1、BSI Standards PublicationBS ISO 18644:2016Fertilizers and soil conditioners Controlled-release fertilizer General requirementsBS ISO 18644:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 18644:2016.The UK participation in its preparation was entrusted to T
2、echnicalCommittee CII/37, Fertilisers and related chemicals.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The B
3、ritish Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 82553 8ICS 65.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2
4、016.Amendments issued since publicationDate Text affectedBS ISO 18644:2016 ISO 2016Fertilizers and soil conditioners Controlled-release fertilizer General requirementsMatires fertilisantes Engrais libration contrle Exigences gnralesINTERNATIONAL STANDARDISO18644First edition2016-04-15Reference numbe
5、rISO 18644:2016(E)BS ISO 18644:2016ISO 18644:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electron
6、ic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, G
7、eneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 18644:2016ISO 18644:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Classification 25 Requirements 26 Testing method . 37 Sampling and preparation of test sample 48 Marking
8、and labelling . 59 Package, transport, and storage . 5Bibliography 6 ISO 2016 All rights reserved iiiContents PageBS ISO 18644:2016ISO 18644:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
9、 preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental
10、, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO
11、/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibilit
12、y that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of pate
13、nt declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as inform
14、ation about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 134, Fertilizers and soil conditioners.iv ISO 2016 All rights reservedBS ISO
15、 18644:2016INTERNATIONAL STANDARD ISO 18644:2016(E)Fertilizers and soil conditioners Controlled-release fertilizer General requirements1 ScopeThis International Standard specifies the requirements for testing methods, sampling and preparation of test sample, marking and labelling, as well as package
16、, transport, and storage of controlled-release fertilizer.This International Standard is applicable to controlled-release products having one or more primary fertilizer nutrient (nitrogen and/or phosphorous and/or potassium) in a controlled-release form. They can be made by bulk blending (BB) fertil
17、izers or by special processes.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
18、document (including any amendments) applies.ISO 5315, Fertilizers Determination of total nitrogen content Titrimetric method after distillationISO 6598, Fertilizers Determination of phosphorus content Quinoline phosphomolybdate gravimetric methodISO 7409, Fertilizers Marking Presentation and declara
19、tionsISO 7410, Fertilizers and soil conditioners Final samples Practical arrangementsISO 7742:1988, Solid fertilizers Reduction of samplesISO 8397, Solid fertilizers and soil conditioners Test sievingISO 8633, Solid fertilizers Simple sampling method for small lotsISO 17319, Fertilizers and soil con
20、ditioners Determination of water-soluble potassium content Potassium tetraphenylborate gravimetric methodEN 13266, Slow-release fertilizers Determination of the release of the nutrients Method for coated fertilizers3 Terms and definitionsFor the purposes of this document, the following terms and def
21、initions apply.3.1controlled-release fertilizerfertilizer in which nutrient release is controlled, meeting the stated release rate of nutrient and the stated release time at a specified temperatureNote 1 to entry: Typical examples are coated fertilizers.SOURCE: ISO 8157:2015, 2.1.12, modified ISO 20
22、16 All rights reserved 1BS ISO 18644:2016ISO 18644:2016(E)3.2controlled-release nutrientone or more of the primary nutrient/s, nitrogen and/or phosphorus and/or potassium, in controlled-release fertilizers with controlled-release characteristicsNote 1 to entry: In quantitative denotation, controlled
23、-release nutrient does not include the parts of nutrients without controlled-release characteristics. For example, if a 15-15-15 compound fertilizer only contains controlled-release nitrogen, and on a mass fraction basis only 10 % of the total mass is controlled-release nitrogen, then the term contr
24、olled-release nutrient only applies to the 10 % nitrogen.3.3initial release rate of nutrientratio of the fraction released within a 24 h time period at 25 C (or such temperature specified by the manufacturer) in static water, divided by the total controlled release fractionNote 1 to entry: Sometimes
25、 there is a portion of the nutrient in the production of controlled-release fertilizer that does not exhibit controlled-release characteristics, and as such is released ahead of time.Note 2 to entry: The initial release rates of nutrients of multiple nutrient elements in controlled-release fertilize
26、rs shall be denoted with the total nitrogen release rates; if no nitrogen is contained, the initial release rates of nutrient shall be denoted as the release rates of phosphorus and/or potassium.3.4cumulative release mass fraction of nutrientmass ratio of the cumulative released nutrient during a gi
27、ven period to the total of the nutrients, denoted with the mass ratio of the cumulative released nutrients during several consecutive periods as a whole, under condition of 25 C static water (or such temperature specified by the manufacturer), to the total of the nutrientsNote 1 to entry: The cumula
28、tive release mass fraction of multiple nutrient elements in controlled-release fertilizers shall be denoted with the total nitrogen release mass fraction; if no nitrogen is contained, the cumulative release mass fraction of nutrient shall be denoted with release mass fraction of phosphorus or potass
29、ium.3.5stated release timerelease time of a controlled release nutrient, denoted with the time necessary to reach 75 % cumulative release rate since the start of extraction, under the condition of 25 C static water (or such temperature specified by the manufacturer)Note 1 to entry: The release time
30、for controlled-release fertilizer must be stated. Different countries/regions may have various numbers of percentages concerning stated release time.4 ClassificationThe products shall be classified by core categories, such as controlled-release nitrogenous fertilizer, controlled-release phosphorus f
31、ertilizer, controlled-release potash fertilizer, controlled-release compound (N, P, K) fertilizer, controlled-release bulk blend fertilizer (BB fertilizer), and any other primary (N, P, K) nutrient that may be coated as controlled released.5 Requirements5.1 Appearance: The product shall be in granul
32、es, free flowing, moisture free, and without any foreign matter.5.2 The controlled-release fertilizer shall be in accordance with the requirements set forth in Table 1, as well as the values declared on containers.2 ISO 2016 All rights reservedBS ISO 18644:2016ISO 18644:2016(E)Table 1 Requirement on
33、 controlled release fertilizerItem 1 ValuesMass fraction of total nutrient (N + P2O5+ K2O)a,b,c, % 20Particle sizec(1,00 mm to 4,75 mm), % 90Nutrient release periodd/days = Marked valueInitial release rate of nutriente, % 15Cumulative release mass fraction of nutrient in 28 de, % 75Cumulative releas
34、e mass fraction of nutrient during nutrient release periode, % 75aThe total nutrient content is the sum of the nutrients (P and K in oxides P2O5and K2O) as stated on the label.For single nutrient fertilizer (N or P2O5or K2O), the value shall not be lower than 18 %.bThe single nutrient content of thr
35、ee or two elements controlled-release fertilizer shall not be lower than 4,0 %.cThe related requirements specified by the countries or regions shall be followed.dNutrient release period shall be marked with a single value with a tolerance of 20 %. If the marked value is 180 d, the time necessary for
36、 cumulative release rate of nutrient reaching to 75 % is allowed to be 180 36 d; if the marked value is 90 d, the time necessary for cumulative release rate of nutrient reaching to 75 % is allowed to be 90 18 d.eThe nutrient release mass fraction of three or two elements controlled-release fertilize
37、r shall be denoted with the total release mass fraction of nitrogen; if no nitrogen is contained, the release mass fraction of nutrient shall be denoted with the release mass fraction of potassium or phosphorus.6 Testing method6.1 AppearanceThe appearance shall be determined by visual method.6.2 Det
38、ermination of total nitrogenDetermine the total nitrogen content in accordance with ISO 5315.NOTE If the total nitrogen content is low, the analyst can also refer to the Bibliography for an alternative method.6.3 Determination of available phosphorusDetermine the phosphorus content in accordance wit
39、h ISO 6598.6.4 Determination of potassiumDetermine the potassium content in accordance with ISO 17319.6.5 Determination of grain sizeDetermine the grain size in accordance with ISO 8397.6.6 Determination of nutrient release rate/mass fractionDetermine the nutrient release rate/mass fraction in accor
40、dance with EN 13266. ISO 2016 All rights reserved 3BS ISO 18644:2016ISO 18644:2016(E)7 Sampling and preparation of test sample7.1 Sampling method7.1.1 Products in bagsCarry out sampling operation by following the procedure described in ISO 8633. Care should be taken to avoid any damage to, or destru
41、ction of, the coating.7.1.2 Products in bulkCarry out sampling operation by following the procedure described in ISO 8633.7.2 Reduction of samplesMix all the increments (collected as in 7.1) uniformly and promptly to form a single aggregate sample using a device or by hand. The aggregate sample is r
42、educed to about 1 kg by the riffle sample divider method (see ISO 7742:1988, A.2) or the quartering method (see ISO 7742:1988, A.3). Next, divide into two parts for final laboratory samples. The two laboratory samples are put into two clean and dry glass or plastic containers or any other inert mate
43、rial of adequate resistance capable of maintaining the sample in its original condition. The containers shall be fitted with airtight closures. Carry out all the operations described earlier as rapidly as possible to avoid loss or gain of moisture. Each container shall be secured and sealed followin
44、g the instruction given in ISO 7410. Each laboratory sample shall be labelled following the instructions given in ISO 7410. The label shall, at minimum, carry the following information:a) the name of manufacturer;b) the name of product and type;c) the manufacturers reference and batch number or prod
45、uction date (if available);d) the lot size;e) the date of sampling;f) the place of sampling;g) the signature of the sampler;h) the signature and name of the person or his representative on whose premises the sample was taken;i) the stated release period (days) and temperature (C) defined by appropri
46、ate test procedures.One of the containers is used for further quality analysis, while the other is kept for additional analysis in 6 months.7.3 Test sample preparationSelect one of the laboratory samples from the two containers obtained in 7.2. Mix the content of the container according to the proce
47、dure in ISO 7742:1988. The test sample used for determining the mass fraction of total nutrient, mass fraction of water-soluble P to effective P, particle size, nutrient release period, initial release rate of nutrient, cumulative release rate of nutrient in 28 d, and cumulative release rate of nutr
48、ient during nutrient release period should be reduced to an appropriate amount. All of the test samples are put into clean and dry bottles to be used for further analysis.4 ISO 2016 All rights reservedBS ISO 18644:2016ISO 18644:2016(E)8 Marking and labelling8.1 For marking and labelling, the relevan
49、t national (or regional) legislation needs to be followed. Also, for the classification of health, safety, environment, storage, and transport, the appropriate legislation needs to be followed. The following (8.2 to 8.8) are the guidelines.8.2 The product name shall be the name of the core fertilizer prescribed in the existing national or industrial standard with the prefix of “controlled-release” or “coated controlled-release”.8.3 The package should be marked with total nutrient content
