본 연구는 고로쇠나무에 대해 천연림과 인공림에서의 생육환경과 생장특성을 비교ㆍ분석하여 인공조림 시 식재밀도에 관련하는 생장인자의 선정과 산림경영을 통해 수액을 생산하여 소득을 얻을 수 있는 연수를 추정하기 위해 수행되었다. 임분 유형별 토양특성은 천연림에서 인공림에 비해 유기물함량, 전질소, 유효인산이 전반적으로 높게 나타났다. 천연림과 인공림에서 통계적 유의성이 높은 흉고직경과 수관폭, 수관면적을 이용하 여 선형회귀식을 산출하였다. 흉고직경과 수관폭은 천연림에서 y = 0.1708x + 2.972(R2=0.5996), 인공림에서 y = 0.2275x + 2.5195(R2 = 0.4024) 로 나타났다. 흉고직경과 수관면적은 천연림에서 y = 1.1504x - 1.665(R2 = 0.6406), 인공림에서 y = 1.0084x + 1.123(R2 = 0.4589)로 나타났다. 임분 유형별로 연평균생장량은 천연림에서 2.4mm, 인공림에서 3.8mm로 통계적으로 유의한 차이를 보이며 인공림에서 약 1.6배 더 높게 나타났다(p < 0.0001). 임분별 초기 5년과 10년 동안의 연륜생장량 또한 인공림에서 높게 분석되었다. 천연림과 인공림에서 연륜 증가에 따른 흉고직경 생장을 조사해 본 결과 흉고직경 10㎝ 크기로 도달되는 연수는 천연림은 22년, 인공림에서는 13년이 소요되는 것으로 분석되었다. 이와 같은 결과는 고로쇠나무의 자원조성 및 대체갱신 조림 시 식재 후 생장 예측과 산림경영을 위한 수익성 분석의 기초 자료로 활용할 수 있을 것으로 판단된다.

This study was conducted to estimate the age of Acer pictum subsp. mono at which profits can be generated by producing and collecting its sap through the selection of growth and development factors and forest management related to the planting density of the trees at the time of the establishment of artificial afforestation by comparatively analyzing the growth characteristics and development environment of Acer pictum subsp. mono in natural and artificial forests. The soil characteristics for each stand type displayed higher contents of organic matter, total nitrogen, and available phosphate in overall in the natural forest in comparison to the artificial forest. The linear regression equation was formulated by using diameter at breast height, width of crown, and crown area with a high level of statistical significance in the natural and artificial forests. The diameter at breast height and width of crown in the natural forest were found to be y=0.1708x+2.972 (R2=0.5996) and y=0.2275x+2.5195 (R2=0.4024) in the artificial forest, while the diameter at breast height and crown area in the natural forest were found to be y=1.1504x-1.665 (R2=0.6406) and y=1.0084x+1.123 (R2=0.4589) in the artificial forest. Annual growths and developments for each stand type were 2.4mm and 3.8mm in the natural forest and the artificial forest, respectively, thereby illustrating statistically significant differences with approximately 1.6 times higher levels in the artificial forest (p<0.0001). Annual growth and development rates in the initial 5 and 10 years for each stand type were also analyzed to be higher in the artificial forest. As the result of the growth and development of diameter at breast height in accordance with the annual increase in the natural forest and the artificial forest, the ages taken to reach 10cm in the diameter at breast height were 22 and 13 years, respectively, for the natural forest and the artificial forest. It is deemed that these results can be utilized as basic data for the analysis of profitability in the forest management as well as in the prediction of the growth and development in the establishment of Acer pictum subsp. mono resources and at the time of substitute renewal afforestation.

초록
Abstract
서론
재료 및 방법
    1. 천연림 및 인공림 조사지 개황
    2. 조사지 토양이화학적 특성
    3. 임분별 생장특성 및 연륜 분석
    4. 통계분석
결과 및 고찰
    1. 임분별 토양의 물리⋅화학적 특성
    2. 임분유형별 생장특성
    3. 임분유형별 생장인자 상관분석
    4. 임분유형별 연륜생장 및 수액채취 가능 연수 추정
References

• 윤준혁(국립산림과학원 산림바이오소재연구소) | Jun-Hyuck Yoon (Forest Biomaterials Research Center, National Institute of Forest Science) Corresponding author
• 배은지(국립산림과학원 산림바이오소재연구소) | Eun-Ji Bae (Forest Biomaterials Research Center, National Institute of Forest Science)
• 진언주(국립산림과학원 산림바이오소재연구소) | Eon-Ju Jin (Forest Biomaterials Research Center, National Institute of Forest Science)
• 성창현(국립산림과학원 산림바이오소재연구소) | Chang-Hyun Sung (Forest Biomaterials Research Center, National Institute of Forest Science)