Seasonal variations of tracheid formation and amount of auxin (IAA) and gibberellin A4 (GA4) in cambial-region tissues of mature sugi (Cryptomeria japonica) cultivar grown in a Nelder plot with different tree densities

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Initial tree densities and growth traits of sample trees

Symbol	Density (trees/ha)	Age	n	H (m)	DBH (cm)	HCB (m)	H/D ratio (%)
D	4823	38	3	17.0 (2.0)^a	22.1 (6.1)^a	11.5 (1.1)^b	79.7 (14.0)^b
E	3349	38	3	18.8 (1.4)^a	27.9 (4.0)^ab	11.8 (1.4)^b	68.0 (5.7)^ab
G	1615	38	3	17.5 (2.1)^a	25.8 (4.2)^ab	11.1 (1.1)^b	68.3 (6.9)^ab
H	1122	38	3	18.5 (3.4)^a	34.0 (11.8)^ab	9.3 (1.5)^ab	57.0 (12.0)^ab
J	541	38	3	20.3 (3.8)^a	47.5 (12.3)^b	5.4 (2.0)^a	43.4 (4.3)^a

The values represent averages in three trees; values in parentheses indicate standard deviations. Different characters show significant differences among density-zoning symbols (p < 0.05)
Symbol tree-density-zoning symbol, Density initial tree density, n number of sample trees, H tree height, DBH diameter at breast height, HCB height at crown base, H/D ratio height-to-diameter ratio