間伐이 일본잎갈나무의 直徑成長에 미치는 影響 : Larix leptolepis Gordon = Effects of Thinning on Diameter Growth of Japanese larch

국문 초록 (Abstract)

本 硏究는 일본잎갈나무人工林에서 間伐이 일본잎갈나무의 直徑成長에 어떤 影響을 미쳤는 가를 調査한 것이다. 그 結果를 要約하면 다음과 같다.
1. 間伐區(B)와 無間伐(A)는 幼齡林分에서는 거의 비슷한 成長을 하였으나 11年以後부터 平均年輪幅과 年輪의 平均斷面積이 無間伐區보다 間伐區가 急進的으로 增加된 것으로 보아 11年에 間伐이 實施된 것으로 사료된다.
2. 間伐區는 無間伐區보다 平均年輪幅은 約 1.4倍로, 年輪의 平均斷面績은 約 1.5倍로, 年輪의 累加斷面積은 約 1.8倍로 成長하였으므로 間伐이 일본잎갈나무 直徑成長에 크게 影響한 것으로 생각된다.

다국어 초록 (Multilingual Abstract)

This study was carried out to determine the effect of thinning on the diameter growth of the artificial forest of Japanese larch (Larix leptolepis Gordon)
The results obtained were as follows:
1. The thinning plot (B) and non thinning plot (A) were shown growth rate of both similarly is brush stage, but since after 11 years the thinned plot was shown more increment than unthinned plot about the average annual ring width and average cross­sectional area of annual ring. Therefore I conclude that may be better thinned at 11 years.
2. The thinning plot was shown growth rate of 1.4 times of average annual ring width, 1.5 times of average cross section of annual ring and 1.8 times of accumulated cross section area related to tree age than the non thinning plot.
It was assumed that this tendency would be caused by the thinning.