NDLI: Evaluation of Sweet Sorghum and Sorghum × Sudangrass Hybrids as Feedstocks for Ethanol Production

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Evaluation of Sweet Sorghum and Sorghum × Sudangrass Hybrids as Feedstocks for Ethanol Production

Content Provider	Springer Nature Link
Author	Tew, Thomas L. Cobill, Robert M. Richard, Edward P.
Copyright Year	2008
Abstract	Field studies were conducted at the USDA-ARS Sugarcane Research Laboratory in southeast Louisiana to evaluate the ethanol yield potential of five sweet sorghums (Dale, M81-E, Rio, Theis, and Topper) and two non-flowering sorghum × sudangrass forage hybrids (MMR 333/27 and MMR 333/47). The sorghums were planted in the spring and harvested at 85, 101, 119, and 138 days after planting (DAP). Theoretical sugar-based ethanol yield increased for the sweet sorghums (except Rio) from 85 through 119 days, but did not significantly increase further at 138 days. The forage sorghums did not show a similar increase, though the theoretical sugar-based ethanol yield of MMR 333/47 at 138 DAP was greater than at 85 DAP. Conversely, theoretical fiber-based ethanol yields increased two-fold in the two forage sorghums from 85 to 138 DAP; a significant increase in fiber-based ethanol yield was not observed in any of the sweet sorghums over the same period. At 138 DAP, sugar-based ethanol yield of Theis (6,060 L ha$^{−1}$), was greater than that of Rio or either of the two forage hybrids. Fiber-based ethanol yield of MMR 333/47 (8,860 L ha$^{−1}$) was greater than that of any other variety in the test. Theoretical ethanol yield from hexose sugar and fiber components averaged across varieties was 6,500, 7,720, 9,100, and 10,810 L ha$^{−1}$ at 85, 101, 119 and 138 DAP, respectively. As a complementary crop for Louisiana’s sugarcane growers, sorghum would need to be harvested not later than 120 DAP so as to not interfere with the planting of sugarcane in these fields. Both Theis and MMR 333/47 produced greater than 11,000 L ha$^{−1}$ combined theoretical ethanol at 119 DAP, Theis, equally from sugar and fiber, MMR 333/47 about two-thirds from fiber. Choice of sorghum type would depend on the conversion process(s) being used at the biorefinery.
Starting Page	147
Ending Page	152
Page Count	6
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	1
Issue Number	2
e-ISSN	19391242
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-07-30
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioenergy Complementary crop Days-after-planting Sugarcane Saccharum spp Sorghum bicolor Wood Science & Technology Plant Ecology Plant Breeding/Biotechnology Plant Genetics & Genomics Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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