This study carried out to provide the objective and scientific indices for investigators and managers by analyzing the potential risk degree for old trees.
The result summarized is as follows;
1. It was investigated for Zelkova serrata(40 trees), Celtis sinensis(30 trees) and Gingo biloba(10...
This study carried out to provide the objective and scientific indices for investigators and managers by analyzing the potential risk degree for old trees.
The result summarized is as follows;
1. It was investigated for Zelkova serrata(40 trees), Celtis sinensis(30 trees) and Gingo biloba(10 trees) of old trees growing in Busan and Gyeongsangnam-do province. The average tree age of Gingo biloba was the highest as 360 years old as compared to Zelkova serrata(260 years old) and Celtis sinensi(270 years old).
2. It was set out in two items as growth conditions of aerial part of old tree and environmental conditions around the old tree ; inclination of tree shape, crack, cavity, dead branch, branch angle, pocket, decay parts, and covering space, facility, hardness, draining, light receiving status, invasion of other species, soil covering.
3. It showed to be good in the order of Zelkova serrata > Celtis sinensis > Gingo biloba in most factors of growth conditions of aerial part of old tree and environmental conditions around the old tree.
4. The values of Cambium Electrical Resistance(C.E.R) of Zelkova serrata were 57.3~83.3㏀(average 71.9㏀), those of Celtis sinensis and Gingo biloba were 57.0~87.9㏀(average 74.8㏀) and 67.0~93.1㏀(average 77.7㏀), respectively.
5. The results of internal tomography of stem of old trees showed to be healthy in order of Celtis sinensis > Zelkova serrata > Gingo biloba. It was the highest the rate of damage area in Gingo biloba.
6. The results analyzed the potential risk degree for growth condition of old trees were as follows ;
Individuals of Class V of Zelkova serrata were 13 trees, average girth 4.8m, and average height 16.9m. The rate of Class IV was the highest as 14 trees, and showed as 11 trees in Class III and 2 trees in Class II, but no in Class I.
Individuals of Class of Celtis sinensis V were 10 trees, average girth 5.3m, and average height 16.3m, and showed in Class IV as 9 trees, 8 trees in Class III and 3 trees in Class II, but no in Class I.
Individuals of Class IV of Gingo biloba were 2 trees, average girth 5.0m, and average height 15.0m, and showed in Class III as 6 trees and 2 trees in Class II, but no in Class I and V.
7. The results analyzed the potential risk degree based on value of Cambium Electrical Resistance of old trees were as follows ;
Individuals of Class IV of Zelkova serrata were 17 trees, average girth 4.9m, and average height 16.9m. It showed as 13 trees in Class III and 10 trees in Class II, but no in Class I and V.
Individual of Class V of Celtis sinensis was one tree, average girth 3.9m and average height 15.0m, and showed 17 trees in Class IV, 9 trees in Class III and 3 trees in Class II, but no in Class I.
Individual of Class V of Gingo biloba was one tree, average girth 4.9m, and average height 15.0m, and showed 5 trees in Class IV and 4 trees in Class III, but no in Class I and II.
8. The results analyzed the potential risk degree based on internal tomography of stem of old trees were as follows ;
Individuals of Class V of Zelkova serrata were 18 tree, average girth 4.8m, and average height 16.8m. It showed 4, 4, 4 and 10 trees in Class IV, III, II and I, respectively.
Individuals of Class V of Celtis sinensis were 21 trees, average girth 4.9m and average height 16.8m, and showed 2, 1, 2 and 4 trees in Class IV, III, II and I, respectively.
Individuals of Class V of Gingo biloba were 2 trees, average girth 4.8m, and average height 19.0m, and showed 1, 2 and 5 trees in Class IV, II and I, respectively, but no in Class III.
9. In the correlation between each factor for growth conditions of aerial part of old trees, it showed the positive correlation in all factors, and specially high between dead branches and pockets(r2 = 0.782) and between dead branches and decay parts(r2 = 0.865).
In the correlation among each factor for environmental conditions around old trees, it also showed the positive correlation in most factors, specially high between facility and draining(r2 = 0.802) and between soil covering and decay draining(r2 = 0.700), and negative correlation between covering space and invasion of other species, between draining and invasion of other species, between light receiving and invasion of other species, and between light receiving and soil covering.
10. In the correlation among growth condition, Value of Cambium Electric Resistance and internal tomography of stem of old trees, it showed the positive correlation in all 3 species of Zelkova serrata, Celtis sinensis and Gingo biloba and specially, high between Value of Cambium Electric Resistance and internal tomography of stem.
This study carried out to provide the objective and scientific indices for investigators and managers by analyzing the potential risk degree for old trees.
The result summarized is as follows;
1. It was investigated for Zelkova serrata(40 trees), Celtis sinensis(30 trees) and Gingo biloba(10 trees) of old trees growing in Busan and Gyeongsangnam-do province. The average tree age of Gingo biloba was the highest as 360 years old as compared to Zelkova serrata(260 years old) and Celtis sinensi(270 years old).
2. It was set out in two items as growth conditions of aerial part of old tree and environmental conditions around the old tree ; inclination of tree shape, crack, cavity, dead branch, branch angle, pocket, decay parts, and covering space, facility, hardness, draining, light receiving status, invasion of other species, soil covering.
3. It showed to be good in the order of Zelkova serrata > Celtis sinensis > Gingo biloba in most factors of growth conditions of aerial part of old tree and environmental conditions around the old tree.
4. The values of Cambium Electrical Resistance(C.E.R) of Zelkova serrata were 57.3~83.3㏀(average 71.9㏀), those of Celtis sinensis and Gingo biloba were 57.0~87.9㏀(average 74.8㏀) and 67.0~93.1㏀(average 77.7㏀), respectively.
5. The results of internal tomography of stem of old trees showed to be healthy in order of Celtis sinensis > Zelkova serrata > Gingo biloba. It was the highest the rate of damage area in Gingo biloba.
6. The results analyzed the potential risk degree for growth condition of old trees were as follows ;
Individuals of Class V of Zelkova serrata were 13 trees, average girth 4.8m, and average height 16.9m. The rate of Class IV was the highest as 14 trees, and showed as 11 trees in Class III and 2 trees in Class II, but no in Class I.
Individuals of Class of Celtis sinensis V were 10 trees, average girth 5.3m, and average height 16.3m, and showed in Class IV as 9 trees, 8 trees in Class III and 3 trees in Class II, but no in Class I.
Individuals of Class IV of Gingo biloba were 2 trees, average girth 5.0m, and average height 15.0m, and showed in Class III as 6 trees and 2 trees in Class II, but no in Class I and V.
7. The results analyzed the potential risk degree based on value of Cambium Electrical Resistance of old trees were as follows ;
Individuals of Class IV of Zelkova serrata were 17 trees, average girth 4.9m, and average height 16.9m. It showed as 13 trees in Class III and 10 trees in Class II, but no in Class I and V.
Individual of Class V of Celtis sinensis was one tree, average girth 3.9m and average height 15.0m, and showed 17 trees in Class IV, 9 trees in Class III and 3 trees in Class II, but no in Class I.
Individual of Class V of Gingo biloba was one tree, average girth 4.9m, and average height 15.0m, and showed 5 trees in Class IV and 4 trees in Class III, but no in Class I and II.
8. The results analyzed the potential risk degree based on internal tomography of stem of old trees were as follows ;
Individuals of Class V of Zelkova serrata were 18 tree, average girth 4.8m, and average height 16.8m. It showed 4, 4, 4 and 10 trees in Class IV, III, II and I, respectively.
Individuals of Class V of Celtis sinensis were 21 trees, average girth 4.9m and average height 16.8m, and showed 2, 1, 2 and 4 trees in Class IV, III, II and I, respectively.
Individuals of Class V of Gingo biloba were 2 trees, average girth 4.8m, and average height 19.0m, and showed 1, 2 and 5 trees in Class IV, II and I, respectively, but no in Class III.
9. In the correlation between each factor for growth conditions of aerial part of old trees, it showed the positive correlation in all factors, and specially high between dead branches and pockets(r2 = 0.782) and between dead branches and decay parts(r2 = 0.865).
In the correlation among each factor for environmental conditions around old trees, it also showed the positive correlation in most factors, specially high between facility and draining(r2 = 0.802) and between soil covering and decay draining(r2 = 0.700), and negative correlation between covering space and invasion of other species, between draining and invasion of other species, between light receiving and invasion of other species, and between light receiving and soil covering.
10. In the correlation among growth condition, Value of Cambium Electric Resistance and internal tomography of stem of old trees, it showed the positive correlation in all 3 species of Zelkova serrata, Celtis sinensis and Gingo biloba and specially, high between Value of Cambium Electric Resistance and internal tomography of stem.
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