• The Korean Journal of Mycology
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• v.25 no.2 s.81
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• pp.130-132
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• 1997

Artificial cultivation of Phellinus linteus was studied. The best yield (B.E. $9.4{\pm}1.6$) of basidiocarps including basidiospore was obtained using Quercus acutissima among the logs of Morus alba, Quercus acutissima, Alnus japonica, Castanea crenata. Optimum temperature and required periods for the basidiocarps formation were $25^{\circ}C$ and about 10 months, respectively.

• Journal of the Korean Applied Science and Technology
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• v.10 no.1
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• pp.93-101
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• 1993

This study aimed to search for separate and identify of Quercus acutissima CARRUTHERS tannins. Tannins were extracted with methanol and ethylacetate from acorn powder and identified TLC, UV spectrum, HPLC, IR, GC/MS, and $^{1}H$ NMR. Three spots($R_{f}$ 0.94, 0.84 and 0.29) detected on TLC. These spots gave dark blue color fairly on spraying with 0.3% potassium ferricyanid${\cdot}$0.3% ferricchloride reagent, and these tannins identified as gallic acid, caffeic acid and ellagic acid by UV spectrum, HPLC, IR, GC/ MS, and $^{1}H$ NMR.

• Journal of Korea Foresty Energy
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• v.22 no.1
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• pp.44-48
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• 2003

Flexural properties were investigated on clear specimens made from small diameter thinned trees of pitch pine (Pinus rigida Mill.), Japanese red pine (Pinus densiflora Sieb. et Zucc), Japanese larch (Larix kaempferi Carr.), and sawtooth oak (Quercus acutissima Carr.). MOR and MOE values of small clear specimen were depended on the species. The highest density of sawtooth oak shows the highest values of MOR and MOE. However, the lowest density of Japanese larch shows the lowest values of MOR. It was also shown that flexural properties could be predicted by stress wave MOE, since the correlations between stress wave MOE and flexural properties were relatively good.

• Journal of Plant Biology
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• v.24 no.4
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• pp.217-231
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• 1981

This research was conducted to determine if the obtained serological data would reveal: (1) grouping among basic Quercus species, (2) the degree of correspondence within and among any detected grouping, and (3) the comparative value of new serological technique, "rocket immunoelectrophoresis". Overall quantitative and qualitative data indicate the genus Quercus is distantly separated from the Fagus. Within the Quercus, the subgenus Cyclobalanopsis is separable from the Lepidobalanus. But the elevation of the Cyclobalanopsis to the rank of a separate genus is not warranted. Antisera produced to the species belonging to Lepidobalanus gave strong reactions with other experimental species in the same subgenus. Particularly, Q. aliena, Q. donarium, and Q. serrata are tied up each other in terms of serological similarity. Rocket immunoelectrophoresis used in this systematic research proved to be a valuable new technique for systematic serology. To obtain the degree of protein similarity (serological correspondence) this technique was used in plant systematic research and determined by sum of total rocket heights. The rocket immunoelectrophoresis illustrated the measurement of individual immunoprecipitin systems identical or partly identical to those in the reference-reaction as quantitation of all available rocket heights.t heights.

• Korean Journal of Soil Science and Fertilizer
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• v.40 no.5
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• pp.429-434
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• 2007

This study was conducted to estimate site productivity of Quercus acutissima and Quercus mongolica by four forest climatic zones. We used site environmental variables (28 geographical and pedological factors) and site index as a site productivity indicator from nation-wide 23,315 stands. Based on multiple regression analysis between site index and major environmental variables, the best-fit multivaliate models were made by each species and forest climatic zone. Most of site index prediction models by species were regressed with seven to eight factors, including altitude, relief, soil depth, and soil moisture etc. For those models, three evaluation statistics such as mean difference, standard deviation of difference, and standard error of difference were applied to the test data set for the validation of the results. According to the evaluation statistics, it was found that the models by climatic zones and species fitted well to the test data set with relatively low bias and variation. Also having above middle of site index range, total area of productive sites for the two Quercus spp. estimated by those models would be about 6% of total forest area. Northern temperate forest zone and central temperate forest zone had more productive area than southern temperate forest zone and warm temperate forest zone. As a result, it was concluded that the regressive prediction with site environmental variables by climatic zones and species had enough estimation capability of forest site productivity.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.10 no.5
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• pp.51-57
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• 2007

In order to study the characteristics of vegetation structure in Gundal mountain, we investigated forest community using belt transect method at 30 sites in Gundal mountain. As the result of important value' calculation on over DBH 2cm, Pinus densiflora (56.8), Quercus mongolica (48.5), Pinus rigida(41.4), Castanea crenata (22.3), Quercus variabilis (22.3), Carpinus laxiflora (16.9), Quercus aliena (11.3), Sorbus alnifolia (8.6), and Quercus acutissima (8.5) were in the order of important value. According to the ordination analysis of Gundal mountain forest, Quercus mongolica was found in north face and high of mountain. Carpinus laxiflora was found in north face steep slope and middle of mountain. As DBH analysis, the study community will be dominated by Quercus species. The correlation between the forest community and environment factor could be thought as distinction by soil nutrition etc., but we need more study about environment factors.

• Journal of the Korean Institute of Landscape Architecture
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• v.25 no.4
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• pp.123-140
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• 1998

The flora of Kunsan Wolmyong park was 77 families, 168 genera, 240 species, 2 subspecies, 35 varieties, 1 formae or 278taxa. Using the Phytosociology method, 12 plant communities were recognized ; Alnus japonica, Pinus densiflora, Pinus thunbergii, Pinus rigida, Castanea crenata, Quercus acutissima, Robinia pseudo-acacia, Alnus hirsuta, Quercus serrata, Aluns firma, Liriope platyphylla and Reynoutria communities. Similarity between different communities was low for most of the cases except for Pinus densiflora, Pinus Thunbergii and Pinus rigida communities kept comparely high with ond another. Species diversity was analyzed by species richness(SR), species diversity index(H') and evenness(J'). Castanea crenata, Robinia pseudo-acacia and Alnus firma communities were higher in SR, H' than the other communities. But Pinus rigida, Quercus acutissima and castanea crenata communities were higher in evenness than the other communities. To investigate the plant community structure and to establish restoration counter plan of a Wolmyeng Park in Kunsan City. As a remedial approach, following is propesed. first, Establishment of an adequate planting plan and development of slope stalilization method by planting native species. second, Sellection of adequate species by planting experiments for pioneer species, native species, and dietary species. third, Landscape planting zones should be managed artificially, the others be managed with ecological approach.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.16 no.3
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• pp.41-53
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• 2013

The study for the estimation potential natural vegetation was estimated the occurrence probability distribution using geographic information system(GIS) in Bukhansan National Park. Correlation and factor analysis were analyzed to estimate probability distribution. Coefficients were calculated by logistic regression analysis. Correlation coefficients were significantly at the 0.01 level. Commonality of elevation, annual mean temperature, warmth index and potential evapotranspiration were high value, but topographic index was low value. Communities of over the 0.3 points distribution probability, Quercus mogolica communities were the largest area, 76,940,900 $m^2$, Pinus densiflora communities area was 860,800 $m^2$, Quercus acutissima communities area was 500,100 $m^2$ and Quercus variabilis communities area was 1,000 $m^2$, but Q. aliena, Q. serrata, Carpinus laxiflora and Zelcova serrata communities was not appeared. Therefore, potential national vegetation of Bukhansan national park was likely to be Q. mongolica community, P. densiflora community, Q. acutissima community and Q. variabilis community.

• Korean Journal of Agricultural Science
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• v.50 no.2
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• pp.207-222
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• 2023

This study investigated 62 nested quadrat plots of Jinaksan to identify community classification and changes of the vegetation by using the phytosocial method and analyzed importance values. Vegetation types were classified into 8 communities: Quercus mongolica community, Q. variableis community, Q. aliena community, Pinus densiflora, Q. acutissima, Zelkova serrata, Carpinis laxiflora, and C. tschonoskii. The significance value was highest in Q. mongolica (62.75) followed by P. densiflora (55.16), Q. variabilis community (25.03), Z. serrata (22.17), Q. aliena (18.30), Prunus serrulata var. pubescens (16.86), C. laxiflora (13.25), Q. acutissima (10.72), C. tschonoskii (10.08), Q. serrata (8.02), Fraxinus sieboldiana (6.93), Acer pseudosieboldianum (6.73), and Styrax obassis (5.73). Quercus mongolica displayed a stable distribution pattern, presenting a reverse J-shaped curve from the diameter at breast height (DBH) analysis, and it was judged that current state would be maintained for a certain period. In addition, P. densiflora is expected to dominate for the time being and Quercus species are expected to gradually decrease.

• Korean Journal of Plant Resources
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• v.26 no.6
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• pp.709-717
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• 2013

The objective of this study was to examine the effect of root pruning intensity in combination with different initial seedling size on the growth of transplanting seedlings of Quercus acutissima. One-year-old seedlings were divided into three groups depending on their height, i.e. small (< 15 cm), medium (25-35 cm) and large size (35 cm <). Root of seedlings was pruned by three intensity such as, leaving 5 cm (severe), 10 cm (medium) and 15 cm (light) of taproot from the root-collar. After one year, we investigated survival rate, height and root-collar diameter (RCD) increment and final shoot dry weight. Also we measured characteristics of newly developed lateral roots such as number, total length, dry weight and diameter. Severe root pruning showed the lowest survival rate in all seedling size. Height increment, RCD increment and shoot dry weight were decreased with increasing intensity of root pruning. Seedlings of medium and light root pruning showed similar above-ground growth and dry weight of lateral roots. More large seedlings showed good survival rate, height increment and final shoot dry mass in all root pruning intensity. Therefore, one-year-old seedlings of Q. acutissima should be pruned taproot by 10 cm and transplanted to obtain excellent performance and increase the efficiency of transplanting work. Based on the findings of this study, it is important that applying to different root pruning intensity depending on initial seedling size for producing 2-year-old seedlings with excellent growth and high quality.