harvested yield. This study quantitatively characterized the effect of cutting height using a replicated nitrogen trial of a 5-year-old mxg stand in southeast Iowa and related this information to observations of cutting height in nearby commercial fields. Nitrogen fertilizer did not significantly change the relationship of the stem segment mass to length, and overall, a 1-cm stem segment contributes 0.5% of the total stem biomass within the bottom 44 cm of the stem. This results in an average harvest loss of 15% of the aboveground standing biomass when cutting at 30 cm, typically seen in commercial mxg fields in eastern Iowa. Cutting height should be considered when accurately predicting commercial mxg harvest yields and changes in soil organic carbon in a commercial mxg agroecosystem.

Research Organization:
Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE
Grant/Contract Number:
SC0018420
OSTI ID:
2510505
Alternate ID(s):
OSTI ID: 2510997
Journal Information:
Agrosystems, Geosciences & Environment, Vol. 8, Issue 1; ISSN 2639-6696
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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