Plant biostimulants - Determination of Azospirillum spp.

This document provides the methodology for the enumeration and determination of Azospirillum spp. in microbial plant biostimulants.
This document is applicable to the blends of fertilizing products where a blend is a mix of at least two of the following component EU fertilizing products categories: Fertilizers, Liming Materials, Soil Improvers, Growing Media, Plant Biostimulants and where the following category Plant Biostimulants is the highest percentage in the blend by mass or volume, or in the case of liquid form by dry mass. If Plant Biostimulants is not the highest percentage in the blend, the European Standard for the highest percentage of the blend applies. In case an end of fertilizing products is composed of components in equal quantity or in case the component EU fertilising products used for the blend have identical formulations , the user decides which standard to apply.

Pflanzen-Biostimulanzien - Bestimmung von Azospirillum spp.

Dieses Dokument stellt die Methodik für die Zählung und Bestimmung von Azospirillum spp. in mikrobiellen Pflanzen-Biostimulanzien bereit.
Dieses Dokument ist für die Mischungen von Düngeprodukten anwendbar, in denen eine Mischung aus mindestens zwei der folgenden Kategorien von Komponenten-EU Düngeprodukten besteht: Düngemittel, Kalkdünger, Bodenverbesserungsmittel, Kultursubstrate, Pflanzen-Biostimulanzien und wenn die folgende Kategorie Pflanzen-Biostimulanzien prozentual den höchsten Massen- oder Volumenanteil in der Mischung bzw., bei flüssiger Form, den höchsten Trockenmasseanteil aufweist. Wenn Pflanzen-Biostimulanzien nicht den höchsten prozentualen Anteil in der Mischung ausmachen, ist die für den höchsten prozentualen Anteil geltende Europäische Norm anwendbar. Falls eine Düngemittelmischung aus Komponenten gleicher Menge besteht oder falls die für die Mischung verwendeten Komponenten-EU Düngeprodukte identische Formulierungen  haben, entscheidet der Anwender, welche Norm angewendet wird.

Biostimulants des végétaux - Détermination d'Azospirillum spp.

Le présent document fournit la méthodologie de dénombrement et de détermination d’Azospirillum spp. dans les biostimulants microbiens des végétaux.
Le présent document est applicable aux mélanges de fertilisants constitués d’au moins deux composants appartenant aux catégories de fertilisants UE suivantes : engrais, amendements minéraux basiques, amendements du sol, supports de culture, biostimulants des végétaux et, dans lesquels la catégorie Biostimulants des végétaux représente le pourcentage le plus élevé du mélange en masse ou en volume, ou dans le cas d’un liquide, en masse sèche. Si les biostimulants des végétaux ne représentent pas le pourcentage le plus élevé du mélange, la Norme européenne relative au composant représentant le pourcentage le plus élevé du mélange s’applique. Dans le cas où un mélange de fertilisants contient des composants en quantité égale ou dans le cas où les composants des fertilisants UE utilisés pour le mélange ont des formulations  identiques, l’utilisateur décide quelle norme appliquer.

Rastlinski biostimulanti - Določanje Azospirillum spp.

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Standards Content (Sample)

oSIST prEN 17713:2023
Rastlinski biostimulanti - Ugotavljanje prisotnosti in števila Azospirillum spp.
Plant biostimulants - Determination of Azospirillum spp.
Pflanzen-Biostimulanzien - Bestimmung von Azospirillum spp.
Biostimulants des végétaux - Détermination d'Azospirillum spp.
Ta slovenski standard je istoveten z: prEN 17713
65.080 Gnojila Fertilizers
oSIST prEN 17713:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17713:2023

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oSIST prEN 17713:2023

prEN 17713


April 2023
ICS 65.080 Will supersede CEN/TS 17713:2022
English Version

Plant biostimulants - Determination of Azospirillum spp.
Biostimulants des végétaux - Détermination Pflanzen-Biostimulanzien - Bestimmung von
d'Azospirillum spp. Azospirillum spp.
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 17713:2023 E
worldwide for CEN national Members.

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oSIST prEN 17713:2023
prEN 17713:2023 (E)
Contents Page
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Enumeration of Azospirillum spp. . 7
4.1 General . 7
4.2 Sample preparation . 8
4.2.1 General . 8
4.2.2 Liquid -based water- formulations . 8
4.2.3 Liquid – oil based (emulsifiable concentrate -EC) formulations . 8
4.2.4 Solid - Wettable Powder (WP) formulations . 8
4.2.5 Solid - Water dispersible granules (WDG) formulations . 8
4.2.6 Solid – Pellets, granules, microgranuls (slow release) formulations . 8
4.2.7 Solid - substrate . 8
4.3 Requirements (apparatus) . 8
4.4 Serial dilution .

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