Effects of Age and Stand Density of Mother Trees on Early Pinus thunbergii Seedling Establishment in the Coastal Zone, China

Table 1

Mother tree characteristics of Pinus thunbergii for collecting cones and seeds.

Age class	D I		D II
	Diameter at breast height (cm)	Height of mother tree (m)	Diameter at breast height (cm)	Height of mother tree (m)
M I	9.55~12.74	6.1~7.3	6.37~9.55	5.6~6.4
M II	12.89~15.92	6.5~9.2	10.51~12.74	6.4~8.6
M III	16.56~19.11	6.8~9.8	12.89~15.92	6.3~8.6