Key Techniques of Establishment of the 2~(nd)-Generation Seed Orchard of Pinus massoniana

Based on a genetic test and idioplasm resource flowering observation result,76 superior clones were selected as orchard materials of the 2ndgeneration seed orchard of Pinus massoniana. Among these selected clones,5 clones were from superior individuals of provenance test stand,17 clones were from superior individuals of plus tree progeny test stand,49 clones were from superior individuals of seed orchard openpollinated progeny test stand,and the last were from superior clones of high production capacity of resin. By using these selected clones,8 hm2of seed orchard was established in 2008. This paper introduced key techniques on establishment of the 2ndgeneration seed orchard through aspects such as orchard materials selection,establishment technologies,tending technologies and tree shape managements.