GB7908-1999

Classification of forest tree seed quality

林木种子质量分级

GB 7908-1999 est une norme nationale chinoise obligatoire en vigueur : Classification of forest tree seed quality. Secteur : Alimentation. Thème principal : Étiquetage et classification. Entrée en vigueur : 1 avr. 2000.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

This standard applies to the quality grading of tree and shrub seeds used for nursery cultivation, afforestation, greening, and domestic or international trade. It is mandatory for manufacturers and traders dealing with forestry seeds in China. The standard covers 149 major tree species, including Pinus, Quercus, and Eucalyptus.

Exigences techniques

GB 7908-1999 classifies forest tree seed quality into three grades (Grade I, II, and III). The classification is based on several key technical indicators: seed purity, germination rate, seed viability, goodness, and moisture content. If the individual indicators do not fall into the same grade, the lowest indicator determines the final seed grade. The standard provides specific threshold limits for each of the 149 listed tree species. It is important to note that the moisture content limits are specifically applicable during seed purchasing, transportation, and temporary storage.

Méthodes d’essai

The testing methods and determination procedures for seed purity, germination rate, and viability are based on the 1993 International Seed Testing Association (ISTA) Rules. The standard utilizes these internationally recognized testing protocols to ensure consistency and fairness in trade.

Questions fréquentes

What products are regulated under GB 7908-1999?

GB 7908-1999 regulates the quality grading of forest tree and shrub seeds used for afforestation, greening, and trade in China, covering 149 major tree species.

What are the grading criteria for forest tree seeds?

Seeds are classified into three grades based on purity, germination rate, viability, goodness, and moisture content. The final grade is determined by the lowest individual indicator.

Does GB 7908-1999 align with international standards?

Yes, the standard was revised by referencing the testing methods of the 1993 International Seed Testing Association (ISTA) Rules to facilitate international trade and economic exchange.

The summary above provides a high-level overview of GB 7908-1999. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 7908-1999 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Produit
CCS: B61
ICS: 65.020.20
Autorité compétente: National Forestry and Grassland Administration
Comité technique: National Technical Committee on Forestry and Grassland Seeds of Standardization Administration of China

Relations

Remplace:GB 7908-1987