Plant biostimulants - Claims - Part 5: Determination of availability of confined nutrients in the soil or rhizosphere

The claim described in this document concerns the improvement of availability of confined nutrients in the soil or rhizosphere by a plant biostimulant.
This document is aimed primarily at manufacturers, laboratories, researchers, technical centres, companies that will put the products on the market, notifying authorities, notified bodies, and market surveillance authorities.

Pflanzen-Biostimulanzien - Auslobungen - Teil 5: Bestimmung der Verfügbarkeit von im Boden und in der Rhizosphäre gebundenen Nährstoffen

Die in diesem Dokument beschriebene Auslobung betrifft die Verbesserung der Verfügbarkeit von im Boden oder in der Rhizosphäre gebundenen Nährstoffen durch ein Pflanzen-Biostimulans.
Dieses Dokument richtet sich in erster Linie an Hersteller, Labore, Forschungstätige, technische Zentren, Unternehmen, die die Produkte in Verkehr bringen werden, notifizierende Behörden, notifizierte Stellen und Marktüberwachungsbehörden.

Biostimulants des végétaux - Allégations - Partie 5 : Détermination de la disponibilité des éléments nutritifs confinés dans le sol ou la rhizosphère

L’allégation décrite dans le présent document concerne l’amélioration de la disponibilité des éléments nutritifs confinés dans le sol ou la rhizosphère grâce à un biostimulant des végétaux.
Le présent document est principalement destiné aux fabricants, aux laboratoires, aux chercheurs, aux centres techniques, aux sociétés qui vont mettre les produits sur le marché, aux autorités notifiantes, aux organismes notifiés et aux autorités de surveillance du marché.

Rastlinski biostimulanti - Navedbe - 5. del: Določevanje razpoložljivosti hranil v tleh in rizosferi

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
23-Mar-2022
Completion Date
23-Mar-2022

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SLOVENSKI STANDARD
kSIST-TS FprCEN/TS 17700-5:2021
01-november-2021
[Not translated]

Plant biostimulants - Claims - Part 5: Determination of availability of confined nutrients in

the soil or rhizosphere

Biostimulanzien für die pflanzliche Anwendung - Angaben - Teil 5: Verfügbarkeit von im

Boden und in der Rhizosphäre enthaltenen Nährstoffen

Biostimulants des végétaux - Allégations - Partie 5 : Détermination de la disponibilité des

éléments nutritifs confinés dans le sol ou la rhizosphère
Ta slovenski standard je istoveten z: FprCEN/TS 17700-5
ICS:
65.080 Gnojila Fertilizers
kSIST-TS FprCEN/TS 17700-5:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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kSIST-TS FprCEN/TS 17700-5:2021
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kSIST-TS FprCEN/TS 17700-5:2021
FINAL DRAFT
TECHNICAL SPECIFICATION
FprCEN/TS 17700-5
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
September 2021
ICS 65.080
English Version
Plant biostimulants - Claims - Part 5: Determination of
availability of confined nutrients in the soil or rhizosphere

Biostimulants des végétaux - Allégations - Partie 5 : Biostimulanzien für die pflanzliche Anwendung -

Détermination de la disponibilité des éléments nutritifs Angaben - Teil 5: Verfügbarkeit von im Boden und in

confinés dans le sol ou la rhizosphère der Rhizosphäre enthaltenen Nährstoffen

This draft Technical Specification is submitted to CEN members for Vote. It has been drawn up by the Technical Committee

CEN/TC 455.

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.

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 Technical Specification. It is distributed for review and comments. It is subject to change

without notice and shall not be referred to as a Technical Specification.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TS 17700-5:2021 E

worldwide for CEN national Members.
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kSIST-TS FprCEN/TS 17700-5:2021
FprCEN/TS 17700-5:2021 (E)
Contents Page

European foreword ............................................................................................................................................. 3

Introduction .......................................................................................................................................................... 4

1 Scope .......................................................................................................................................................... 5

2 Normative references .......................................................................................................................... 5

3 Terms and definitions ......................................................................................................................... 5

4 Terminology of the claims ................................................................................................................. 6

4.1 Claims ........................................................................................................................................................ 6

5 Assessment markers to validate the claim .................................................................................. 6

5.1 General considerations for markers measurements ............................................................... 6

5.2 Soil or rhizosphere markers ............................................................................................................. 6

5.2.1 Soil sample preparation ..................................................................................................................... 6

5.2.2 Available soil nutrient determination ........................................................................................... 7

5.3 Plant markers ......................................................................................................................................... 7

5.3.1 Plant sample preparation .................................................................................................................. 7

5.3.2 Plant nutrient determination ........................................................................................................... 7

6 Specifications for the performance of the trials ........................................................................ 8

6.1 General specifications ......................................................................................................................... 8

6.2 Trial design .............................................................................................................................................. 8

6.2.1 General ...................................................................................................................................................... 8

6.2.2 Timetable of measures ........................................................................................................................ 8

Annex A (informative) Methods to measure the nutrient availability in soil or

rhizosphere ............................................................................................................................................. 9

Annex B (informative) Digestion and analysis of plant samples ....................................................11

B.1 Example of procedure for the digestion of plant samples ....................................................11

B.2 Example of methods for plant nutrient analysis ......................................................................11

Annex C (informative) Triangle of soil Texture.....................................................................................12

Bibliography ........................................................................................................................................................13

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kSIST-TS FprCEN/TS 17700-5:2021
FprCEN/TS 17700-5:2021 (E)
European foreword

This document (FprCEN/TS 17700-5:2021) has been prepared by Technical Committee CEN/TC 455

“Plant biostimulants”, the secretariat of which is held by AFNOR.
This document is currently submitted to the Vote on TS.

The CEN/TS 17700 series, Plant biostimulants - Claims, consists of the following parts:

— Part 1: General Principles;

— Part 2: Nutrient use efficiency resulting from the use of a plant biostimulant;

— Part 3: Tolerance to abiotic stress resulting from the use of a plant biostimulant;

— Part 4: Determination of quality traits resulting from the use of a plant biostimulant;

— Part 5: Determination of availability of confined nutrient in the soil or rhizosphere.

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kSIST-TS FprCEN/TS 17700-5:2021
FprCEN/TS 17700-5:2021 (E)
Introduction

This document has been developed to provide guidance for a consistent approach to justify the claims

associated with the use of plant biostimulants in agriculture.

The definition of plant biostimulants to be used in the regulation on fertilizing materials is claims-based.

For this reason, demonstrating that a product is indeed a bona fide plant biostimulant depends on a

demonstration of its effect.

The placing of a plant biostimulant on the market should never be considered to guarantee effectiveness

under all conditions, as many factors may influence the performance of a plant biostimulant in the field.

Plant Biostimulants used in agriculture can be applied in multiple ways: on soil, on plant, as seed

treatment, etc. This document is applicable to all application types of plant biostimulants in agriculture.

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kSIST-TS FprCEN/TS 17700-5:2021
FprCEN/TS 17700-5:2021 (E)
1 Scope

The claim described in this document concerns the improvement of availability of confined nutrients in

the soil or rhizosphere by a plant biostimulant.

This document is aimed primarily at manufacturers, laboratories, researchers, technical centres,

companies that will put the products on market, notifying authorities, notified bodies, and market

surveillance authorities.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

CEN/TS 17700-1:— , Plant biostimulants - Claims Part 1: General Principles
CEN/TS 17724:— , Plant biostimulants - Terminology
3 Terms and definitions

For the purposes of this document, the terms and definitions given in CEN/TS 17700-1:—,

CEN/TS 17724:— and the following apply.
3.1
available nutrient
element either present in the soil solution or exchangeable on soil colloids
3.2
confined nutrient

element present in the solid and gaseous phases of the soil, excepting soil colloids

3.3
improvement of availability of confined nutrients in the soil or rhizosphere

moving soil nutrients from the pool of confined nutrients to the pool of available nutrients

3.4
rhizosphere
volume of soil around living roots that is influenced by root activities
3.5
soil

layer of unconsolidated material consisting of weathered material particles, dead and living organic

matter, air space, and soil solution
3.6
soil solution
liquid phase of the soil and its solutes
Under preparation. Current stage is: FprCEN/TS 17700-1:2021.
Under preparation. Current stage is: FprCEN/TS 17724:2021.
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kSIST-TS FprCEN/TS 17700-5:2021
FprCEN/TS 17700-5:2021 (E)
3.7
soil colloid

finer size fraction of the soil (clay and organic matter), being also considered as the most chemically active

portion of the soil because of its large surface area and the chemical structure of the materials involved

4 Terminology of the claims
4.1 Claims

Claimed improvement of availability of confined nutrients shall be completed with one or more

nutrient(s) which is/are concerned by this effect (e.g. nitrogen (N), phosphorus (P), nitrogen and

phosphorus (N and P), zinc (Zn), microelements, …).

Moreover, it is possible to specify in the claim if it is applied to soil or rhizosphere or both.

Some examples of claims which can be mentioned on the label are presented hereunder:

• “Improve availability of microelements confined in soil and rhizosphere”,
• “Improve availability of phosphorus in rhizosphere”,
• “Improve availability of nitrogen in soil”.
5 Assessment markers to validate the claim
5.1 General considerations for markers measurements

Improvement of the availability of nutrient confined in the soil shall be evaluated by comparing the

concentration or quantity of the available nutrient element (in the soil, soil and rhizosphere or plants) in

control treatment (without plant biostimulant application) and in plant biostimulant treatment (applied

plant biostimulant).

Markers shall be determined with the same methods and same equipment on both control treatment and

plant biostimulant treatment.

Markers to evaluate the improvement of the availability of nutrient confined in the soil or rhizosphere,

noted as markers in the text, could be determined on 3 different matrixes (soil, soil and rhizosphere or

plants). For each matrix, markers shall be determined on representative samples.

NOTE Growing media are not considered as soil or soil rhizosphere in this document.

5.2 Soil or rhizosphere markers
5.2.1 Soil sample preparation
Soil or rhizosphere samples should be processed according to EN 16179.

After sampling, the soil or rhizosphere samples should be kept cool and processed as soon as possible

(ISO 18512 may be used for the preservation and storage of soil samples).

Prior to analysis, the soil or rhizosphere samples can be air-dried, or dried in an oven at temperatures

not exceeding 40 °C for at least 72h, or freeze-dried or cool stored (4°C) according to the recommended

methodology for the measured markers.
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kSIST-TS FprCEN/TS 17700-5:2021
FprCEN/TS 17700-5:2021 (E)
5.2.2 Available soil nutrient determination

Available nutrient concentration in the soil or rhizosphere shall be determined after extraction and

...

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