• 제목/요약/키워드: pine forest

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참나무림내 천연발생한 잣나무 치수의 지상부 현존량 및 양분분포 (Aboveground Biomass and Nutrient Distribution of Korea Pine (Pinus koraiensis) Advance Growth in Deciduous Oak Forests)

  • 지동훈;변재경;정진현;이명종
    • 한국토양비료학회지
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    • 제44권6호
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    • pp.1144-1149
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    • 2011
  • 잣나무는 우리나라의 대표적인 조림수종으로서 종자가 비산하지 못하고 조류나 설치류등의 동물에 의해 운반, 산포됨으로써 잣나무 인공조림지 주변 산림의 하층에 잣나무 치수가 천연 발생하게 된다. 조사 임분 내에서는 직경급, 수고급별 분포에서 역 J자형을 나타내는 음수의 잣나무가 상층의 참나무림에 의해 낮은 광환경과 토양의 비옥도가 낮은 조건하에서 생육하고 있다. 조사 임분은 비교적 온도가 높고 건조한 남서사면이지만 상층의 참나무림 임관에 의해 완화되며, 따라서 잣나무 종자의 발아나 치수를 보호하는 미세 입지환경을 제공 할 수 있을 것으로 생각된다. 잣나무 치수의 전체 현존량은 잣나무 인공림에 비해 높았으며 참나무림 하부의 낮은 광 환경에서도 적응하는 것으로 생각된다. 각 기관별 질소와 인의 농도는 인공 잣나무림 및 혼효하는 참나무림의 각 기관별 농도보다 낮았으며 양분량도 현존량에비해 상대적으로 적었다. 이들 양분은 일반적으로 식물의 성장에 필요한 주요 성분이므로 잣나무와 활엽수 혼효림의 시업에 있어서 지조부는 임상에 존치 시키는 것이 유리할 것으로 판단된다.

Detection of the Damaged Trees by Pine Wilt Disease Using IKONOS Image

  • Lee, S.H.;Cho, H.K.;Kim, J.B.;Jo, M.H.
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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    • pp.709-711
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    • 2003
  • The purpose of this study is to detect the damaged red pine trees by pine wilt disease using high resolution satellite image of IKONOS Geo. IKONOS images are segmented with eCognition image processing software. A segment based maximum likelihood classification was performed to delineate the pine stand. The pine stands are regarded as a potential damage area. In order to develop a methodology to detect the location of damaged trees from the high resolution satellite image, black and white aerial photographs were used as a simulated image. The developed method based on filtering technique. A local maximum filter was adapted to detect the location of individual tree. This report presents a part of the first year results of an ongoing project.

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Thinning Intensity for Large Diameter Trees in Korean White Pine Plantation of South Korea

  • Lee, Daesung;Seo, Yeongwan;Park, Jiyoung;Choi, Jungkee
    • Journal of Forest and Environmental Science
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    • 제33권1호
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    • pp.74-77
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    • 2017
  • The purpose of this study is to analyze the effect of thinning intensity on the growth of large diameter trees in Korean white pine (Pinus koraiensis S. et Z.) plantation. Eight thinning plots were analyzed by categorizing into heavy thinning, light thinning, no thinning (control) according to thinning intensity. As a result, average DBH increased more in heavy thinning plots than in light thinning or unthinned plots. The number of large trees (DBH>25 cm) were obviously shown the most in heavy thinning plots. It is considered that heavy thinning is needed for the production of the large diameter trees.

Carbon Storage of Exotic Slash Pine Plantations in Subtropical China

  • Jin, Ling;Liu, Yuanqiu;Ning, Jinkui;Liu, Liangying;Li, Xiaodong
    • Journal of Forest and Environmental Science
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    • 제35권3호
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    • pp.150-158
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    • 2019
  • Exotic conifer trees have been extensively planted in southern China because of their high apparent growth and yield. These fast-growing plantations are expected to persist as a considerable potential for temporary and long-term carbon sink to offset greenhouse gas emissions. However, information on the carbon storage across different age ranges in exotic pine plantations is often lacking. We first estimated the ecosystem carbon storage across different age ranges of exotic pine plantations in China by quantifying above- and below-ground ecosystem carbon pools. The carbon storage of each tree component of exotic pine (Pinus elliottii) increased significantly with increasing age in Duchang and Yiyang areas. The stem carbon storage except <10 years in Ji'an areas was the largest component among all other components, which accounts for about 50% of the total carbon storage followed by roots (~28%), branches (~18%), and foliage (~9%). The mean total tree carbon storage of slash pine plantations for <10, 10-20 and 20-30 years across three study areas was 3.69, 13.91 and $20.57Mg\;ha^{-1}$, respectively. The carbon stocks in understory and forest floor were age-independent. Total tree and soil were two dominant carbon pools in slash pine plantations at all age sequences. The carbon contribution of aboveground ecosystem increased with increasing age, while that of belowground ecosystem declined. The mean total ecosystem carbon storage of slash pine plantations for <10, 10-20 and 20-30 years across China was 30.26, 98.66 and $98.89Mg\;ha^{-1}$, respectively. Although subtropical climate in China was suitable for slash pine growth, the mean total carbon stocks in slash pine plantations at all age sequences from China were lower than that values reported in American slash pine plantations.

송이 감염묘 육성을 위해 야외 조건에서도 송이균 생존이 가능한 소나무의 최소 크기 결정 (Determination of the Minimum Size of Seedlings with Matsutake Mycelia That Can Survive in the Field for Matsutake-infected Pine Tree Production)

  • 가강현;김희수;전성민;유림;장영선;왕은진;정연석
    • 한국균학회지
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    • 제45권3호
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    • pp.188-195
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    • 2017
  • 송이는 세계적으로 상용 가치가 높은 버섯이나, 아직까지 자연 채취에 의존하고 있다. 현재까지 송이 감염묘를 통해 송이를 한 개씩 발생시키는 것까지는 한국과 일본에서 성공하였다. 본 연구에서는 송이 감염묘법에서 송이균이 생존할 수 있는 소나무의 최소 크기를 결정하고자 하였다. 송이 감염묘에서 송이균이 생존한 것은 이식 2년째에 14본(50%)과 이식 1년째에 10본(71%)이었다. 이식 후 송이균이 생존한 송이 감염묘는 이식 당시 평균 수고가 25 cm (최소 12 cm ~ 최대 40 cm) 였다. 결론적으로 송이 감염묘의 수고가 최소 12 cm 이상이 되면, 야외 조건에서 송이균이 생존할 수 있을 것으로 판단되었다. 이 결과는 기존의 송이 감염묘에서 사용하는 기주식물의 크기를 획기적으로 줄여 송이 감염묘 방법을 개선하였고, 송이 인공재배를 위해 어느 정도 크기의 소나무를 활용하는 것이 좋을 지의 기준을 제시하였다.

도장처리에 따른 소나무 판재의 휘발성유기화합물 방출특성 변화 (Changes of VOCs Emission on Pine (Pinus Rigida) Board by Finishing with Different Coating Types)

  • 박상범;이민;이상민;강영석
    • 한국가구학회지
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    • 제26권2호
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    • pp.122-129
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    • 2015
  • In previous study, VOC emission characteristics of coating materials for wood finishing were conducted and results showed that eco-friendly products has about 15~46% lower TVOC emission than typical products. In this study, lower TVOC emitted coating materials were applied on pine and then changes of VOC emission characteristics from pine with treatments were determined. Non-treated pine emitted $604.7{\mu}g/m^2h$ of TVOC that contained 66% of NVOC ($399.7{\mu}g/m^2h$). However, $V_2$ finished pine showed no NVOC emission rather than AVOC emission that consisted of Toluene, Ethylbenzene, m,p-Xylene, o-Xylene, 1,2,4- Trimethylbenzene. All coating materials inhibited ${\alpha}$-Pinene emission which originally from pine, but waterborne stain ($W_1$ and $W_3$) showed lower disruption of that emission. Moreover, $W_3$/wood showed higher NVOC emission such as ${\alpha}$-Terpinol, Terpinen-4-ol which are known as antioxidant substrates. Based on results, VOC emission characteristic of pine was significantly affected by coating materials with negatively in terms of ${\alpha}$-Pinene emission or positively in terms of NVOC emission. Therefore, coating material is important factor for indoor air quality when it would apply on wood products. For the future study, VOC emission characteristic of coated wood will be conducted continuously.

소나무재선충병 매개충 솔수염하늘소(Monochamus alternatus) 방제를 위한 휴대용 수피제거기 개발 및 산란 방지 효과 (Invention of the Portable Bark Remover for Control of Pine Wilt Disease by Disruption of Oviposition of Insect Vector (Monochamus alternatus))

  • 김준범;박영규
    • 한국산림과학회지
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    • 제102권2호
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    • pp.300-304
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    • 2013
  • 소나무재선충(Bursaphelenchus xylophilus)에 의해서 발생되는 소나무재선충병(Pine wilt disease)은 우리나라 소나무림에 피해를 주고 있다. 소나무재선충은 매개충인 솔수염하늘소(Monochamus alternatus Hope) 성충이 건전한 소나무의 신초를 갉아먹는 후식과 산란을 통해서 옮겨진다. 현재까지의 소나무재선충병 방제에는 metam-sodium SL(25%)약제를 사용하여 고사한 소나무를 훈증하는 것이 주된 방법이었으나 농약에 의한 환경오염이나 훈증을 위해 피복하는 비닐로 인해 산림경관을 해치는 문제가 발생하였다. 따라서 휴대용 수피제거기(Portable Bark Remover)는 산림 사업용 엔진톱 끝부분에 장착되어, 소나무재선충병 감염 고사목 방제 현장에서 간단하고 빠르게 수피를 제거 함으로써 매개충의 산란과 부화 등의 서식처 제공이 차단되어 결국 온전한 생활사를 완성 할 수 없어 죽게 되도록 친환경적으로 개발되었다. 또한 소나무재선충병 매개충 방제를 위한 휴대용 수피제거기의 활용은 파쇄, 소각, 훈증 등의 기존의 방제 방법에 비하여 비용의 절감과 높은 방제 효과를 기대 할 수 있다.

국내 소나무재선충병 발생 특성 분석: 2016~2018년 예찰데이터를 기반으로 (Analysis of Occurrence Characteristics of Pine Wilt Disease in Korea based on Monitoring Data from 2016 to 2018)

  • 심상택;이성희;이차영;남영우
    • 한국산림과학회지
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    • 제110권2호
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    • pp.280-288
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    • 2021
  • 소나무재선충병의 발생 특성을 이해하는 것은 소나무재선충병의 피해 및 확산을 최소화하기 위한 방제전략 수립을 위해 필수적이다. 따라서 본 연구에서는 기상 요인, 지리적 요인, 그리고 인위적 요인과 같은 환경 조건과 소나무재선충병 발생과의 관계를 분석하였다. 2016년 5월부터 2018년 4월까지 소나무재선충병 발생 자료와 자연적, 인위적 요인들을 포함한 다양한 환경 조건의 공간 자료들을 수집하였고, 소나무재선충병에 의한 고사목 발생 본 수에 대한 환경 변수들의 상대적 기여도를 평가하였다. 총 17개의 자연적 요인과 인위적 요인 중에서 소나무재선충병 발생에 영향을 미치는 요인들을 확인한 결과 자연적 요인은 고도와 5~8월 기온이, 인위적 요인은 도로와 건물과의 거리가 소나무재선충병 감염고사목 발생본수와 밀접하게 연관이 있는 것으로 나타났다.

Early Disease Development and Stem and Leaf Water Content in the Seedlings of Pinus koraiensis Inoculated with Pinewood Nematodes in a Greenhouse

  • Woo, Kwan-Soo;Yoon, Jun-Hyuek
    • The Plant Pathology Journal
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    • 제25권3호
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    • pp.241-246
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    • 2009
  • Korean pine (Pinus koraiensis Sieb. et Zucc.), a five-needle pine, has recently been suffering pine wilt disease caused by non-native pinewood nematode, Bursaphelenchus xylophilus. Three-year-old Korean pine seedlings were inoculated with 10,000 pathogenic nematodes in a greenhouse to investigate disease development, water content and the density of nematodes in stems. Needle dehydration, xylem drying and pith browning started 20 days after inoculation (DAI). There were significant differences between seedlings inoculated with nematodes and control seedlings in the relative water content of stems and leaves at 20 and 30 DAI. At 60 DAI, all remaining seedlings inoculated with nematodes had died, but control seedlings all remained alive. The average number of nematodes recovered from stems of Korean pine dramatically increased from 10 to 20 DAI, and then decreased at the end of the experiment at 60 days. This study suggests that the relative water content of stems and leaves in current-year branches could be used as a useful physiological indicator for early diagnosis of pine wilt disease.

Pre-Infection Behavior of the Pitch Canker Fungus Fusarium circinatum on Pine Stems

  • Thoungchaleun, Vilakon;Kim, Ki-Woo;Lee, Don-Koo;Kim, Chang-Soo;Park, Eun-Woo
    • The Plant Pathology Journal
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    • 제24권2호
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    • pp.112-117
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    • 2008
  • Pre-infection behavior of Fusarium circinatum on stems of pine species was investigated with scanning electron microscopy. Two-year-old stems of Pinus densiflora and p. rigida were inoculated with the fungal conidial suspension and subjected to $25^{\circ}C$ for up to 16 hr. Most microconidia germinated 12 hr after inoculation on pine stems. Conidia produced germ tubes from either one or both ends of microconidia. Germ tubes grew over the stem surface and appeared to enter host tissues through natural openings on pine stems. Surface cracks in the cork were entrance sites of germ tubes of F. circinatum. In addition, host cell wall cracks were often found at the tip of germ tubes. The cuticle appeared to be eroded either at the tip of germ tubes or around germlings. Germ tubes also produced appressoria-like structures, exhibiting swollen tips of germ tubes on the stem surface. There seems to be no significant differences in the pre-infection behavior of F. circinatum on stems between the two pine species.