ISHS Acta Horticulturae 351: III International Congress on Hazelnut
WATER RELATIONS IN HAZELNUT: SAP FLOW, PREDAWN WATER POTENTIAL AND MICROMORPHOMETRIC VARIATIONS OF STEM DIAMETER |
| Authors: | T. Amégllo, M. Mingeau, P. Archer, B. Pons |
| Abstract:
The evaluation of transpiration is an essential element in order to understand plant water behaviour, and to optimize irrigation and water management. The micrometeorological methods used to calculate the evapotranspiration are well adapted for crops like corn, but they are not so reliable for trees. Water stress indicators are a best way for optimizing irrigation. In this paper, we describe a method recently developed for measuring sap flow in the stem of tree which evaluates water consumption in fruit trees more acurately than with climatic approaches. It can be used under unlimited or limited water supply conditions. Two other plant water stress indicators (diurnal stem contractions and predawn water potential) are also tested for irrigation scheduling. We present here the first results obtained in hazelnut experiments. | |
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