POTENCIALS OF SAP FLOW EVALUATION BY MEANS OF ACOUSTIC EMISSION MEASUREMENTS

POTENCIALS OF SAP FLOW EVALUATION BY MEANS OF ACOUSTIC EMISSION MEASUREMENTS

journal article - other

en

The work deals with measurement techniques of water conducting system in the trees. Water conducting system (including xylem and phloem) indicates its importance for related physiological processes. There are still problems how to measure its functioning (which variables and how), especially in the open fi eld (e.g., forests and orchards) in order to get maximum information about it.There exist also other physical variables carrying important information, which can be measured using diff erent principles. This includes e.g., acoustic methods, which can detect quantitative variation of pulses occurring during cavitation events, associated with interruptions of water columns in vessels. This must not necessarily be a single source of acoustic emissions. In this study we are focused on a general description of acoustic events measurable in a wide range of their spectrum. The fi rst aim was to detect such signals and the second to learn them and gradually analyze in order to better understand the associated processes causing their occurrence and their relations to plant life.

V příspěvku jsou uvedeny postupy měření výživových parametrů stromů – sap flow. Autoři představují výsledky experimentů realizovaných v této oblasti pomocí metody akustické emise.

The work deals with measurement techniques of water conducting system in the trees. Water conducting system (including xylem and phloem) indicates its importance for related physiological processes. There are still problems how to measure its functioning (which variables and how), especially in the open fi eld (e.g., forests and orchards) in order to get maximum information about it.There exist also other physical variables carrying important information, which can be measured using diff erent principles. This includes e.g., acoustic methods, which can detect quantitative variation of pulses occurring during cavitation events, associated with interruptions of water columns in vessels. This must not necessarily be a single source of acoustic emissions. In this study we are focused on a general description of acoustic events measurable in a wide range of their spectrum. The fi rst aim was to detect such signals and the second to learn them and gradually analyze in order to better understand the associated processes causing their occurrence and their relations to plant life.

akustická emise, sap flow, vlnovod, výžíva stromů

acoustic emission, AE, sap flow, waveguide

2011

30.11.2011

Mendelova univerzita

Brno

1211-8516

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis

59

6

1–6

6