GB/T 8822.10-1988

This standard defines the specific geographic seed zones for Larix principis-rupprechtii Mayr (Prince Rupprecht's larch) within China. It is applied in forestry and ecological restoration projects to guide the collection, transfer, and use of seeds, ensuring that planting materials are sourced from and used within climatically and ecologically suitable regions. The standard helps maintain genetic adaptation and prevent maladaptation in reforestation and afforestation efforts across northern China.