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The Center for Native Grasslands Management

Title: Organic matter dynamics under long-term switchgrass and tall fescue sites in the upper southeastern U. S
Year: 2002
Author(s): Fike, J. H., Smith, S. R., Parrish, D. J., Wolf, D. D., Garten, Jr., C. T.
Source Title: Proceedings of the Third Eastern Native Grass Symposium
Source Type: Proceedings
pages: 53-55
Original Publication:  
Abstract: The fate of carbon in agro-ecosystems has garnered increasing attention due to concerns over global warming. Switchgrass plots were planted at eight locations across five upper-tier southeastern states in 1992 and maintained with one- or two-cut management systems for 10 yr. Comparisons of soil organic matter were made among soil samples taken from switchgrass (cv Alamo) plots and good stands of tall fescue (cv KY-31) in adjacent borders. Soil samples were collected to 10-cm depth in 1996 and 2001 as well aas to the bottom of the Ap horizon in 1992 and 2001 (from 10 to 30 cm depth, depending on site). Percent OM was determined used the Walkley/Black method. From 1992 to 2001, with one-cut management, soil OM concentration increased about 50% in the Ap horizon of switchgrass plots when averaged across all sites. The upper 30 cm of the soil profile contained the majority (68%) of switchgrass roots. There was little difference in soil OM between switchgrass and tall fescue in the upper 10 cm of the soil profile in 1996 and 2001.
Publisher: The North Carolina Botanical Garden, Chapel Hill, NC, October 1-3, 2002. Omnipress, Madison, WI
Editor(s): J. Randall