Complete Analysis of Korean Pine Seed Collection Time and Methods

The time and methods for collecting Korean pine seeds are as follows: in natural Korean pine forests, the proportion of seed-bearing trees in 80-to-100-year-old stands accounts for over 91%. To solve the problem of insufficient Korean pine seeds, clonal seed orchards have been established, but they have not yet produced large quantities of seed. In natural forests, stands with good site conditions and vigorous growth are selected and designated as seed production stands, with intensified tending and management to prepare for seed collection. Korean pine cones mature from September to early October. When the cones turn from green to yellow-green and some seed scales begin to split, they enter the early ripening stage. After that, the seed scales gradually turn yellow, and individual cones begin to fall, reaching the full ripening stage, at which point they should be collected promptly. The collected cones are placed in a well-ventilated, dry place for after-ripening. Take care not to let them heat up. When the scales of most cones separate, the seeds can be threshed out. Then they are water-selected, sun-dried, and cleaned of debris. When the seed moisture content drops to 9%, they can be packed into iron drums and stored in a well-ventilated, dry seed warehouse or underground storage; stored at 4 degrees Celsius. The thousand-seed weight of Korean pine seeds varies greatly: large seeds weigh about 600 grams, medium seeds 350 to 400 grams, and small seeds 270 grams.