It was analyzed the tree healthy degree by analysis of electric resistance, damage rate of the insects, soil physical-chemical properties, and tree ring widths in the tended forests in order to analyze the effect on the tree healthy after forest tending practice. The results obtained are as follows ...
It was analyzed the tree healthy degree by analysis of electric resistance, damage rate of the insects, soil physical-chemical properties, and tree ring widths in the tended forests in order to analyze the effect on the tree healthy after forest tending practice. The results obtained are as follows ; 1. There was the difference of tree healthy degree of 1.0cm(DBH), 0.2m(tree height), -0.5kΩ(electric resistance value) and 4.5cm(amount of new shoot growth) between forest tending practice and control area after a year in forest tending practice area, respectively. There was the difference of 1.0cm(DBH), 1.0m(tree height), -10.2kΩ(electric resistance value) and 11.5cm(amount of new shoot growth) between forest tending practice area and control area after 4 years in forest tending practice area, respectively. It showed the difference of tree healthy degree from after 3 years in forest tending practice area. 2. It was decreased to 4.1%(after a year and 2 years), 5.5%(after 3 years) and 8.5%(4 years) of the rate of damage of pine needle gall midge, respectively in forest tending practice area in comparison with control area. 3. It did not show much difference in soil physical properties but was generally increased of soil chemical properties of O.M, T-N, Av. P2O5 and CEC in forest tending practice area. 4. It was generally increased of the ingredients in pine needles of T-N, Av.P2O5, K+, Ca2+, Mg2+ after forest tending practice. 5. There was not much difference from 2000 to 2006 before forest tending practice but it was increased to 0.32mm(after 2 years), 0.6mm(after 3 years) and 0.8mm(after 4 years) after forest tending practice, respectively.
It was analyzed the tree healthy degree by analysis of electric resistance, damage rate of the insects, soil physical-chemical properties, and tree ring widths in the tended forests in order to analyze the effect on the tree healthy after forest tending practice. The results obtained are as follows ; 1. There was the difference of tree healthy degree of 1.0cm(DBH), 0.2m(tree height), -0.5kΩ(electric resistance value) and 4.5cm(amount of new shoot growth) between forest tending practice and control area after a year in forest tending practice area, respectively. There was the difference of 1.0cm(DBH), 1.0m(tree height), -10.2kΩ(electric resistance value) and 11.5cm(amount of new shoot growth) between forest tending practice area and control area after 4 years in forest tending practice area, respectively. It showed the difference of tree healthy degree from after 3 years in forest tending practice area. 2. It was decreased to 4.1%(after a year and 2 years), 5.5%(after 3 years) and 8.5%(4 years) of the rate of damage of pine needle gall midge, respectively in forest tending practice area in comparison with control area. 3. It did not show much difference in soil physical properties but was generally increased of soil chemical properties of O.M, T-N, Av. P2O5 and CEC in forest tending practice area. 4. It was generally increased of the ingredients in pine needles of T-N, Av.P2O5, K+, Ca2+, Mg2+ after forest tending practice. 5. There was not much difference from 2000 to 2006 before forest tending practice but it was increased to 0.32mm(after 2 years), 0.6mm(after 3 years) and 0.8mm(after 4 years) after forest tending practice, respectively.
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