Vertical Distribution of Structural Components in Corn Stover

Agriculture

Jane M. F. Johnson⁷  Douglas L. Karlen¹⁰  Garold L. Gresham¹²  Keri B. Cantrell⁴  David W. Archer⁵  Brian J. Wienhold¹  Gary E. Varvel¹  David A. Laird⁶  John Baker⁹  Tyson E. Ochsner¹¹  Jeff M. Novak⁴  Ardell D. Halvorson^2,7  Francisco Arriaga^7,8  David T. Lightle^3,7  Amber Hoover¹²  Rachel Emerson¹²  Nancy W. Barbour⁷ 

[1] USDA-Agricultural Research Service, Agroecosystem Management Research Unit, 117 Keim Hall, Lincoln, NE 68583, USA; E-Mails:;USDA-Agricultural Research Service, 2150 Centre Ave., Bldg. D. Suite 100, Fort Collins, CO 80526, USA; E-Mail:;CPESC #651, 105 Meadow Lane, Labadie, MO 63055, USA; E-Mail:;USDA-Agricultural Research Service, Coastal Plains Research Center, 2611 W. Lucas St., Florence, SC 29501, USA; E-Mails:;USDA-Agricultural Research Service, Northern Great Plains Research Laboratory, P.O. Box 459, Mandan, ND 58554, USA; E-Mail:;Department of Agronomy, Iowa State University, 2104 Agronomy Hall, Ames, IA 50011, USA; E-Mail:;USDA-Agricultural Research Service, North Central Soil Conservation Research Laboratory, 803 Iowa Avenue, Morris, MN 56267, USA; E-Mail:;Department of Soil Science, University of Wisconsin, 1525 Observatory Drive, Madison, WI 53706-1299, USA; E-Mail:;USDA-Agricultural Research Service, Soil and Water Management Research Unit, 439 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, MN 55108, USA; E-Mail:;USDA-Agricultural Research Service, National Laboratory for Agriculture and the Environment, 2110 University Boulevard, Ames, IA 50011, USA; E-Mail:;Department of Plant and Soil Sciences, Oklahoma State University, 368 Agricultural Hall, Stillwater, OK 74078-6028, USA; E-Mail:;US-Department of Energy, Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID 83415-2025, USA; E-Mails:

关键词: lignocellulosic biomass;    theoretical ethanol yield;    soil organic carbon;    sustainable;    bioenergy;    second generation feedstock;   

DOI  :  10.3390/agriculture4040274

来源: mdpi

【 摘 要 】

In the United States, corn (Zea mays L.) stover has been targeted for second generation fuel production and other bio-products. Our objective was to characterize sugar and structural composition as a function of vertical distribution of corn stover (leaves and stalk) that was sampled at physiological maturity and about three weeks later from multiple USA locations. A small subset of samples was assessed for thermochemical composition. Concentrations of lignin, glucan, and xylan were about 10% greater at grain harvest than at physiological maturity, but harvestable biomass was about 25% less due to stalk breakage. Gross heating density above the ear averaged 16.3 ± 0.40 MJ kg⁻¹, but with an alkalinity measure of 0.83 g MJ⁻¹, slagging is likely to occur during gasification. Assuming a stover harvest height of 10 cm, the estimated ethanol yield would be >2500 L ha⁻¹, but it would be only 1000 L ha⁻¹ if stover harvest was restricted to the material from above the primary ear. Vertical composition of corn stover is relatively uniform; thus, decision on cutting height may be driven by agronomic, economic and environmental considerations.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.