The purpose of this study is to afford data on forest tending effect by understanding the effect of forest tending over growing environment and growth of forest tree. The subject of study is Artificial forest of 18∼34 -year-old nut pine which are at a stand where quantitative thinning was operated a...
The purpose of this study is to afford data on forest tending effect by understanding the effect of forest tending over growing environment and growth of forest tree. The subject of study is Artificial forest of 18∼34 -year-old nut pine which are at a stand where quantitative thinning was operated against around 50% of trees from year 2005 to 2009. The investigation includes growth of forest tree, soil moisture change; environmental change, clinical vegetation change, withering and crown length ratio change. According to the standard value of 2004, the study shows that annual tree growth amount of forest tending enforcement area has been increased to 142.9% in 2005, 127.4% in 2006 and 119.5% in 2007 compared to non-enforced area. The tree growth pattern of the forest tending enforcement area shows conspicuous increase in annual growth of tree and the effect is maximized in 3∼4 years and gradually been slowed down. The soil moisture change in rainy season shows that the average soil moisture content of non-enforced area is 40.4±8.97% while enforcement area is 43.0±4.64%, which showed relatively small difference. But in dry season, the average soil moisture content of non-enforced area is 20.4±4.09%, while enforcement area is 26.6±5.06%. This indicates that forest tending enforcement area has higher soil moisture content compared to non-enforced area and analyzed to have higher stability in preserving soil humidity. The vegetation changes in underlayer of the stand in total enumeration districts shows that 22 arbors (avg. 3.7±1.69 types), 15 herbages in non-enforced area while 37 arbors (avg. 8.7±1.57types), 37 herbages (avg. 7.0±1.73 type) in forest tending enforcement area, which indicates increment in diversity of species. As density of growing stock is decreased after forest tending work, the crown length ratio is conspicuously increased from 45.8% to 61.5% which activates perform of photosynthesis and gives major influence on tree increment. As a result, by forest tending work, the soil moisture content has been increased and more water is available for plants as the variation of percentage of water content is minimized. Also the amount of growth of forest tree is analyzed to be increased as the increase of crown length ratio activates perform of photosynthesis. Moreover, increase in understory vegetation will contribute to improve species diversity, and preserve healthy ecological system. In case of artificial forest of nut pine, the forest tending work is recommended to be done on a 5-year cycle, as the annual tree increment is maximized for 3∼4 years after forest tending work and gradually slowed down.
The purpose of this study is to afford data on forest tending effect by understanding the effect of forest tending over growing environment and growth of forest tree. The subject of study is Artificial forest of 18∼34 -year-old nut pine which are at a stand where quantitative thinning was operated against around 50% of trees from year 2005 to 2009. The investigation includes growth of forest tree, soil moisture change; environmental change, clinical vegetation change, withering and crown length ratio change. According to the standard value of 2004, the study shows that annual tree growth amount of forest tending enforcement area has been increased to 142.9% in 2005, 127.4% in 2006 and 119.5% in 2007 compared to non-enforced area. The tree growth pattern of the forest tending enforcement area shows conspicuous increase in annual growth of tree and the effect is maximized in 3∼4 years and gradually been slowed down. The soil moisture change in rainy season shows that the average soil moisture content of non-enforced area is 40.4±8.97% while enforcement area is 43.0±4.64%, which showed relatively small difference. But in dry season, the average soil moisture content of non-enforced area is 20.4±4.09%, while enforcement area is 26.6±5.06%. This indicates that forest tending enforcement area has higher soil moisture content compared to non-enforced area and analyzed to have higher stability in preserving soil humidity. The vegetation changes in underlayer of the stand in total enumeration districts shows that 22 arbors (avg. 3.7±1.69 types), 15 herbages in non-enforced area while 37 arbors (avg. 8.7±1.57types), 37 herbages (avg. 7.0±1.73 type) in forest tending enforcement area, which indicates increment in diversity of species. As density of growing stock is decreased after forest tending work, the crown length ratio is conspicuously increased from 45.8% to 61.5% which activates perform of photosynthesis and gives major influence on tree increment. As a result, by forest tending work, the soil moisture content has been increased and more water is available for plants as the variation of percentage of water content is minimized. Also the amount of growth of forest tree is analyzed to be increased as the increase of crown length ratio activates perform of photosynthesis. Moreover, increase in understory vegetation will contribute to improve species diversity, and preserve healthy ecological system. In case of artificial forest of nut pine, the forest tending work is recommended to be done on a 5-year cycle, as the annual tree increment is maximized for 3∼4 years after forest tending work and gradually slowed down.
주제어
#nut pine, forest tending, annual tree increment, soil moisture, understory vegetation, crown length ration
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