Skip to main content

Evaluation of the Tritiated Water Method for Measurement of Transpiration in Young Pinus taeda L.

The full text article is temporarily unavailable.

We apologise for the inconvenience. Please try again later.

The tritiated water (HTO) technique was evaluated as a method for measurement of transpiration of young loblolly pine. Twenty-one millicuries of tritium in 3 ml of water were injected into holes drilled at the base of the trees. The transpiration rate was estimated to average 8.3 liters/day per tree for three trees injected in February and 40.4 liters/day for a single tree injected in July. Several methods of collecting the water from the trees for tritium analysis were evaluated. The collection of water by condensation in clear plastic bags sealed around branch tips proved to be a simple, reliable method of collecting water. Differences in the integral tritium activity with distance from the injection site were found. Serious errors in the estimation of transpiration are possible if the difference in tritium activity in the canopy are not taken into account. The activity measured in the water collected nearest the injection point provided good estimation of transpiration when compared to evaporation determined by a soil water balance or by the Penman-Monteith evaporation formula. Forest Sci. 28:5-16.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: Evapotranspiration; HTO; exchange; tracer

Document Type: Journal Article

Affiliations: Savannah River Laboratory, E. I. du Pont de Nemours and Company, Aiken, SC 29801

Publication date: 01 March 1982

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more