||Rate of Increase Among Native Warm-Season Grasses Using Conventional
and No-Till Technology with Application of Imazapic Herbicide
|| Jones, B. C., Gruchy, J. P., Harper, C. A.
||Proceedings of the 4th Eastern Native Grass Symposium
||Native warm-season grasses (NWSG) are used to enhance habitat for numerous wildlife species. Over time, habitat quality declines as grass density increases. Of particular concern has been the rate of increase by switchgrass; however, there are no data that compare rate of increase by switchgrass with other species. Plots of NWSG were established in middle Tennessee in 1999 to examine establishment methods, including combinations of conventional tillage, no-till, and
application of imazapic herbicide. Density (seedlings/m2) of big bluestem (Andropogon gerardii), little bluestem (Schizachyrium scoparium), indiangrass (Sorghastrum nutans), and switchgrass (Panicum virgatum) was measured each April 2001-2004. Rate of increase did not differ among species and treatments. Mean density among species differed within treatments in 2004. Our data support the contention that management practices are necessary to maintain
quality habitat when any of these four NWSG are used. Practices including fire during the late growing season, mowing followed by discing, and/or strip herbicide applications should help
maintain desirable structure and composition in NWSG stands.
||The University of Kentucky Department of Forestry, Lexington, Kentucky
||T. G. Barnes