Plant biostimulants - Preparation of sample for microbial analysis

This document defines general rules for the aerobic preparation of the initial suspension and of dilutions for microbiological examinations of microbial plant biostimulants.
This horizontal method might not be appropriate in very detail for certain products. In this case, different methods which are specific to these products can be used if necessary, for justified technical reasons.

Pflanzen-Biostimulanzien - Probenvorbereitung für die mikrobielle Analyse

Dieses Dokument legt allgemeine Regeln für die aerobe Herstellung von Erstverdünnungen und Verdünnungen für mikrobiologische Untersuchungen von mikrobiellen Pflanzen-Biostimulanzien fest.
Dieses horizontale Verfahren ist für bestimmte Produkte nicht unbedingt bis ins Detail geeignet. In diesem Fall können andere Verfahren, die speziell auf diese Produkte zutreffen, angewendet werden, wenn dies aus gerechtfertigten technischen Gründen notwendig ist.

Biostimulants des végétaux - Préparation de l'échantillon pour l'analyse microbienne

Le présent document définit les règles générales pour la préparation aérobie de la suspension mère et des dilutions en vue de l’examen microbiologique des biostimulants microbiens des végétaux.
Cette méthode horizontale pourrait ne pas être appropriée dans le détail pour certains produits. Dans ce cas, des méthodes différentes, spécifiques à ces produits, peuvent être utilisées si cela s’avère nécessaire pour des raisons techniques justifiées.

Rastlinski biostimulanti - Priprava vzorcev za mikrobiološko analizo

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Standards Content (Sample)

oSIST prEN 17708:2023
Rastlinski biostimulanti - Priprava vzorcev za mikrobiološko analizo
Plant biostimulants - Preparation of sample for microbial analysis
Pflanzen-Biostimulanzien - Probenvorbereitung für die mikrobielle Analyse
Biostimulants des végétaux - Préparation de l'échantillon pour l'analyse microbienne
Ta slovenski standard je istoveten z: prEN 17708
65.080 Gnojila Fertilizers
oSIST prEN 17708:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17708:2023

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oSIST prEN 17708:2023

prEN 17708


April 2023
ICS 65.080 Will supersede CEN/TS 17708:2022
English Version

Plant biostimulants - Preparation of sample for microbial
Biostimulants des végétaux - Préparation de Pflanzen-Biostimulanzien - Probenvorbereitung für die
l'échantillon pour l'analyse microbienne mikrobielle Analyse
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 455.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.



CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17708:2023 E
worldwide for CEN national Members.

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oSIST prEN 17708:2023
prEN 17708:2023 (E)
Contents Page
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Principle . 8
5 Diluents . 8
6 Apparatus . 8
7 Sampling and storage . 9
8 Preparation of samples and suspensions . 10
8.1 Protocol for enumeration of beneficial microorganisms . 10
8.1.1 General . 10
8.1.2 Liquid - water based - formulations . 10
8.1.3 Liquid - oil based (emulsifiable concentrate - EC) formulations . 10
8.1.4 Solid - wettable powder (WP) formulations .

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