• 한국산림과학회지
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• 제99권5호
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• pp.726-735
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• 2010

Publications with the data on allometric equation, biomass and productivity of major oak forests in Korea were reviewed. Different allometric equations of major oak species showed site- or speciesspecific dependences. The biomass of major oak forests varied with age, dominant species, and location. Aboveground tree biomass over the different oak species was expressed as a power equation of the stand age. The proportion of tree component (stem, branch and leaf) to total aboveground biomass differed among oak species, however, biomass ranked stem > branch > leaf in general. The leaf biomass allocation over the different oak species was expressed as a power equation of total aboveground biomass while there were no significant patterns of biomass allocation from stem and branch to the aboveground biomass. Tree root biomass continuously increased with the aboveground biomass for the major oak forests. The relationship between the root to shoot ratio and the aboveground tree biomass was expressed by a logarithmic equation for major oak forests in Korea. Thirteen sets of data were used for estimating the net primary production (NPP) and net ecosystem production (NEP) of oak forests. The mean NPP and NEP across different oak forests was 10.2 and 1.9 Mg C $ha^{-1}year^{-1}$. The results in biomass allocation, NPP and NEP generally make Korean oak forests an important carbon sinks.

• 한국자원식물학회지
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• 제23권3호
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• pp.242-247
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• 2010

This study was carried out to elucidate the effect of mulching materials on the growth of Chinese chive (Allium tuberusum Rottler) and weed control. Chinese chive was grown under five mulching materials, pine leaf, oak leaf, rice straw, rice hull and sawdust, at the Experimental Farm of Chungbuk National University from June 20, 2009 to September 30, 2009. Amaranthus mangostunus, Digitaria sanguinalis, Portuclaca. oleracea, Echinochioa crus-galli var. frumetacea and Setaria viridis were dominant weeds. Both pine and oak leaves were significantly effective mulching materials in terms of weed control indices in both nursery and field. Soil moisture contents were 1.2~3.7% higher in mulching, especially in oak leaf mulching. Mulching with pine leaf significantly increased plant height, sheath length, leaf length, bulb-, root- and leaf-weights and yield of Chinese chive, but there were no significant differences among the other mulching materials although better than those in non-mulching.

• The Korean Journal of Ecology
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• 제19권6호
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• pp.529-541
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• 1996

During the period of December 1992 (winter-spring) and from February 1995 (winter-spring), the leaf processing rates of oak (Quercus serrata) and tulip (Liriodendron tulipifera) tree was investigated in the headwater streams in southeastern part of Korea in conjunction with the distribution pattern of macroinvertebrate fauna. Using two types of bags ($10\times30cm$ with 5 g of dry leaves; open bag with holes, closed bag without holes), decomposition rates of oak and tulip tree by shredder and/or microbiota at a reatively undisturbed 2nd-order stream were compared, Regardless of leaf type, leaves in the open bage decomposed slightly faster than those in the closed bags. In the 1992 experiment, osk leaves decomposed much slower than tulip leaves (after 138 degree days, osk : closed, 0.006% loss/day ; open, 0.008 ; tulip: closed, 0.021 ; open, 0.023; n=2). The of the first experiment using oak leaves in 1995 were similar to those of the first experiment (after 151 degree days, oak: closed, 0.005% loss / day; open, 0.006; n=6). Over 50% of invertebrates from 122 leaf pack samples collected from 12 streams during the winter period of 1994 were identified as shredders (shredder, 56.2; collector, 32.7; scraper, 8.65; predator, 2.45%). Among shredders, Gammarus sp. and Tipula sp. were dominant species in terms of number and biomass (8.2 ind./g, 1.0 ind./g AFDW of leaves). Among many physico-chemical parameters, the width of stream channel was found to be the most influential factor in the distribution of Gammarus and Tipula (Gammarus: r=-0.34, P<0.001;Tipula:r=0.40, P<0.001). Considering the fact that oak is one the dominant riparian vegetation in the southeastern part of korea, the patterns of oak processing and shredder distribution shown in theis study may well represent some of the important characteristics of headwater steams in southeastern Korea.

• 한국유기농업학회지
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• 제18권4호
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• pp.587-598
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• 2010

몇 가지 멀칭 재료가 감자의 생육과 잡초 방제에 미치는 영향을 구명코자 충북대학교 부속농장에서 2008년 8월 9일부터 2009년 6월 28일까지 수행하였다. 시험 품종은 '수미'였으며, 솔잎, 참나무잎, 짚, 왕겨, 톱밥 멀칭과 대조구(무멀칭) 등 6처리를 하였다. 재배시기에 따라 가을재배와 봄재배로 구분하였다. 본 연구 결과를 요약하면 다음과 같다. 가을감자의 초장, 경장, 엽장, 엽중, 괴경중은 솔잎 멀칭구에서 다른 처리와 유의성을 나타냈다. 가을감자 재배시 우점 잡초는 돌피, 명아주이었으며, 봄감자 재배시 우점 잡초는 돌피, 방동사니이었다. 멀칭에 따른 잡초 발생 억제 효과는 모든 멀칭구가 대조구와 유의성을 나타냈다. 수분함량은 왕겨 멀칭구에서 가장 높아 대조구와 차이를 나타냈다. 멀칭 처리구의 지온은 대조구에 비해 가을감자 재배시 $1.0{\sim}2.8^{\circ}C$ 낮았고, 봄감자 재배시 $0.7{\sim}2.3^{\circ}C$ 낮았다. 멀칭재료에 따른 지온은 솔잎 멀칭구, 짚 멀칭구, 낙엽 멀칭구, 왕겨 멀칭구, 톱밥 멀칭구, 대조구 순으로 낮았다.

• 분석과학
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• 제11권6호
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• pp.478-484
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• 1998

상수리나무(Quercus acutissima, 3년생)의 잎, 줄기, 뿌리, 껍질, 및 열매에 각각 존재하고 있는 polyphenol 성분의 분포를 thin layer chromatography와 column chromatography를 이용하여 조사하였다. 총 25종류의 polyphenol 성분을 분리하였는데, 이들 중 잎에서 15개, 줄기에서 11개, 뿌리와 껍질에서 각각 7개를 분리하였으며, 열매에서는 4개의 성분을 분리하였다. 분리한 polyphenol 성분들 중에는 catechin 성분이 모든 부위에서 비교적 많이 분포하고 있었으며 일부 flavonoid 성분들도 확인되었다. 잎을 제외한 모든 부위에서 3종류의 polyphenol isomer의 존재를 확인했으며, 잎에서는 monomer와 oligomer성 polyphenol의 존재를 확인했으나 polymeric polyphenol이 확인되지 않았다. Quercus acutissima에서 polyphenol의 총함량은 껍질에서 상대적으로 가장 많았고, 다음으로는 뿌리, 잎, 열매의 순으로 많이 분포하였으며, 줄기에서 가장 적은 양이 확인되었다.

• 한국환경복원기술학회지
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• 제13권3호
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• pp.36-45
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• 2010

To analyze the relationship between climatic factors (monthly mean temperature and total precipitation) and tree-ring growths of Quercus mongolica Fischer (Mongolian oak) with different topographic sites in Mt. Worak, more than 10 trees were selected from each of seven stands. Two cores from each tree were measured for ring width. After crossdating, each ring-width series was double standardized by fitting first a negative exponential or straight regression line and secondly a 60-year cubic spline. Seven stands were categorized in two groups using cluster analysis for tree-ring index patterns. Cluster I (four stands) was located in higher elevation (550-812 m) with aspects of east, west and northwest, and cluster II (three stands) was located in rather lower election (330-628 m) with aspects of north and northwest. The aspects of two clusters were not significantly different. Response-function analysis showed a significant positive response to March precipitation for both clusters. It indicates that moisture supply during early spring season is important to radial growth because the cambial growths of ring-porous species, such as Mongolian oak, start before leaf growth. Cluster II showed a positive response to the precipitation of middle and late growing season, too.

• 공업화학
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• 제21권5호
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• pp.575-580
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• 2010

우리나라는 전국토의 70%가 산림지역으로 1990년대 중반 이후 산불발생 건수가 지속적으로 증가하고 있고, 그 규모 또한 대형화되는 추세이다. 산림 내에 퇴적된 낙엽, 초본류, 침엽수 및 활엽수 등이 산불발생 시 매개체가 되며, 이들 수종별 연소 및 열분해 특성에 대한 연구는 미미한 실정이다. 본 발표에서는 국내 산림의 대표적 활엽수인 굴참나무 잎을 대상으로 TGA를 이용해 열분해반응 및 연소 특성에 대한 연구를 수행하였다. 굴참나무 잎은 $239^{\circ}C$ 부근에서 발화가 시작되며 열분해는 $250^{\circ}C$에서부터 시작되었다. TGA 분석으로부터 얻은 실험데이터는 미분법을 적용하여 전화율 변화에 따라 활성화에너지와 전지수인자를 계산하였다. 열분해반응에서 활성화에너지는 전화율 증가에 따라 증가하였으나, 연소과정에서의 활성화에너지는 감소하는 경향을 나타냈다.

• 한국연초학회지
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• 제22권1호
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• pp.51-57
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• 2000

The feeding preference of cigarette beetles, Lasioderma serricorne F., was tested using various leaf litters. The number of the trapped L. serricome was 45.25$\pm$10.44 at flue-cured leaf tobacco, Nicotiana tabacum L., 23.50$\pm$6.0 at chinese juniper, Juniperus chinensis L., 1l.75$\pm$4.99 at oak, Qqercus acutissiuma C., and 1l.50$\pm$2.52 at rice-straw, (Oryza. sativa L.). The response of oviposition was 93.20$\pm$26.22 at flue-cured leaf tobacco, 53.60$\pm$11.82 at chinese juniper, 48.20$\pm$20.90 at oriental arborvitae, Thuja orientalis L., 31.80$\pm$18.10 at cherry-tree, Prunus serrulata var. spontanea M., and 29.40$\pm$13.7 at rice-straw. However, the oviposition was respectively low at gingko, Ginkgo biloba L.,(5.40$\pm$2.97), turf grass, Zoysia japonica S., (5.20$\pm$13.7), and oak (3.00$\pm$l.41). The augmentation was maximum at chinese juniper (27.33$\pm$19.44 of emerged adults) followed by Magnolia obovata (8.50$\pm$9.33). Fifty percent of the tested species leaf litters including cherry-tree did not show any augmentation. The adult activities after hibernation were primarily found in May and June at Kwangju and Suwon, and in April at Chungju. The field activity of L. serricome at Suwon was mostly lower than that at other places, except in August at Chungju. The first appearance of L. serricome was observed earlier at Chungju and Kwangju than at Suwon, and the frequency of insect appearance was high in July, August, and September. L. serricome could hibernate by feeding on many kinds of plant leaf litters and it's population could be maintained in the open field in Korea.

• The Korean Journal of Ecology
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• 제10권4호
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• pp.183-193
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• 1987

An investigation was performed to draw the decy map of litters on the floors of pine and oak forests in Korea and to reveal the turnover cycles of N, P, K, Ca and Mg in litters. Isodecay constant lines of litter organic matter, which are depended upon the altitude, latitude and orientation, were drawn on the Korean map. The decay constants of organic matter of litters were higher in the broadleaf tree forests than in the needleleaf tree forests, and in the grasslands than in the forests. The amount of mineral nutrients such as N, P, K, Ca and Mg returned annually to soils is higher in the broadleaf tree forests than in the needle leaf tree forests, and highest in the Quercus mongolica forest of the forests.

• 한국세라믹학회지
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• 제41권2호
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• pp.158-164
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• 2004

우리 주변에서 쉽게 구할 수 있는 12가지 나무와 참나무잎, 소나무껍질 등을 나무 부위별로 구분하여 나무재를 만들어 한국적 천연 재유의 특성을 연구ㆍ분석한 결과 나무재의 주성분은 CaO이며 소나무껍질재는 $SiO_2$, 참나무잎재의 주성분은 CaO와 $SiO_2$이다. 아카시아나무재, 미루나무재 및 대추나무재는 다른 나무재에 비해 MgO와 Fe$_2$ $O_3$ 성분이 많이 함유되어 있어 노랑색기를 띤 녹색유약으로 나타났으며 UV에 의한 4분류 중 가장 채도가 높아 맑은 색을 지닌 투명유 제조에 적합하다. 포도나무재, 배나무재 및 참나무재는 재 안에 많이 함유된 Fe$_2$ $O_3$, MgO 및 MnO의 영향을 받아 UV 분석결과 노랑색기를 띤 녹색 현상이 나타났으며 다른 나무재보다 P$_2$ $O_{5}$의 함량이 많아 온화하고 안정된 느낌을 주는 유백현상이 강하게 나타나 유백유 제작에 적합하다. 소나무재, 플라타너스나무재 및 느티나무재는 다른 나무재에 비해 CaO 성분과 P$_2$ $O_{5}$ 성분이 많아 12가지 나무재 중 가장 선명하고 푸른색기가 많은 녹색 현상이 나타나 청자유약제조에 적합하다. 자작나무, 참나무, 밤나무는 소량으로 유약의 색상에 많은 영향을 주는 MnO가 가장 많이 함유되어 있고 아카시아나무재, 미루나무재, 대추나무재 보다는 약하지만 노랑색기를 띤 녹색유 현상이 나타나 이라보 유약 제조에 적합하다.