Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
권호 표지

Inhibitory Factors of Robinia pseudoacacia Distribution in a Pinus thunbergii Forest at the Coast

해안 곰솔림 내 아까시나무의 분포확대 억제요인

  • 정성철 (국립산림과학원 산림방재연구과) ;
  • 구교상 (국립산림과학원 산림방재연구과) ;
  • 김경하 (국립산림과학원 산림방재연구과)
  • Received : 2011.03.07
  • Accepted : 2011.10.06
  • Published : 2011.10.31
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Abstract

The objectives of this study were to analyze environment in the forest and growth characteristics for investigating the characteristics of Robinia pseudoacacia distribution in a Pinus thunbergii forest at the coast. As a result of analyzing inhibitory factors of Robinia pseudoacacia distribution in a Pinus thunbergii forest at the coast, it is considered that the salt level included in a sea wind is supposed to be the primary factor of the slow growth for Robinia pseudoacacia since brown leaves, wilting and early leaf fall have appeared in the 0m spot from the artificial dune which has the high salt level. However, the soil properties and light environment hardly have a effect on the growth of Robinia pseudoacacia because there is no difference among planting places. Also, the growth ring of the horizontal root in 2year individuals 0.1~0.2m away from the dune have been formed for 1 year only as a consequence of analyzing growth rings of Robinia pseudoacacia growing on the coast. It can be infered that the nourishment of the horizontal root from individuals growing on the coast have been provided for the first 1 year only. It is estimated that, in case of the nearby areas on the coast, it is not enough to provided nourishment to the horizontal root due to obstructing the growth of new individuals by a sea wind, so the growth of the horizontal root would be hampered. Therefore, it is considered that impedient Robinia pseudoacacia distribution in a Pinus thunbergii forest at the coast is caused by making no growth of new horizontal roots and newborn individuals.

본 연구는 해안 곰솔림에 생육하고 있는 아까시나무의 분포특성을 결정하는 요인을 구명하기 위하여 아까시나무의 생장특성과 임내 환경을 조사 분석하였다. 해안 곰솔림 내에 분포하고 있는 아까시나무의 분포확대 억제요인을 분석한 결과, 염분농도가 높은 0m 지점에서 잎의 갈변, 위조, 조기낙엽 현상이 나타나 염분이 아까시나무의 생장억제에 큰 영향을 미치는 요인으로 추정되었다. 그러나 토양특성과 광환경은 식재지점간의 차이는 나타나지 않아 아까시나무의 생장에 있어 큰 영향을 주지 않는 것으로 추정되었다. 또한 해안측에 생장하고 있는 아까시나무의 수평근 연륜분석 결과, 2년생 개체의 근주에서 0.1~0.2m 떨어진 수평근 연륜에서도 1년 밖에 형성되지 않아 아까시나무의 수평근으로 영양공급이 충분하게 이루어지지 않아 수평근의 신장을 억제하는 것으로 추정되었다. 따라서 새로운 수평근의 신장과 개체의 신생이 이루어지지 않아 해안측으로 아까시나무의 분포확대가 억제되는 것으로 사료되었다.

Keywords

References

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