Titre :
|
Electrical conductivity test
|
Auteurs :
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A. Sorensen ;
E. Lauridsen ;
K. Thomsen
|
Type de document :
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rapport
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Editeur :
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Humlebaek, DNK : Danida forest seed centre, 1996
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Collection :
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Technical note n° 45
|
ISBN/ISSN/EAN :
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0902-3224
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Format :
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19 p.
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Langues:
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= Anglais
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Catégories :
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Matériel végétal, techniques de production, pépinière
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Mots-clés:
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GRAINE
;
SEMENCE
;
ESSAI
;
VIGUEUR
;
CONDUCTIVITE ELECTRIQUE
;
ARBRE FORESTIER
;
GERMINATION
|
Résumé :
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Measurement of electrical conductivity of leak water from imbibing tree seeds can be used as a vigour test. A standardized test can provide estimates of seed quality in 24 hours, which can be used as a supplement or a quick alternative to a germination test. Conductivity measurements can also be a useful tool in research into e.g. desiccation tolerance. The test has so far only been standardized for a few agricultural species although used in research on a large number of species including tree seeds. It should be stressed that standardization for routine testing is very time consuming. This Technical Note gives practical guidelines on the application and standardization of the test, and it provides the necessary background for evaluating the relevance of the test in different situations. Chapter 2 is a short introduction to "why" and "what" seeds leak. The principles behind conductivity measurements and the equipment needed for the test are described in chapter 3. Chapter 4 goes through the actual procedures, step by step, and in chapter 5 the different factors that may affect conductivity are in focus. Instructions on how to standardize the test for new species are given in chapter 6, and finally, in chapter 7 the general applicability of the test is discussed.
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