Table 2 Main characteristics of the 7 spruce and 5 Douglas fir trees. Tree age (number of annual rings at 125-cm height), trunk diameter at 130-cm height, number of inserted electrodes, moisture content (MC), and electrical resistivity (ER; mean ± SE) parameters. Mean data of each species are given with the SD
Forest | Tree | Age (years) | Diameter (cm) | Number of electrodes | ERmean 31/07-02/08/2018 (Ωm) | Mean sapwood MC (%) | Mean heartwood MC (%) | Mean total MC (%) |
|---|---|---|---|---|---|---|---|---|
Spruce 1 | 51 | 41.4 | 20 | 1196.2 ± 17.5 | 111.3 | 35.7 | 58.0 | |
Spruce 2 | 54 | 57.3 | 24 | 723.7 ± 4.6 | 117.4 | 31.8 | 46.5 | |
Spruce 3 | 49 | 44.2 | 20 | 779.0 ± 4.0 | 102.5 | 31.1 | 43.7 | |
Spruce 4 | 51 | 53.5 | 24 | 670.0 ± 2.5 | 112.9 | 34.8 | 53.8 | |
Spruce 5 | 66 | 64.9 | 24 | 939.1 ± 10.4 | 131.5 | 33.4 | 59.4 | |
Spruce 6 | 60 | 62.4 | 24 | 1149.9 ± 12.7 | 107.9 | 29.0 | 40.6 | |
Saint-Germain | Spruce 7 | 84 | 47.1 | 24 | 890.2 ± 7.0 | 98.7 | 28.2 | 47.4 |
Mean | 59.3 ± 12.4 | 53.0 ± 9.1 | 22.9 ± 2.0 | 906.9 ± 204.2 | 111.7 ± 10.8 | 32.0 ± 2.8 | 49.9 ± 7.2 | |
Saint-Germain | Douglas 1 | 88 | 65.9 | 24 | 1379.6 ± 8.7 | 124.2 | 31.3 | 49.9 |
Douglas 2 | 89 | 66.8 | 24 | 1525.9 ± 11.8 | 96.1 | 32.2 | 43.8 | |
Douglas 3 | 89 | 73.2 | 24 | 1183.4 ± 8.1 | 111.3 | 33.4 | 60.2 | |
Douglas 4 | 88 | 65 | 3 24 | 1262.1 ± 3.8 | 87.3 | 29.3 | 40.2 | |
Douglas 5 | 87 | 60.5 | 24 | 1387.7 ± 11.6 | 115.2 | 30.7 | 46.0 | |
Mean | 88.2 ± 0.8 | 66.3 ± 4.6 | 24.0 ± 0.0 | 1347.8 ± 131.0 | 106.8 ± 14.9 | 31.4 ± 1.5 | 48.0 ± 7.6 |