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The Center for Native Grasslands Management

Title: Managing Eastern Gamagrass as a bioenery crop in the Southeast
Year: 2002
Author(s): Edwards, S. D., Douglas, J. L.
Source Title: Proceedings of the Third Eastern Native Grass Symposium
Source Type: Proceedings
pages: 276
Original Publication:  
Abstract: Eastern gamagrass is a native warm season perennial grass capable of producing high yields with low nitrogen fertilizer applications. A three-year field study is being conducted at Coffeeville, MS to evaluate biomass production of eastern gamagrass as a potential bioenergy crop for the southeastern US under a one and two cut harvest system. Dry matter production and chemical composition were collected from a four-year-old stand of eastern gamagrass. Nitrogen fertilizer was applied in April 2000-2001 at 134 kg/ha-1 for the one cut and split (67 kg/ha-1) in April and June 2000-2001 for the two-cut. A one cut was made 14 September 2000 and 8 August 2001. A two cut was made 13 June and 14 September 2000, and 18 June and 12 September 2001. In 2000 and 2001, a one cut produced 8,700 and 13,889 kg/ha-1, respectively and the sum of the two harvests in 2000 and 2001 for the two cut was 14,810 and 14,649 kg/ha -1 DM, respectively. The difference in DM production between years for a one cut was harvest date. It appears eastern gamagrass produces peak biomass at seed maturity and production declines rapidly thereafter. Percent ash and N did not vary between years and was not affected by harvest system. Percent ash and N for the one cut was 4.2 and 0.8, respectively, and the average percent ash as a biomass energy crop and that a one cut harvest made at seed maturity maximizes biomass production and percent ash and N.
Publisher: The North Carolina Botanical Garden, Chapel Hill, NC, October 1-3, 2002. Omnipress, Madison, WI
Editor(s): J. Randall