This standard applies to Hami melon seeds sold as commodities, seeds bred according to plan in state-owned farms, original (improved) seeds, and special breeding areas of communes, Hami melon seeds for production units, and Hami melon variety seeds bred and approved by scientific research, teaching, breeding units and individuals. GB 4862-1984 Chinese Hami melon seeds GB4862-1984 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
The seed of Chinese hami melonUDC 635.61- 152
（510）www.bzxz.net
GB 486284
This standard applies to Hami melon seeds for commercial operation, seeds propagated according to plan by state-owned farms, original (improved) seed farms, and commune special breeding areas, Hami melon seeds for production units, and Hami melon variety seeds bred and approved by scientific research, teaching, breeding units and individuals.
1 Grading Basis
1.1 Seed grading is based on variety purity, cleanliness, and germination rate, among which variety purity is the main grading standard. 1.2 If one of the two items of cleanliness and germination rate is one level lower than the variety purity level, and one or both of the two items are higher than the variety purity, the grade shall be determined according to the purity level.
1.3 Where both the purity and germination rate are one level lower than the purity of the variety, one of the two is the same level as the purity of the variety and the other is two levels lower than the purity of the variety, or one of the two is one level lower than the purity of the variety and the other is two levels lower, the purity of the variety shall be graded one level lower. 1.4 Where both the purity and germination rate are two levels lower than the purity of the variety, the purity of the variety shall be graded two levels lower, but both shall not be lower than the lowest standard.
Grading indicators of Chinese Hami melon seeds
Seed grade
First-class improved varieties
Second-class improved varieties
Inspection method
Purity not less than
Clarity not less than
Germination rate not less than
Inspection shall be carried out in accordance with GB354383 "Regulations for Inspection of Crop Seeds". Issued by the State Bureau of Standards on January 4, 1985
Moisture content
Implemented on August 1, 1985
GB4862-84
Appendix A
Standard clause explanation
(Supplement)
The meaning of original seed: the seed produced by the purified and rejuvenated varieties newly bred by the breeding unit and starting to be propagated and promoted or the descendants of the original seed, is called Af
original seed.
A.2 Non-quarantine pests and diseases shall be restricted by each province (municipality, autonomous region) according to specific circumstances. A.3 This standard adopts a three-level system, which is different from the four-level system of the national standard for crop seeds. The reason is that according to field trials and indoor identification, the differences between the second-level improved varieties and the third-level improved varieties are not obvious, so the third-level improved varieties are merged into the second level. At the same time, the seeds are divided into too many levels, which is not convenient for production application.
Additional Notes:
This standard was proposed by the Ministry of Agriculture, Animal Husbandry and Fisheries of the People's Republic of China. This standard was hosted by Xinjiang Bayi Agricultural College, and was jointly drafted by Changji Horticultural Farm, Turpan Grape and Fruit Research Institute, and Hami Agricultural Science Institute.
The main drafters of this standard are Yin Jingzhang and Lin Depei.
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