임분 피해특성에 따른 지역별 졸참나무의 물리·역학적 특성
Mechanical and Physical Wood Properties of Quercus serrata due to Damaged Stands in Southern Region of Korea
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초록
경상도, 전라도와 제주도 삼나무 임지에 대하여 임분 내 임분피해특성과 역학적 특성들 간의 상관관계를 분석하고 피해목 발생량을 조사하였다. 임분피해특성 샘플을 정상목, 변색목, 동공, 수간부 굴곡 그리고 상처로 구분하여 표준지에서 채취하였다. 각 샘플의 물리 및 역학적 특성을 분석한결과, 압축강도 값은 정상목, 부후목, 변색목, 동공, 수간부굴곡, 상처에서 각각 53.22, 40.63,54.14, 51.65, 59.11, 51.87 Mpa 이었고 평균전단강도 값은 15.65, 12.10, 15.51, 15.47, 16.69,14.57 Mpa이었다. 부후목의 압축 및 전단강도는 정상목 보다 각각 24%, 23% 감소하였지만 다른임분 피해요소의 큰 차이는 없었다. 부후목 발생량은 경상남도, 전라도, 제주도에서 각각 16.39,9.09, 10.00%이었다.
Abstract
Quercus serrata can be useful for utilization of forest resources corresponding to climatechange in warm temperate forest area. The relationships between wood properties and damageproperties in standing growth for Quercus serrata stands in Gyeongsangnam-do Province,Jeollanam-do Province and Je-ju island were analyzed and the amount of damaged-woodappearance was investigated. The sample in damaged stands was obtained for the analysis ofsound wood, discoloration wood, decomposed wood, tree hole, stem flexion and scratch onsample plots. From these samples, compression strength and shear strength were measured. The mean values of compression strength were 53.22, 40.63, 54.14, 51.65, 59.11, and 51.87Mpa and shear strength were 15.65, 12.10, 15.51, 15.47, 16.69, and 14.57Mpa, respectivelyfor sound wood, discoloration wood, decomposed wood, tree hole, stem flexion and scratch,respectively. Compression strength and shear strength of decomposed wood is 24% lower than that in sound wood, respectively. However, There were no significant differences between other factors. The percentages of damaged-wood appearance were 16.39, 9.09, and 10%,respectively for Gyeongsangnam-do Province, Jeollanam-do Province, and Je-ju island.
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