소나무림의 생태적 특성에 미치는 위생간벌의 영향
Effect of Health-Thinning on Ecological Characteristics of Pinus densiflora Stand
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초록
본 연구는 소나무림의 효율적 관리를 위한 기초정보를 제공하기 위하여 수행되었다. 토양수분함량과전질소 함량은 유의적인 차이는 나타나지 않았지만 위생간벌지가 대조구에 비해 조금 높게 나타났다. 토양 pH, 유기물 함량, 유효인산, 치환성양이온은 위생간벌지와 대조구 간에 유의적인 차이(p<0.05)가나타났다. 층위별 중요치 분석 결과, 곰솔, 개옻나무, 때죽나무가 위생간벌지의 교목층, 아교목층, 관목층에서 상대적으로 높은 중요치를 보였으며, 대조구에서는 교목층과 아교목층에서 소나무, 관목층에서 개옻나무의 중요치가 높게 나타났다. 종다양도는 위생간벌지에서 0.481~1.367, 대조구에서 0.828~1.415의범위에 있었으며, 균재도는 위생간벌지와 대조구에서 각각 0.570~0.868, 0.673~0.989인 것으로 분석되었다. 주요 수종의 경급 분포는 위생간벌지의 경우 정규분포, 대조구에서는 경급이 작은 계급에 많은개체수가 나타났다. 흉고직경과 관련하여 소나무의 수고생장은 동일한 직경급에서 위생간벌지에서의 수고생장이 더 양호한 것으로 나타났다. 위생간벌지에서의 소나무 연륜생장량은 시간이 경과함에 따라 대조구보다 더 중요하는 것으로 나타났다.
Abstract
The purpose of this study was to offer basic data for efficient management of Pinus densiflora stand. Even though the difference was not significant, soil moisture content and total N content at the health-thinned sites were higher than those of the control. Soil pH, organic matter content, available P and CEC were significantly different between the health-thinned and the control (p<0.05). Pinus thunbergii, Styrax japonicus and Rhus trichocarpa had higher was higher importance value for tree, subtree and shrub layer at the health-thinned sites P. densiflora for tree and subtree layer and R. trichocarpa for shrub layer was high. The species diversity ranged from 0.481 to 1.367 at the health-thinned sites and 0.828 to 1.415 at the control. Evenness was 0.570~0.868 and 0.673~0.989 at the health-thinned and control, respectively. DBH class of major three species showed normal distribution at the health-thinned sites, while the distribution at the control consisted of many individuals of the lower class. In relation to DBH and height growth of P. densiflora, height growth at the health-thinned site was relatively better than that of the control at same diameter class. The average annual growth rate over time increased at the health-thinned sites.
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