David R. Coyle^a, Mark D. Coleman^a, Jaclin A. Durant^b,c, Lee A. Newman^b,d

^aUSDA Forest Service, Southern Research Station, P.O. Box 700, New Ellenton, SC 29809, USA

^bArnold School of Public Health, Department of Environmental Health Sciences, University of South Carolina, 800 Sumter Street, Columbia, SC 29208, USA

^cDepartment of Entomology, University of California-Riverside, Riverside, CA 92521, USA+

^dUniversity of Georgia Savannah River Ecology Laboratory, Drawer E, Aiken, SC 29802, USA

Abstract
Populus species and hybrids have many practical applications, but clonal performance is relatively undocumented in the southeastern United States outside of the Mississippi River alluvial floodplain. In spring 2001, 31 Populus clones were planted on two sites in South Carolina, USA. The sandy, upland site received irrigation and fertilization throughout the growing season, while the bottomland site received granular fertilizer yearly and irrigation in the first two years only. Over three growing seasons, tree survival and growth differed significantly among clones at both sites. Hybrid clones I45/51, Eridano, and NM6 had very high survival at both sites, while pure eastern cottonwood (P. deltoides) clones consistently had the lowest survival. Nearly all mortality occurred during the first year. The P. deltoids clone WV416 grew well at both sites, P. deltoides clones S13C20 and Kentucky 8 grew well at the bottomland site, and hybrids 184-411
and 52-225 grew well at the upland site. Based on both survival and growth, clones 311-93, S7C15, 184-411, and WV416 may warrant additional testing in the upper coastal plain region of the southeastern US. Kentucky 8 and S13C20 had excellent growth rates, but initial survival was low. However, this was likely due to planting stock quality. We emphasize this is preliminary information, and that clones should be followed through an entire rotation before large-scale deployment.

Keywords: Cottonwood; Diameter; Hybrid; Irrigation; Stem volume

Corresponding author
Current address: Department of Entomology,345 Russell Laboratories, University of Wisconsin, Madison, WI 53706, USA.
Tel.: +1608 262 4755
Fax: +1608 262 3322
E-mail address: dcoyle@entomology.wisc.edu (D.R. Coyle)

SREL Reprint #3011

Coyle, D. R., M. D. Coleman, J. A. Durant and L. A. Newman. 2006. Survival and growth of 31 Populus clones in South Carolina. Biomass and Bioenergy 30:750-758.

To request a reprint