70 Transpiration and Root Water Uptake
Part 6. Soils
Published Online: 15 APR 2006
Copyright © 2005 John Wiley & Sons, Ltd
Encyclopedia of Hydrological Sciences
How to Cite
de Willigen, P., Heinen, M. and Kirkham, M. B. 2006. Transpiration and Root Water Uptake. Encyclopedia of Hydrological Sciences. 6:70.
- Published Online: 15 APR 2006
Root water uptake is one of the major components of the water balance of a soil. In this article, both the physical as well as the physiological aspects of root water uptake and transpiration are dealt with. The regulation of transpiration by different mechanisms on different levels (e.g. through hormones, adaptation of vessel diameter, root radius, and vertical extension of the root system) is discussed. Attention is paid to the modeling of water uptake by single roots and root systems. The last section deals with the different techniques used to measure root water uptake, for example, lysimeter, sap flow, inverse modeling, and discusses the advantages and disadvantages of the different methods.
- hydraulic lift;
- sap flow;
- methods of measurement;
- hydraulic head;