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Official Journal of the Japan Wood Research Society

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

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

Stand Annual ring number Radius (cm) Acetone extractives content (mg/g) β-Thujaplicin content (mg/g)
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
(62–240) (8.6–29.1) (10.92–29.53) (0.29–3.67)
t-test **   ns   ns    *
  1. Values in parentheses are minimum and maximum values
  2. n, number of sample trees; CV, coefficient of variation
  3. **, *, 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