Differences in β-thujaplicin content of wood between plantation- and naturally grown Thujopsis dolabrata var. hondae (hinokiasunaro) trees in Shimokita Peninsula, Aomori, Japan

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Statistical values for annual ring number, radius, acetone extractives and β-thujaplicin contents in sample trees

Stand	Annual ring number		Radius (cm)		Acetone extractives content (mg/g)		β-Thujaplicin content (mg/g)
Stand	Mean	CV (%)	Mean	CV (%)	Mean	CV (%)	Mean	CV (%)
Natural
A	163.6	21.8	18.4	30.4	18.92	24.5	1.01	57.4
(n = 9)	(125–240)		(10.9–29.1)		(12.06–26.33)		(0.50–2.49)
B	145.5	24.5	15.0	28.7	17.80	13.8	0.71	52.1
(n = 10)	(84–225)		(9.8–25.5)		(13.93–21.38)		(0.29–1.28)
Plantation
P	79.0	10.9	14.4	23.3	19.84	29.7	1.64	61.0
(n = 10)	(62–87)		(8.6–20.3)		(10.92–29.53)		(0.33–3.67)
All	128.2	36.3	15.8	29.7	18.85	23.9	1.12	70.5
All	(62–240)		(8.6–29.1)		(10.92–29.53)		(0.29–3.67)
t-test	**		ns		ns			*

Values in parentheses are minimum and maximum values
n, number of sample trees; CV, coefficient of variation
**, *, and ns indicate significant differences (p < 0.01 and p < 0.05) and no significant difference (p > 0.05) between the stands by the t-test, respectively. The t-test was conducted to detect the differences between natural (combined data of stands A and B) and plantation stands