Effect of Long-term Storage on Seed Quality of Masson Pine

The seeds of masson pine from five seed sources within three climate zoneswere stored in two ways.The quality of the stored seeds was measured year by year in 11years after seed collection.The results showed that,using the method of open storage in theair,the germination rate of the seeds was reduced to 2%～0% after 3～4 years and the vitality were forfeited entirely,while using closed storage method under low temperature of 2～4℃,the seeds from northern subtropical zone could be stored for 8 years,middle subtropicalzone over 10 years,and southern subtropical zone 3～4 years,when their germination ratewere still over 70% of the originai germination rate,and the stored seeds could still be usedin production.The stored seeds must be developed normally and ripen completely,and soshould be collected in optimum seed-collecting time.