Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Influences of Timber Harvesting Methods on Soil Disturbance

임목생산방법에 따른 토양교란 영향 평가

  • Lee, Eunjai (Department of Forest Sciences, Seoul National University) ;
  • Li, Qiwen (Department of Forest Sciences, Seoul National University) ;
  • Eu, Song (Department of Forest Sciences, Seoul National University) ;
  • Han, Sang-Kyun (Department of Forestry and Landscape Architecture, Korea National College of Agriculture and Fisheries) ;
  • Im, Sangjun (Department of Forest Sciences, Seoul National University)
  • 이은재 (서울대학교 산림과학부) ;
  • ;
  • 유송 (서울대학교 산림과학부) ;
  • 한상균 (한국농수산대학 산림조경학과) ;
  • 임상준 (서울대학교 산림과학부)
  • Received : 2017.03.16
  • Accepted : 2017.04.27
  • Published : 2017.06.30
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Abstract

Soil disturbance caused by timber harvesting is widely recognized as a potential threat to forest utilization. The degree and extent of soil disturbance is believed to vary with respect to harvesting methods and logging machines. This study has conducted to assess the degree of soil disturbance associated with ground-based cut-to-length (GC) and cable yarding with whole tree (CW) harvesting methods. Soil disturbance was classified using a visual assessment of harvest unit. The properties of soils in different disturbance levels were also evaluated to understand the influence of timber harvesting on soil structure with soil core sampling method. The deep disturbance and soil compaction were observed in sites by 48% and 23% through harvesting areas for GC and CW logging methods, respectively. The results showed that logging machine and number of machine passage had significant influences on soil bulk density and porosity. Soil disturbance types such as rutted, slash cover, and compact were influenced by equipment travel trends in a GC method.

중장비를 이용한 임목생산작업은 산림 내 토양교란을 유발하며, 산림토양은 토양침식에 취약한 구조를 가지게 된다. 임목생산방법 및 장비에 따라 토양교란 유형 및 토성 변화 정도는 다르게 나타난다. 따라서 이 연구에서는 국내에서 이루어지고 있는 우드그랩을 이용한 단목생산방법과 스윙야더를 이용한 전목생산방법에 따른 토양교란 영향을 평가하였다. 이를 위하여 토양교란 유형은 시각적 평가방법을 이용하여 분류하였으며, 교란 유형에 따른 토양의 물리성 변화는 토양시료캔에 의한 샘플링 방법을 이용하였다. 단목과 전목생산작업지에서 관찰된 극심한 교란(deep disturbance)과 토양답압(compacted) 유형은 각각 48%와 23%로 나타났다. 또한, 임목생산작업에 따른 토양의 물리성 변화는 중장비 차량이 통행한 곳에서 차이가 발생하였다. 반면 차량 통행과 관련 없는 토양교란 유형에서는 임목수확작업 전 후의 토양의 용적밀도 및 공극률은 통계적으로 차이가 없었다. 이 연구를 통해 산림 내에서 중장비의 통행으로 인하여 주로 토양 교란 및 훼손이 발생함을 알 수 있었다.

Keywords

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