A STUDY ON EVAPO-TRANSPIRATION AND SOIL MOISTURE MOVEMENT CONSIDERING PLANT GROWTH AND SAP FLOW

Abstract

In order to investigate the water balance, rainfall infiltration, runoff, evapo-transpiration during plants growth, hydrological observations have been carried on using weighing lysimeter under the conditions of planted crops. Soil moisture content and sap flow of plants are measured using Amplitude Domain Reflectrometry (ADR) probe and stem heat balance method (SHB), respectively. Leaf area and dry weight as the index of plant growth is measured, periodically. This paper describes the water balance and the evapo-transpiration based on these observed results and the results of vertical two-dimensional analysis of soil moisture movement considering the changes in the evapo-transpiration during the plant growth.