Skip to Main Content
Leaf water relations and sapflow in eastern cottonwood (Populus deltoides Bartr.) trees planted for phytoremediation of a groundwater pollutantAuthor(s): James M. Vose; Wayne T. Swank; Gregory J. Harvey; Barton D. Clinton; Christine Sobek
Source: International Journal of Phytoremediation. 2(1): 53-73.
Publication Series: Miscellaneous Publication
PDF: View PDF (363 KB)
DescriptionPlants that remediate groundwater pollutants may offer a feasible alternative to the traditional and more expensive practices. Because its success depends on water use, this approach requires a complete understanding of species-specific transpiration patterns. The objectives of this study were (1) to quantify tree and stand-level transpiration in two age classes (whips and 1-year-old seedlings) of eastern cottonwoods (Populus deltoides Bartr.), and (2) to determine climatic and physiological driving variables at the Carswell Air Force Base in central Texas, USA. Trichloroethylene (TCE) was detected in shallow (2 to 3 m) groundwater in the early 1980’s. Cottonwood whips and 1-year-old potted seedlings were planted in two separate 0.15-ha plantations in spring 1996. Sapflow gauges determined sapflow on 14 to 16 trees in May, June, July, August, and October 1997. Without adjusting for differences in tree size, sapflow rates were greater for 1-year-old trees than whips (peak values were 0.75 and 0.53 kg hr-1 tree-1, respectively). When adjusted for tree size, the pattern reversed, with whips having significantly greater sapflow rates than 1-year-old trees (peak values were 0.053 and 0.045 kg cm-2 hr-1, respectively). Temporal variation (diurnal and seasonal) in sapflow rates was principally related to VPD [vapor pressure deficit], solar radiation, and leaf conductance. Extrapolating to the stand and across the growing season, the plantations transpired ~25 cm of water. Early attainment of high levels of transpiration indicates that the stands will transpire considerably more water as leaf area and root exploitation increases with stand development.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationVose, James M.; Swank, Wayne T.; Harvey, Gregory J.; Clinton, Barton D.; Sobek, Christine. 2000. Leaf water relations and sapflow in eastern cottonwood (Populus deltoides Bartr.) trees planted for phytoremediation of a groundwater pollutant. International Journal of Phytoremediation. 2(1): 53-73.
- Inheritance of compartmentalization of wounds in sweetgum (Liquidambar styraciflua L.) and eastern cottonwood (Populus deltoides Bartr.)
- Economics of Afforestation with Eastern Cottonwood (Populus Deltoides) of Agricultural Land in the Lower Mississippi Alluvial Valley
- Effects of light regime and IBA concentration on adventitious rooting of an eastern cottonwood (Populus deltoides) clone
XML: View XML