GB/T 3543.3-2025Rules for agricultural seed testing — Part 3: Sowing quality — Purity analysis (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is part 3 of GB/T 3543 “Inspection Procedure for Crop Seeds”. GB/T 3543 has been published in the following parts.

— Part 1: General;

— Part 2: Sampling;

— Part 3: Seeding quality and purity analysis;

— Part 4: Seeding quality germination test;

— Part 5: Variety quality and purity identification;

— Part 6: Determination of moisture content of sowing mass;

— Other items inspection;

— Part 8: Determination of sowing quality and thousand-grain weight;

— Part 9: Determination of sowing quality and viability;

— Part 10.Determination of seeding quality and vitality;

— Part 11.Variety quality and authenticity identification;

— Part 12.Determination of variety quality of genetically modified seeds.

This document replaces GB/T 3543.3-1995 "Crop Seed Inspection Procedure Purity Analysis" and is consistent with GB/T 3543.3-1995.

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

— Changed the terms and definitions of clarity analysis (see Chapter 3, Chapter 3 of the 1995 edition);

— Added general principles for clarity analysis (see Chapter 4);

— Added instrument tweezers and brushes (Chapter 5);

— Changed the clarity analysis procedure (see Chapter 6, Chapter 5 of the 1995 edition);

— Added the analysis of the purity of coated seeds and the number of other plant seeds and clarified the relevant determination contents (see 6.2, Chapter 7);

— Added simplified limited test for the number of seeds of other plants (see 7.1.1.2) and determination of species of Orobancha species (see 7.1.3);

— Changed the rules for distinguishing clean seeds, other plant seeds and impurities, and expanded the scope of types applicable to clean seeds (see Appendix

Appendix A of the 1995 edition), the structure and types of seeds with husks (see Appendix B of the 1995 edition) and cotton seeds were deleted.

Determination of seed-bearing rate (see Appendix C of the 1995 edition);

— Changed the tolerance table (see Appendix B, Tables 2 to 7 of the 1995 edition).

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the Ministry of Agriculture and Rural Affairs of the People's Republic of China.

This document is under the jurisdiction of the National Technical Committee on Standardization of Crop Seeds (SAC/TC37).

This document was drafted by: National Agricultural Technology Extension Service Center, Hunan Seed Quality Inspection Center, Gansu Seed Station, Inner Mongolia Autonomous Region Agricultural and Animal Husbandry Technology Promotion Center, Hebei Province Seed Station, Shenzhen Agricultural Science and Technology Promotion Center, Beijing Seed Management Station, Ningxia Hui...

Autonomous Region Seed Station, Xinjiang Uygur Autonomous Region Seed Industry Development Center.

The main drafters of this document are: Jin Shiqiao, Zhang Like, Zhang Jiaqing, Liu Guohua, Deng Shu, Zheng Jingyi, Liu Jin, Song Ge, Peng Ruidi, Chang Caihong, Li Man, Lian Yingjie, Zhao Jianzong, Jin Fang, Ren Xuezhen, Jing Qi, and Zhou Zeyu.

The previous versions of this document and the documents it replaces are as follows.

— First issued in 1983 as GB 3543-1983;

— First revised in 1995 to GB/T 3543.3-1995;

— This is the second revision.

Introduction

Seed quality has many verifiable cultivation values, forming the currently recognized sowing quality, variety quality, and health quality.

Among them, sowing quality mainly reflects the impact of seed appearance quality on seed sowing, and is divided into physical Quality and physiological quality. The most commonly used physical quality is cleanliness, dryness, fullness, uniformity and other characteristics, such as water Physiological quality mainly reflects the vitality of seeds, especially under suitable environmental control conditions.

The structural function and developmental capacity of seedlings under most conditions, that is, the ability to normally germinate and grow into plants under most conditions. The main indicators of physiological quality are germination Seed variety quality (varietal quality) is also called genetic quality (genetic quality), which mainly reflects the characteristics of agricultural The genetic background characteristics of crop seeds and the degree of consistency of genetic background. At present, the indicators for measuring seed variety quality include variety authenticity, Variety purity, authenticity of transgenic traits and purity of traits, etc. Health quality mainly reflects the health status of seeds, whether there are pathogenic organisms, organisms, such as fungi, bacteria and viruses, and animal pests, including nematodes and insects, and may also involve physiological conditions, such as trace element deficiencies.

GB/T 3543 "Inspection Procedures for Crop Seeds" is the basic standard for seed inspection methods. It consists of general principles, sampling, sowing quality, variety quality It is composed of the following 12 parts. part.

— Part 1: General. The purpose is to establish the general and overall requirements for each part of the inspection procedures for crop seeds and to govern the inspection procedures. Each part of the program.

— Part 2: Sampling. The purpose is to clarify the methods of sampling from seed batches, sub-sampling for testing and preservation of samples. program.

— Part 3: Seeding quality purity analysis. The purpose is to clarify the method for determining the net seed content in crop seed samples program.

— Part 4: Seeding quality germination test. The purpose is to clarify the test method and procedures for the germination of crop seed samples.

— Part 5: Variety quality and purity identification. The purpose is to determine the percentage of seeds of this variety in a seed sample. Methods and procedures.

— Part 6: Determination of moisture content in seeding mass. The purpose is to clarify the method and procedure for moisture content of crop seed samples.

— Part 7: Other items of inspection. The purpose is to clarify the method and procedures for seed sample health.

— Part 8: Determination of 1000-seed weight of sowing quality. The purpose is to clarify the method and procedure for determining the weight of 1000 seeds per seed sample.

— Part 9: Determination of sowing quality viability. The purpose is to clarify the method and procedure for determining the viability of seed samples.

— Part 10.Determination of seed quality vitality. The purpose is to clarify the method and procedure for determining the vitality of seed samples.

— Part 11.Variety quality and authenticity identification. The purpose is to clarify the identification methods and procedures for variety authenticity.

— Part 12.Determination of genetically modified seeds for variety quality. The purpose is to clarify the composition, genetic purity and gene authenticity of genetically modified seeds.

Procedure for determination of authenticity.

This document is the "Clarity Analysis" section of the Crop Seed Inspection Procedure for Seeding Quality. Clarity Analysis and Other Plant Seed Number Determinations These are two different measurement indicators, but in fact, the determination of the number of seeds of other plants is just a special case of purity analysis.

This document considers clarity analysis together with other plant seed number determinations.

Purity is an important indicator of seed quality. In order to control seed quality, seed laws and regulations in various countries around the world clearly stipulate that clean seeds The minimum weight percentage and the list of toxic and harmful seed types and content control. The net seed weight percentage is high and does not contain toxic The quality of seeds is relatively good, as it contains seeds of other harmful plants and weeds. The types and amounts of weeds and impurities contained in the seed batch not only affect The growth and development of crops and the safe storage of seeds also affect the health and safety of humans and animals. Therefore, according to the provisions of the Seed Law, any seed below the net Any poisonous or harmful seeds that exceed the prescribed weight percentage standard or the prescribed number standard shall not be circulated in the market or used for sowing production.

Crop Seed Inspection Procedures Part 3: Seeding quality and purity analysis

1 Scope

This document describes methods for seed purity analysis of agricultural crops and for determining seed number of other plants.

This document applies to the inspection of crop seeds.

2 Normative references

GB/T 3543.1

GB/T 3543.2

GB/T 3543.6

3 Terms and definitions

The following terms and definitions apply to this document.