Study on establishment technology and seed setting habit of Pinus massoniana seed stand

The successive 7-year observation on seed setting habit for Pinus massoniana seed stand was carried out, results show: (1) Flowering period ranged from 10 to 15 days, but the flowering period of male and female strobilus are overlapped; (2) There is a positive relationship between cone and seed production and female strobilus production, but no obvious relationship between the seed production and the amount of male strobilus production; (3) Seed stand at the beginning of establishment can be thinned, it is optimal that stand density at the age of 7 years old is 330 trees per hm2; (4) More than 80% of the trees in the seed stand bear female and male strobili at the age of 7 years old, 80% of the male and female strobili are mainly borne facing the southeast in the middle and lower part of crown, 8.7 kg seeds can be produced per hm2 at the age of 10 years old.