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.
Il se peut que cette méthode horizontale ne soit pas appropriée 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

Ta dokument določa splošna pravila za aerobno pripravo osnovne suspenzije in razredčin za mikrobiološke preiskave mikrobnih rastlinskih biostimulantov.
Ta vodoravna metoda v nekaterih podrobnostih morda ne bo primerna za nekatere izdelke. V tem primeru se lahko po potrebi iz upravičenih tehničnih razlogov uporabijo metode, ki so specifične za te izdelke.

General Information

Publication Date
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
Due Date
Completion Date


Buy Standard

Technical specification
TS CEN/TS 17708:2023
English language
17 pages
sale 10% off
sale 10% off
e-Library read for
1 day

Standards Content (Sample)

SIST-TS CEN/TS 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: CEN/TS 17708:2022
65.080 Gnojila Fertilizers
SIST-TS CEN/TS 17708:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST-TS CEN/TS 17708:2023

---------------------- Page: 2 ----------------------
SIST-TS CEN/TS 17708:2023

CEN/TS 17708


March 2022
ICS 65.080
English Version

Plant biostimulants - Preparation of sample for microbial
Biostimulants des végétaux - Préparation de Biostimulanzien für die pflanzliche Anwendung -
l'échantillon pour l'analyse microbienne Probenvorbereitung für die mikrobielle Analyse
This Technical Specification (CEN/TS) was approved by CEN on 3 January 2022 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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, Turkey and
United Kingdom.



CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17708:2022 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST-TS CEN/TS 17708:2023
CEN 17708:2022 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principle . 7
5 Diluents . 7
6 Apparatus . 7
7 Sampling and storage . 8
8 Preparation of samples and suspension . 8
8.1 Protocol for enumeration of beneficial microorganisms . 8
8.2 Protocol for enumeration of not-desirable microorganisms . 10
8.3 Protocol for the determination of anaerobic plate count . 11
8.4 Protocol for the detection of pathogenic microorganisms . 11
8.5 Further dilutions . 12
8.6 Duration of the procedure . 12
Annex A (informative) Plating procedure . 13
Annex B (informative) Dilu

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.