• 한국산림과학회지
• /
• 제84권4호
• /
• pp.502-516
• /
• 1995

30년생 테다소나무(Pinus taeda)림과 30년생 소나무(Pinus densiflora)림 시험구에서 수관통과우량(樹冠通過雨量), 수간유하우량(樹幹流下雨量), 차단손실우량(遮斷損失雨量) 및 임내강우량(林內降雨量)을 산정(算定)하고 이것에 관여하는 인자(因子)와의 관계(關係)를 밝힌 결과 다음과 같은 결과를 얻었다. 1. 시험기간(試驗期間)의 총강우량(總降雨量)은 3,107.6mm로, 연평균(年平均) 1,035.9mm였으며 시험기간(試驗期間)동안 조사된 일단위우량(日單位雨量)의 강우강도빈도(降雨强度頻度)는 30mm 이하가 전체의 90%(1992년), 81%(1993년), 88%(1994년)였다. 2. 선정(選定)된 총(總) 85회(回)의 단위강우(單位降雨)에 대한 수관통과우량(樹冠通過雨量), 수간유하우량(樹幹流下雨量), 차단손실우량(遮斷損失雨量)은 임외강우량(林外降雨量)과 직선관계(直線關係)를 보였다. 수관통과우량(樹冠通過雨量)은 테다소나무림에서 2,432.5mm(78.3%), 소나무림은 2,699.6mm(86.9%)였으며, 회귀식(回歸式)에 대한 단위 강우당 차단저류능(遮斷貯留能)은 각각 1.1mm와 1.3mm로 추정(推定)되었다. 3. 수관유하우량(樹幹流下雨量)은 테다소나무림에서 227.3mm(7.3%), 소나무림에서 62.7mm(2.0%)로 나타났으며, 회귀식(回歸式)을 이용하여 추정(推定)된 단위 강우당 수간유하우량(樹幹流下雨量)의 발생강우량(發生降雨量)은 각각 약 7.2mm와 1.9mm로 추정(推定)되었다. 4. 차단손실우량(遮斷損失雨量)은 임외강우량(林外降雨量)에서 수관통과우량(樹冠通過雨量)과 수간유하우량(樹幹流下雨量)을 제(除)하여 산정(算定)하였으며, 테다소나무림에서 447.8mm(14.4%), 소나무림에서 345.3mm(11.1%)로 산정(算定)되었다. 5. 수관통과우량(樹冠通過雨量)과 수간유하우량(樹幹流下雨量)의 합(合)으로 나타나는 임내강우량(林內降雨量)은 태다소나무림에서 2,659.8mm(85.6%)였고, 소나무림에서 2,762.3mm(88.9%)였다. 6. 수관통과(樹冠通過) 및 수간유하율(樹幹流下率)은 강우량(降雨量)이 증가(增加)할수록 급증(急增)하다가 각각 30mm, 50mm 이상의 강우(降雨)에서 일정(一定)하게 유지되었고, 차단손실율(遮斷損失率)은 강우량(降雨量)이 증가(增加)함에 따라 급감(急減)하다가 50mm 이상의 강우(降雨)에서 일정(一定)하게 유지되었다.

• Journal of the Korean Wood Science and Technology
• /
• 제40권1호
• /
• pp.53-59
• /
• 2012

This study used pine wilt disease damaged trees as raw materials. The damaged woods were subjected to soaking treatment using wood vinegar, nematicide and sea water, fumigated treatment using fumigation, and the bending strength and hardness of the timber were measured at different points of time after the treatment. In soaking treatment, the highest bending strength was obtained from wood vinegar (100 fold dilution)-soaked specimens of Pinus densiflora and the nematicide-soaked specimens of Pinus thunbergii. The highest hardness in cross section was gained from the nematicide-soaked specimens of Pinus densiflora and Pinus thunbergii, the highest hardness in radial section was obtained from the nematicide-soaked specimens of Pinus densiflora and wood vinegar (100 fold dilution)-soaked specimens of Pinus thunbergii, and the highest hardness in tangential section was obtained from the nematicide-soaked specimens of Pinus densiflora and Pinus thunbergii, and there were not significantly different among the treatments. When fumigated treatment was applied, bending strength, hardness was somewhat lower in the control but were not significantly different between the treatments.

• 한국육종학회지
• /
• 제41권4호
• /
• pp.377-384
• /
• 2009

Three-year-old seedlings of susceptible Pinus densiflora and resistant Pinus x rigitaeda were each inoculated with the pinewood nematode, Bursaphelenchus xylophilus, to compare disease development. Needle dehydration was evident on seedlings of P. densiflora by 20 days after inoculation, 10 days earlier than this symptom was observed on P. ${\times}$ rigitaeda. Xylem drying was more frequent in seedlings of P. densiflora than in that of P. ${\times}$ rigitaeda between 20 and 60 days after inoculation. No significant differences were found between P. densiflora and P. ${\times}$ rigitaeda for stem water content or for stem and leaf relative water content in current-year branches after nematode inoculation, but the average number of B. xylophilus recovered from stems differed significantly between the two groups. The number of B. xylophilus recovered from stems was negatively correlated with the stem water content and with stem and leaf relative water content. By the time the experiment was terminated at 60 days after inoculation, all 3 of the last group of P. densiflora seedlings had died, but 2 of the 3 remaining P. ${\times}$ rigitaeda hybrid seedlings were still alive. Additional studies are needed to further explore the specific mechanisms preventing nematode multiplication in the seedlings of resistant P. ${\times}$ rigitaeda.

• 한국환경복원기술학회지
• /
• 제7권5호
• /
• pp.38-46
• /
• 2004

This study was carried out to analyze forest vegetation in Seodaesan of Geumsan, Chungnam Province. Employing the releve method of Braun-Blanquet and quadrat method, 36 plots were sampled in forest of Seodaesan. The sub-communities were classified into Pinus densiflora, Acer pseudosieboldianum, and Carpinus laxiflora sub-community of Quercus mongolica community. The importance values were 77.07 in Quercus mongolica, 40.79 in Pinus densiflora, 17.03 Fraxinus rhynchophylla, 14.06 in Fraxinus sieboldiana, 13.99 in Quercus serrata, 12.93 Acer pseudosiebotdianum. Coverage rate was 84.6% in tree layer, 52.8% in subtree layer, 29.1% in shrub layer, 27.9% in herb layer, respectively. Most of the DBH of Quercus mongolica and Pinus densiflora was between 5cm and 20cm. Therefore, Quercus mongolica and Pinus densiflora might be dominant species in the study area for several decades. Acer pseudosieboldianum and Carpinus laxiflora sub-communities were distributed mainly in a high-altitude and northern and north-western area. Pinus densiflora sub-community was distributed mainly in a low-altitude and western area.

• 한국식품과학회지
• /
• 제29권2호
• /
• pp.204-210
• /
• 1997

소나무(Pinus densiflora Siebold et Zuccarini) 잎의 ethyl acetate 추출물은 세균, 효모, 곰팡이에 대하여 항미생물활성을 나타내었다. 활성물질을 solvent fractionation, silica gel adsorption column chromatography, Sephadex LH-20 column chromatography 등에 의해 정제하여 백색결정상 물질로 단리하였다. $MS,\;^{1}H-NMR,\;^{13}C-NMR$ 등의 기기분석에 의해 단리된 물질의 구조해석을 시도한 결과 benzoic acid로 동정되었다. Benzoic acid가 솔잎에서 분리, 동정된 것은 처음으로 생각되며 특히, 솔잎 생체중량 g당 0.608 mg이나 함유되어 있어, 타 식물체에 비하여 대단히 많은 양이 함유되어 있음이 확인되었다.

• 농촌계획
• /
• 제17권3호
• /
• pp.15-25
• /
• 2011

This paper is to contribute for management and restoration as a basic study of vegetation structure in Aemirang Hill, Nakdongjeongmaek. To verify the characteristics of vegetation structure, we set up 25 plots($100m^2$). The result of community analysis was used by TWINSPAN classification. The communities were classified 7 types i.e. Quercus variabilis community, Quercus mongolica community, Pinus densiflora community, Pinus densiflora-Quercus mongolica community, Q. mongolica-Quercus variabilis community, Quercus mongolica-Betula davurica community, Larix leptolepis community. Pinus densiflora community and Pinus densiflora-Quercus mongolica community are progressively transforming a Quercus mongolica community that is called Pinus densiflora next succession stage. Whereas the communities that has dominant Quercus variabilis and Quercus mongolica did not appear a next generation succession tree such as Carpinus laxiflora, Carpinus cordata in the under story and shrub layer. Therefore, Aemirang Hill's ecological succession was to maintain the status condition. Aemirang Hill's diversity index is 0.5738 to 0.8906. It were analyzed that diversity index was lower than other places.

• Current Research on Agriculture and Life Sciences
• /
• 제19권
• /
• pp.31-37
• /
• 2001

Uyeki(1928) classified Pinus densiflora into six ecotypes(Northeastem type, Middle-southern flat type, middle-southern upland type, Wibong type, Ankang type, and Geumgang type) based on the pine tree type. The bark color of Geumgang type was ash-brown color on the lower parts of stem and yellowed color on the upper parts of stem. We investigated the physicochemical properties of soil forests to obtain basic data for preservation of exellent pine (Pinus densiflora for. erecta Uyeki). The results were as follows; The soil texture of the Pinus densiflora for. erecta Uyeki forests were showed nearly as sandy loam, that is, sand, silt and clay were consisted of 72%, 15% and 13%, respectively. Soil acidity(pH 4.6) was lower than Korea average forest soil acidity(pH 5.2). The average contents of available phosphate was 11.7ppm at Sokwang-ri, 26.8ppm at Mt. Eungbong, 24.2ppm at Mt. Kumma. It was the lowest at Uljin(4.6ppm). The contents of carbon was 6.2% at Mt. Chungok, 6.1% at Mt. Eungbong. This value was more than average of Korea forest soil.

• 한국환경복원기술학회지
• /
• 제12권6호
• /
• pp.143-152
• /
• 2009

This study has been carried out to estimate carbon contents in an average 37-years-old Pinus densiflora plantations and an average 42-years-old natural Quercus acutissima stands in Gongju, Chungnam Province. Average carbon concentration in stemwood, stembark, branch, foliage, and root were 54.59% in Pinus densiflora and 53.73% in Quercus acutissima stands. Aboveground carbon contents was estimated by the equation model logWt = A + BlogD where Wt is oven-dry weight in kg and D is DBH in cm. Total carbon contents was 79.28t/ha in Pinus densiflora stands and 71.52t/ha in Quercus acutissima stands. Net primary carbon production was estimated at 9.79tC/ha/yr in Pinus densiflora stands and 5.52tC/ha/yr in Quercus acutissima stands.

• 한국식품과학회지
• /
• 제29권4호
• /
• pp.823-826
• /
• 1997

소나무(Pinus densiflora Siebold et Zuccarini) 잎의 EtOAc 추출물이 세균, 효모, 곰팡이에 대하여 항미생물활성을 나타냈다. 활성물질은 solvent fractionation, silica gel adsorption column chromatography, Sephadex LH-20 column chromatography 등에 의해 정제되고 HPLC에 의해 분리되었다. 분리된 물질은 MS, $^{1}H-NMR,\;^{13}C-NMR$ 등의 기기분석에 의해 trans-cinnamic acid로 동정되었으며 이 물질은 솔잎 생체중량 g당 $9.27\;{\mu}g$정도 함유되어 있었다.

• Journal of the Korean Wood Science and Technology
• /
• 제36권4호
• /
• pp.77-83
• /
• 2008

국내에서 생장한 주요 침엽수 3종(소나무, 잣나무, 리기다소나무)의 수간 내 마이크로피브릴 경사각(microfibril angle, MFA)의 축방향 및 방사방향 변이를 요오드 침적법에 의해 조사하였다. 각 수종의 MFA의 평균값은 소나무 $16.4^{\circ}$, 잣나무 $14.4^{\circ}$, 리기다소나무 $26.2^{\circ}$로 리기다소나무가 가장 크게 나타났다. 공시 수종의 MFA는 약 15~20 연륜까지 감소하다가 그 후 거의 안정된 경향을 보여 주었고 만재부의 MFA는 조재부의 MFA보다 다소 작은 경향이 있었다. 공시재료의 수고에 따른 MFA의 차이는 기부 부분에서 다소 크게 나타났으며 수고가 증가함에 따라 MFA는 감소하는 경향이 있었으나 리기다소나무 조재부는 예외였다. 따라서 MFA는 국내산 주요 침엽수재의 미성숙재와 성숙재를 구분하는 지표의 하나로 이용이 가능할 것으로 생각되었다.