• 제목/요약/키워드: Research Forest

검색결과 7,241건 처리시간 0.039초

Implementation of the virtual reforestation system using spatial data

  • Kim Sung-Jae;Jo Myung-Hee;Kim Joon-Bum;Lee Myung-Bo;Lim Joo-Hoon
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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    • pp.77-80
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    • 2004
  • In this study the spatial distribution characters of burnt forest site was first considered by analyzing spatial data and monitoring forest landscape before/after lire to restore the site. Then suitable tree species on each forest site should be selected through the weighted score analysis of GIS analysis methods. Finally. the best forest stand arrangement method could be simulated on the system for the advanced reforestation technology in Korea. For this purpose, the virtual reforestation system was implemented by using the concept of virtual GIS and CBD (Component Based Development) method. By use of this system the change of forest landscape of burnt forest area some years after reforestation practice could be detected and monitored by applying the site index and 3D modeling method.

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설악산 잣나무(Pinus koraiensis) 천연림의 해발고별 임분구조 및 생장특성 (Stand Structure and Growth Characteristics at Different Elevations of the Korean Pine(Pinus koraiensis) Natural Forest on Mt. Seorak)

  • 김현섭;배상원;장석창;정준모
    • Journal of Forest and Environmental Science
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    • 제27권3호
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    • pp.157-167
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    • 2011
  • This study was conducted to analyze the stand structure and growth characteristics along different elevations of Pinus koraiensis natural forests located at mean elevation 1,300 m (site1), 900 m (site2) and 600 m (site3) on Mt. Seorak. Mean DBH and height of P. koraiensis were 25.4 cm and 12.3 m in site1, while that of site2 and 3 were over 40 cm and 20 m, respectively. For this reason, there was 5 times difference of single tree volume between site1 and other sites(p<0.05). Mean ringwidth increment of P. koraiensis was 1.1 mm/yr in site1, 1.5 mm/yr in site2 and 2.6 mm/yr in site3. However, recent growth of ringwidth has increased by 8.6% in site1, whereas site2 and 3 have fallen by approximately 50% over the last 10 years. These results signify that the growth and distribution of natural P. koraiensis are effected by different climatic environment along elevations.

간벌 후 붉가시나무 임분의 토양 특성 변화 (Changes in Soil Chemical Properties after Thinning in Quercus acuta stand)

  • 황재홍;이상태;박남창;최재채;신현철;이경재;이광수
    • 한국산림과학회지
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    • 제95권6호
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    • pp.657-662
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    • 2006
  • 본 연구는 전남 완도수목원 내 붉가시나무 임분을 대상으로 간벌이 토양의 화학적 특성 변화에 미치는 영향을 조사하기 위하여 실시하였다. 간벌은 흉고 직경급 10 cm일 때의 상수리나무 잔존 본수를 기준으로 실시하였으며, 토양 시료는 간벌 후 7년이 경과한 이후 채취하였다. 간벌 후 토양 pH는 대조구와의 차이가 나타나지 않았으나, 토양 유기물, 전질소 및 유효인산 농도는 간벌 처리구가 대조구에 비해 높았다. 간벌 후 토양 내 양이온치환 용량(C.E.C)과 치환성 양이온($K^+$, $Na^+$, $Ca^{2+}$, $Mg^{2+}$) 농도 역시 증가하였다. 붉가시나무 임분 내 토양의 양분 농도를 조사한 결과 일반 산림 토양에 비해 낮은 것으로 조사되어, 적절한 간벌 등을 통한 난대림 임분 개선과 갱신을 위한 시업방안 개발이 보다 체계적으로 마련되어야 한다고 판단된다.

임간재배지에서 상대광도에 따른 병풍쌈의 생장 및 엽특성 비교 (Comparison of Growth and Leaf Characteristics of Parasenecio firmus by Different Relative Light Intensity in Forest Farming)

  • 송기선;전권석;윤준혁;김창환;박용배;김종진
    • 한국약용작물학회지
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    • 제22권4호
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    • pp.295-300
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    • 2014
  • This study was carried out to produce more Parasenecio firmus in forest farming. In order to achieve this purpose, it was surveyed the growth and photosynthetic characteristics of P. firmus. Relatively light intensity was controlled by 100%, 60%, 30% and 5% of full sunlight. Height was the highest under 5% of full sunlight. Shoot diameter was the highest in full sunlight. Fresh weight (leaf, stem, root and total) and dry weight (leaf, root and total) were the highest under 30% of full sunlight. S (leaf+stem)/R (root) ratio was the lowest under 30% of full sunlight and the highest under 5% of full sunlight. In leaf characteristics, leaf area, SLA and LAR were getting higher in the lower light level and the highest under 5% of full sunlight ($176.1cm^2$, $420.5cm^2{\cdot}g^{-1}$ and $123.5cm^2{\cdot}g^{-1}$). Especially, leaf area was surveyed higher under 30% of full sunlight in the next. Leaf thickness was getting lower in the lower light level and the lowest under 5% of full sunlight (overall 0.14~0.24 mm). As a result of surveying the whole experiment, P. firmus grows well under 30% and 5% of full sunlight in forest farming.

Hygroscopic Property, Leaching Resistance and Metal Corrosive Efficacy of Wood Treated with Fire Retardants

  • Son, Dong Won;Kang, Mee Ran;Hwang, Won Joung;Lee, Hyun Mi;Park, Sang Bum
    • Journal of the Korean Wood Science and Technology
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    • 제42권2호
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    • pp.157-162
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    • 2014
  • This study was conducted to examine the functionality of the fire retardant treated wood. The hygroscopic property, leaching resistance, metal corrosive efficacy and gas toxicity of retardant treated wood were analyzed. Sodium silicate was penetrated to the wood for making fire retardant treated wood. The subsequent treatment agents such as boric acid, ammonium borate, di-ammonium phosphate were treated after sodium silicate treatment due to fixation. As results for the test, the leaching resist was improved by subsequent treatment. The fire retardant combination such as sodium silicate, boric acid and di-ammonium phosphate showed high hygroscopic property, metal corrosive efficacy. The gas toxicity was also satisfied KS standard.