Plant biostimulants - Determination of Enterococcaceae

This methodology has been developed to determine enterococci in biostimulants as a single microorganism component or in a mixture with other microorganisms. This document is not applicable to mineral fertilizers that are defined as complementary feeding stuffs composed mainly of minerals and containing at least 40 % crude ash (Council Directive 79/373/EEC) [3].

Pflanzen-Biostimulanzien - Bestimmung von Enterococcaceae

Dieses Verfahren wurde zur Bestimmung von Enterokokken in Biostimulanzien als einzelner Mikroorganismus-Bestandteil oder in einem Gemisch mit anderen Mikroorganismen entwickelt. Dieses Dokument ist nicht anwendbar auf mineralische Düngemittel, die als Ergänzungsfuttermittel festgelegt sind, hauptsächlich aus Mineralstoffen zusammengesetzt sind und mindestens 40 % Rohasche enthalten (Richtlinie 79/373/EWG) [3].

Biostimulants des végétaux - Détermination des Enterococcaceae

Cette méthodologie a été développée pour déterminer les entérocoques dans les biostimulants en tant que composant unique d’un microorganisme ou dans un mélange avec d’autres microorganismes. Le présent document ne s’applique pas aux engrais minéraux utilisés comme aliments complémentaires des animaux, principalement composés de minéraux et contenant au moins 40 % de cendres brutes (Directive du Conseil 79/373/CEE) [3].

Rastlinski biostimulanti - Ugotavljanje prisotnosti in števila enterokokov (Enterococcaceae)

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Standards Content (Sample)

oSIST prEN 17720:2023
Rastlinski biostimulanti - Ugotavljanje prisotnosti in števila enterokokov
Plant biostimulants - Determination of Enterococcaceae
Pflanzen-Biostimulanzien - Bestimmung von Enterococcaceae
Biostimulants des végétaux - Détermination des Enterococcaceae
Ta slovenski standard je istoveten z: prEN 17720
65.080 Gnojila Fertilizers
oSIST prEN 17720:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17720:2023

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oSIST prEN 17720:2023

prEN 17720


April 2023
ICS 65.080 Will supersede CEN/TS 17720:2022
English Version

Plant biostimulants - Determination of Enterococcaceae
Biostimulants des végétaux - Détermination des Pflanzen-Biostimulanzien - Bestimmung von
Enterococcaceae Enterococcaceae
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 17720:2023 E
worldwide for CEN national Members.

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oSIST prEN 17720:2023
prEN 17720:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 7
4 Principle . 8
5 Diluents, selective media and test kit for phenotypic characterization . 8
5.1 General . 8
5.2 Diluent for initial suspension and for serial dilutions . 8
5.3 Selective media . 8
5.4 Phenotypic characterization and confirmation . 8
6 Apparatus and glassware . 9
7 Sampling .

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