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The Center for Native Grasslands Management

Title: Eastern Gamagrass grown in sunlit controlled environmental chambers at two levels of carbon dioxide and three temperatures
Year: 2002
Author(s): Ritchie, J. C., Gitz, D. C., Krizek, D. T., Reddy, V. R.
Source Title: Proceedings of the Third Eastern Native Grass Symposium
Source Type: Proceedings
pages: 308
Original Publication:  
Abstract: Eastern gamagrass was grown in six soil plant atmosphere research (SPAR) sunlit controlled-environmental chambers (0.5 x 2 m, 16 plants per chamber) at two levels of carbon dioxide (370 and 740 ppm) and three temperatures (20/14, 27.5/21.5, and 35/29 C day/night) for twenty weeks (mid-May to mid-October 2001). Shoots (tillers taller than 10 cm) were harvested at 10 and 15 weeks and total plants (roots, crowns, shoots) were harvested at 20 weeks. Biomass of shoots, crowns, and roots increased significantly with increased temperature. Biomass was consistently higher in chambers with increased carbon dioxide. Biomass allocation differed with treatment with percent roots by weight being highest with high carbon dioxide and low temperature treatment. Percent roots by weight decreased with increasing temperature. Our results suggest little effect on growth for a single growing season at increased carbon dioxide. However, the consistently higher biomass at higher carbon dioxide treatments suggests the potential for cumulative effects over time.
Publisher: The North Carolina Botanical Garden, Chapel Hill, NC, October 1-3, 2002. Omnipress, Madison, WI
Editor(s): J. Randall