This standard specifies the quality requirements, inspection methods and inspection rules for buckwheat seeds. This standard applies to buckwheat seeds produced and sold. GB 4404.4-1999 Grain Crop Seed Buckwheat GB4404.4-1999 Standard download decompression password: www.bzxz.net

GB4404.41999
In order to protect agricultural production, safeguard the interests of seed producers, operators and users, avoid the losses caused by the use of unqualified seeds in production, and make the cultivated fine varieties obtain high quality and high yield, a unified quality standard must be used for standardization, and this standard is specially formulated. This standard is based on a large number of experimental studies and typical surveys, and comprehensively formulates the quality standards of buckwheat seeds (i.e., purity, clarity, germination rate, and moisture). At present, there are no hybrids in wheat cultivation. According to unified regulations, the quality of conventional seeds is not graded, and the purity, clarity, and germination rate are set as the minimum indicators, and the moisture is set as the maximum line. This standard is proposed by the Ministry of Agriculture of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Crop Seeds. The responsible drafting units of this standard are: National Agricultural Technology Extension Service Center, Shaanxi Provincial Seed Station, Shanxi Provincial Seed Station, and Inner Mongolia Autonomous Region Seed Station.
The main drafters of this standard are: Zhang Shumin, Su Juping, Xue Yan, Wen Baojiang, and Wei Yuejin. This standard is entrusted to the National Agricultural Technology Extension Service Center of the Ministry of Agriculture for interpretation. 292
1 Scope
National Standard of the People's Republic of China
Seeds of food crops--BuckwheatThis standard specifies the quality requirements, inspection methods and inspection rules for buckwheat seeds. This standard applies to buckwheat seeds produced and sold. 2 Referenced Standards
GB 4404. 4—1999
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T3543.1—1995General rules for inspection of crop seedsGB/T 3543.2-19952
Inspection procedures for crop seeds-Sampling
Inspection procedures for crop seeds-Clarity analysis
GB/T3543.3—19952
GB/T 3543.4—1995
Inspection procedures for crop seeds-Germination test
Inspection procedures for crop seeds-Authenticity and variety purity identificationGB/T 3543.5—1995
Inspection procedures for crop seeds-Determination of moisture content
GB/T 3543.6--1995
GB/T7414—1987Packaging of seeds of major cropsGB/T 7415-1987
3 Definitions
Storage of seeds of major crops
This standard adopts the following definitions.
3.1 Basic seed
Seeds of the first to third generation propagated from breeder seeds or produced according to the basic seed production technical regulations that meet the basic seed quality standards. 3.2 Quality seed
Seeds of the first to third generation propagated from conventional basic seeds or hybrids that meet the quality standards of good seeds. 4 Quality requirements
See Table 1 for the quality indicators of buckwheat seeds.
Approved by the State Administration of Quality and Technical Supervision on September 8, 1999 Purity
Not less than
Not less than
Germination rate
Not less than
Not higher thanbzxz.net
Implemented on February 1, 2000
5 Storage, transportation, packaging, labeling
According to GB/T7414 and GB/T7415.
6 Inspection method
6.1 Sampling
According to GB/T3543.2.
6.2 Clarity analysis
According to GB/T3543.3.
6.3 Germination test
According to GB/T3543.4.
6.4 Authenticity and variety purity identification
According to GB/T3543.5.
6.5 Moisture determination
According to GB/T3543.6.
7 Inspection rules
GB 4404.4—1999
The variety purity index is used as the basis for dividing the seed quality level. If the purity does not meet the original seed index, it will be downgraded to a good seed. If it does not meet the good seed index, it will be an unqualified seed.
One index is set for each of purity, germination rate and moisture. If one of the indexes does not meet the index, it will be an unqualified seed. When comparing the measured values ​​of purity, clarity and germination rate with the specified values ​​in the standard, the allowable error used for comparison with the specified values ​​in GB/T3543.1~3543.6-1995 will not be implemented for the time being. 294
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