Plant biostimulants - Determination of microorganisms' concentration

This document specifies general rules to determine the concentration of microorganisms present in plant biostimulants.
The method is applicable to microbial plant biostimulants for verifying that the concentration of microorganisms does not exceed the respective limits outlined in the EU Regulation on Fertilising Products [1].
This horizontal method might not be appropriate in every detail for certain products. In this case, it is necessary to refer to the methodology of specific determination and quantification of the microorganisms.

Pflanzen-Biostimulanzien - Bestimmung der Konzentration von Mikroorganismen

Dieses Dokument legt allgemeine Regeln für die Bestimmung der Konzentration von Mikroorganismen in Pflanzen-Biostimulanzien fest.
Das Verfahren ist auf mikrobielle Pflanzen-Biostimulanzien anwendbar, und zwar, um zu verifizieren, dass die Konzentration von Mikroorganismen die entsprechenden Grenzwerte der EU Düngeprodukteverordnung [1] nicht überschreitet.
Dieses horizontale Verfahren ist für bestimmte Produkte nicht unbedingt bis ins Detail geeignet. In diesem Fall ist es notwendig, auf die Methodik der spezifischen Bestimmung und Quantifizierung der Mikro-organismen zurückzugreifen.

Biostimulants des végétaux - Détermination de la concentration en microorganismes

Le présent document spécifie les règles générales pour déterminer la concentration en microorganismes présents dans les biostimulants des végétaux.
La méthode est applicable aux biostimulants des végétaux microbiens pour vérifier que la concentration en microorganismes ne dépasse pas les limites correspondantes indiquées dans le Règlement UE sur les fertilisants [1].
Cette méthode horizontale pourrait ne pas être appropriée dans chaque détail pour certains produits. Dans ce cas, il est nécessaire de se référer à la méthodologie de détermination et de quantification spécifique des microorganismes.

Rastlinski biostimulanti - Določevanje koncentracije mikroorganizmov

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4599 - Dispatch of FV draft to CMC - Finalization for Vote
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Standards Content (Sample)

oSIST prEN 17714:2023
Rastlinski biostimulanti - Določevanje koncentracije mikroorganizmov
Plant biostimulants - Determination of microorganisms' concentration
Pflanzen-Biostimulanzien - Bestimmung der Konzentration von Mikroorganismen
Biostimulants des végétaux - Détermination de la concentration en microorganismes
Ta slovenski standard je istoveten z: prEN 17714
65.080 Gnojila Fertilizers
oSIST prEN 17714:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17714:2023

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oSIST prEN 17714:2023

prEN 17714


April 2023
ICS 65.080 Will supersede CEN/TS 17714:2022
English Version

Plant biostimulants - Determination of microorganisms'
Biostimulants des végétaux - Détermination de la Pflanzen-Biostimulanzien - Bestimmung der
concentration en microorganismes Konzentration von Mikroorganismen
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 17714:2023 E
worldwide for CEN national Members.

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oSIST prEN 17714:2023
prEN 17714:2023 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principe of the method . 7
5 Sampling . 7
6 Preparation of sample for microbial analysis . 7
7 Method for enumeration of microorganism . 7
7.1 General. 7
7.2 Enumeration using a solid media. 8
7.3 Enumeration and quantification using a liquid medium . 16
8 Expression of results .

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