Articles
MEASUREMENT AND MODELLING THE TRANSPIRATION OF FRUIT TREES AND GRAPEVINES FOR IRRIGATION SCHEDULING
Article number
792_37
Pages
321 – 332
Language
English
Abstract
The goal of sustainable irrigation is to use water parsimoniously and wisely.
This means identifying how much water plants are using, and deciding ‘when’ and ‘how much’ irrigation is needed to meet their water demands.
Water-stress can affect productivity once the soil dries below a given matric potential.
Identifying this ‘stress point’ will help managers to use their water wisely.
A series of field experiments, with modelling at the leaf, whole-plant and vineyard scale, are used here to quantify transpiration losses from grapevines.
Lysimeter data are used to examine the vines’ response to soil drying.
New data are presented to illustrate that direct measurement of sap flow and the use of computer modelling are complementary tools to quantify the degree and timing of water stress.
This means identifying how much water plants are using, and deciding ‘when’ and ‘how much’ irrigation is needed to meet their water demands.
Water-stress can affect productivity once the soil dries below a given matric potential.
Identifying this ‘stress point’ will help managers to use their water wisely.
A series of field experiments, with modelling at the leaf, whole-plant and vineyard scale, are used here to quantify transpiration losses from grapevines.
Lysimeter data are used to examine the vines’ response to soil drying.
New data are presented to illustrate that direct measurement of sap flow and the use of computer modelling are complementary tools to quantify the degree and timing of water stress.
Authors
S.R. Green
Keywords
heat-pulse measurement, sap flow, lysimetry, time domain reflectometry, water stress
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