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Figure 9.
Overview of damage results in the studied plots_
| No. of the research plot | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | Average value | Standard Deviation/Standard Error | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of appraised trees, pcs | in the area | 150 | 231 | 320 | 278 | 351 | 254 | 410 | 389 | 154 | 279 | 201 | 274.27 | 87.84/26.50 |
| per 1ha | 187.5 | 256.7 | 320.0 | 278.0 | 390.0 | 362.9 | 410.0 | 389.0 | 256.7 | 279.0 | 335.0 | 314.98 | 69.69/21.02 | |
| Number of damaged trees, pcs | in the area | 16 | 35 | 26 | 24 | 35 | 26 | 32 | 35 | 21 | 14 | 16 | 25.45 | 7.97/2.40 |
| per 1ha | 20.0 | 38.9 | 26.0 | 24.0 | 38.9 | 37.1 | 32.0 | 35.0 | 35.0 | 14.0 | 26.7 | 29.78 | 8.25/2.49 | |
| Damage intensity, % | 10.67 | 15.15 | 8.13 | 8.63 | 9.97 | 10.24 | 7.80 | 9.00 | 13.64 | 5.02 | 7.96 | 9.28 | 2.81/0.85 | |
Proportion of damaged trees depending on the location and severity of damage_
| No. of the research plot | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | Average value | Standard deviation/standard error |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Location of damage | |||||||||||||
| Trunk and root collar | 75.0 | 71.5 | 80.8 | 75.0 | 68.6 | 71.4 | 65.6 | 80.0 | 71.4 | 78.6 | 74.9 | 74.75 | 4.83/1.46 |
| Roots | 25.0 | 28.5 | 19.2 | 25.0 | 31.4 | 28.6 | 34.4 | 20.0 | 28.6 | 21.4 | 25.1 | 25.25 | 4.83/1.46 |
| Degree of damage | |||||||||||||
| The outer layer of bark is damaged | 3.8 | 19.0 | 12.5 | 25.0 | 17.1 | 7.7 | 6.3 | 37.5 | 22.9 | 28.6 | 28.6 | 19.00 | 11.37/3.43 |
| Complete destruction of the bark without damage to the wood | 34.6 | 57.1 | 43.8 | 41.7 | 40.0 | 23.1 | 37.5 | 43.8 | 51.4 | 57.1 | 42.9 | 43.00 | 10.57/3.19 |
| The wood is damaged | 61.5 | 23.8 | 43.8 | 33.3 | 42.9 | 69.2 | 56.3 | 18.8 | 25.7 | 14.3 | 28.6 | 38.00 | 17.06/5.14 |
| The distribution share of damage by wound size | |||||||||||||
| up to 10 cm2 | 15.4 | 47.6 | 18.8 | 29.2 | 22.9 | 11.5 | 15.6 | 37.5 | 34.3 | 42.9 | 40.0 | 28.70 | 12.60/3.80 |
| 11 to 100 cm2 | 30.8 | 38.1 | 37.5 | 50.0 | 37.1 | 38.5 | 37.5 | 56.3 | 51.4 | 42.9 | 51.4 | 42.85 | 8.75/2.64 |
| more than 100 cm2 | 53.8 | 14.3 | 43.8 | 20.8 | 40.0 | 50.0 | 46.9 | 6.3 | 14.3 | 14.3 | 8.6 | 28.45 | 17.90/5.40 |
| Proportion of damaged trees depending on the distance from the skid trail | |||||||||||||
| up to 1 m | 57.7 | 23.8 | 62.5 | 22.9 | 45.7 | 76.9 | 46.9 | 12.4 | 33.2 | 28.6 | 22.9 | 39.40 | 20.23/5.84 |
| 1 to 5 m | 23.1 | 71.4 | 25.1 | 57.1 | 22.9 | 19.2 | 21.9 | 62.4 | 33.2 | 36.0 | 42.9 | 37.75 | 18.98/5.48 |
| more than 5 m | 19.2 | 4.8 | 12.4 | 20.1 | 31.4 | 3.9 | 31.3 | 24.7 | 33.2 | 36.0 | 34.3 | 22.85 | 11.56/3.34 |
Characteristics of the research object_
| No. of the research plot | Location | Area, ha | Year of felling | Harvestable volume, m3 | ||||
|---|---|---|---|---|---|---|---|---|
| Forestry district | Forest range | Forest compartment | Forest subcompartment | total | per ha | |||
| 1 | Vygoda | Shevchenkivske | 15 | 33.4 | 0.8 | 2023 | 174 | 217.5 |
| 2 | Vygoda | Shevchenkivske | 15 | 33.5 | 0.9 | 2023 | 86 | 95.6 |
| 3 | Vygoda | Shevchenkivske | 26 | 14.0 | 1.0 | 2023 | 190 | 190.0 |
| 4 | Vygoda | Slobidske | 10 | 13.2 | 1.0 | 2023 | 110 | 110.0 |
| 5 | Vygoda | Slobidske | 23 | 12.1 | 0.9 | 2023 | 111 | 123.3 |
| 6 | Broshnivske | Lypovetske | 40 | 23.2 | 0.7 | 2023 | 178 | 254.3 |
| 7 | Vygoda | Slobidske | 23 | 27.4 | 1.0 | 2024 | 131 | 131.0 |
| 8 | Broshnivske | Luhivske | 4 | 1.0 | 1.0 | 2024 | 70 | 70.0 |
| 9 | Osmolodske | Perehinske | 25 | 1.0 | 0.6 | 2024 | 66 | 110.0 |
| 10 | Osmolodske | Perehinske | 17 | 6.2 | 1.0 | 2024 | 48 | 48.0 |
| 11 | Osmolodske | Perehinske | 23 | 14.4 | 0.6 | 2024 | 63 | 105.0 |