• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.362-363
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• 2012

본 논문에서는 한 장의 실제 나무 영상이 주어졌을 시, 사실적인 3차원 나무 모델링(modeling) 및 자가생장(self-growth) 표현을 위한 방법을 소개하도록 한다. 스켈레톤기반의 간략화(skeleton-based abstraction)를 이용하여 동일한 나무 몸통(trunk)을 갖는 다양한 나무 모델생성과 함께 나무의 다면체구조(manifold structure)를 고려한 지오데식 커널(geodesic kernel)을 이용하여 나무의 자가생장을 표현한다. 나무의 자가생장은 사전 정의된 나무 굵기, 전체 크기, 그리고 가지증식 순서정보와 같은 상대적 성장정보(allometric information)를 동시 이용하여 상대적인 나무 생장(allometric tree growth)을 표현하도록한다. 한편, 보여지지않는 나무 가지와 잎들에 대해선, 나무구조는 로컬하게 자기유사성(local self-similarity)을 갖는다라는 고전적인 절차적(conventional procedural) 가정을 이용하여 자동적으로 생성토록한다. 실제영상을 이용한 몇몇들의 실험을 통해 보다 효과적으로 나무 모델 및 생장 표현이 가능함을 보여주도록한다.

• Korean Journal of Agricultural and Forest Meteorology
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• v.3 no.2
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• pp.105-113
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• 2001

This study was conducted to reveal the effects of local climatic conditions on the vegetative growth in a mature stand of Korean white pine based on climatic estimates. For this, the annual increments of stand variables such as DBH, height, basal area and volume were measured and estimated for seven years from 1974 to 1980. The local climatic conditions in the study site were also estimated by both a topoclimatological method and a spatial statistical technique. The local climatic conditions were then correlated with and regressed on the growth factors to reveal the relationships between the climatic estimates and the growth. It is found that relatively high temperatures had positive effects on the diameter growth. The yearly diameter growth increased when each of mean, maximum, and minimum temperature during the growing season was high. Height growth showed positively significant correlation with three climatic variables. The most important variable influencing height growth was the average of maximum temperature for 10 months from January to October. It means that the higher the average of maximum temperature for 10 months from January to October is, the more height growth of Korean white pine increases. Other climatic variables related to height growth were average of minimum temperature for 3 months in the early growing season and mean relative humidity for the growing season. Six climatic variables related to temperature had effects on basal area increment and all of them were positively correlated with basal area increment. Especially, temperatures from January to March were important factors affecting the basal area increment. In volume increment, high correlation was also recognized with most of temperature variables. This tendency was the same as the results in diameter and hight increments. This means that the volume growth increases when temperatures during the growing season are relatively high.

• Journal of Mushroom
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• v.12 no.4
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• pp.363-366
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• 2014

This study was focused on finding a relationship between fruit-body growth and relative humidity in Neolentinus lepideus cultivation. The higher the relative humidity, the moisture content of pileus and stipe were also tends to be increased. The day of formation of primordia and development of fruit body was shortest at the relative humidity 95%. The yield and commercial yield were higher in the relative humidity 95% than in the other treatment. Individual weight of fruit body was the highest at the relative humidity 75% and 85%. Crack indices of pileus was the strongest at the relative humidity 65%.

• Journal of Korean Society of Forest Science
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• v.102 no.3
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• pp.455-462
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• 2013

The objectives of this study were to compare soil physical and chemical properties and early growth of Pinus densiflora and Larix kaempferi seedlings in harvested Larix kaempferi and Pinus rigida stands. Study stands were located in harvested L. kaempferi (Yeongju) and Pinus rigida (Wonju) plantations. Seedlings of L. kaempferi (1-1) and P. densiflora (1-0) were planted in April, 2008, Yeongju. Also, seedlings of L. kaempferi (1- 1) and P. densiflora (1-1) were planted with the density of 3,000 seedlings/ha in April, 2010, Wonju. We analyzed soil physical and chemical properties and the relative growth rate of seedlings using diameter at root collar and seedling height. Soil organic matter, total nitrogen and available phosphorus concentrations in harvested P. rigida stand were significantly higher than those in harvested L. kaempferi stand. The relative growth rate of P. densiflora seedlings with former stands were not significantly different. The relative growth rate of diameter at root collar of L. kaempferi seedling in harvested P. rigida stands were significantly higher than that in harvested L. kaempferi stand. Higher concentrations of organic matter, total nitrogen and available phosphorus in harvested P. rigida stand was probably positively affect to the early growth of seedlings.

• The Korean Journal of Ecology
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• v.24 no.3
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• pp.125-130
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• 2001

The allelopathic effects of aqueous extracts from Trifolium repens were studied. Aqueous extracts of leaves, stems, roots and flowers of T. repens strongly inhibited the seed germination and seedling growth of Zoysia japonica. In general, the higher concentration of the extracts showed the more great inhibition effect. The phenolic compounds extracted from T repens were analysed and identified using gas chromatography. 14 phenolic compounds were isolated from the leaves, stems, roots and flowers: caffeic acid, p-hydroxy benzoic acid, ferulic acid, gallic acid, p-coumaric acid, vanillic acid, trans-cinnamic acid, 2,5 dihydroxy benzoic acid, syringic acid, 2-hydroxy cinnamic acid, benzoic acid, salicylic acid, phloroglucinol and phanylacetic acid. The seed germination and relative growth ratio of Z. japonica by 14 phenolic compounds were inhibited in whole treatment. Stronger growth inhibitor were benzoic acid, salicylic acid and trans-cinnamic acid. From these results it is suggested that the phenolic compounds from T. repens seemed to be responsible for the allelopathic potential.

• Journal of Korean Society of Forest Science
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• v.95 no.1
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• pp.131-138
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• 2006

This study was conducted to assess the diameter growth patterns of Quercus mongolica and Quercus variabilis dominant species in natural deciduous forests in Korea. The diameter growth data were collected from 83 destructively sample trees for stem analysis in Gangwon-Do region. The relationship between diameter growth and 14 tree measurements was also analyzed. The average diameter growth rate of dominant trees for both species increased until ages of 15-20 years, and exhibited generally constant trend for subsequent ages. The diameter growth rate of both species ranged from 0.09-0.83 cm/yr across the all ages. Average annual diameter growth for last 5 measurement years was 0.28 cm/yr for Quercus mongolica and 0.27cm/yr for Quercus variabilis. The observed growth rate decreased with decreasing crown class. The difference between diameter growth rates for different crown classes was only statistically significant (p<0.0001) for Quercus mongolica. Pearson correlation coefficient between the diameter growth rate decreased with relative diameter (r=0.64), relative height (r=0.61), exposed crown area (r=0.58) and total crown area (r=0.56) for Quercus mongolica. For Quercus variabilis, Pearson correlation coefficient decreased with dbh (r=0.57), crown width (r=0.55), age (r=0.39), competition index (r=-0.39), and height (r=0.35).

• Journal of The Korean Society of Grassland and Forage Science
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• v.17 no.4
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• pp.345-350
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• 1997

Using modified Lincoln solution, hydroponic system was developed to compare simultaneously a range of pasture species in terms of relative growth rate(RGR), rate of roots to shoots, and relative root volume and root area. Modified Lincoln solution achieved optimum growth of nineteen forage species tested, and was proved to be a good method for studying plant root characteristics. RGR was measured sucesshlly showing reasonably consistant values over time. There was a much differences in rootkhoot ratio between species within groups as between groups. Root tissue density was lower in grasses than legume or herb group. Root area index was very high for grasses and herbs, and this index should be useful for evaluating the comparative root system of different species.

• Journal of Korean Society of Forest Science
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• v.77 no.2
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• pp.193-198
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• 1988

This study was carried out to investigate the influence of shading pretreatment and planting density on the periodic needle leaves growth in fresh and dry weight. 1. The fresh and dry weight growth of needle leaves per seedlings increased with light intensity and decreased with increase of density. The best growth of needle leaves in fresh weight and dry weight appeared during the period from May to June. 2. The contribution rates to the growth of fresh and dry weight of needle leaves were 1.9% and 5.1% in light intensity, 3.6% and 3.2% in density and 83.7% and 75.6% in growth period, respectively. 3. For the three factors, shading, density and growth period, all the interactions between any two factors, and among the three factors in the fresh and dry weight growth of leaves per plant were significant.

• Korean Journal of Organic Agriculture
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• v.11 no.1
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• pp.55-66
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• 2003

This study was carried out to investigate the effects of different plant growth media on the growth of tomato(Lycopersicum esculentum Mill.) seedlings during growth stages. The media were commercial plant growth medium 100％, earthworm cast (that was produced by vermicomposting of food waste and cattle manure) 100％, earthworm cast 50％ ＋ vermiculite 50％, earthworm cast 50％ ＋ perlite 50％, earthworm cast 40％ ＋ vermiculite 30％ + perlite 30％. Plant length(mm), number of leaves, leaf area($\textrm{cm}^2$), stem diameter(mm), plant dry mater were greatest till the 2nd week growth stages in the commercial plant growth medium plots, but those were higher in the earthworm cast than those in the other plant growth media at the later stages of this study(P<0.05). And relative growth rate of biological yield, relative growth rate of shoot and relative growth rate of root were highest in the earthworm cast till the 4th week growth stage. Therefore it can be implied that there is the possibility of potential utilization of earthworm cast, which was produced by vermicomposting of food waste and cattle manure, as vegetable growth medium.

• Journal of Korean Society of Forest Science
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• v.76 no.1
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• pp.1-10
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• 1987

This study was carried out to examine the influence of shading and root-cutting on the survival and growth of Pinus koraiensis seedlings. 1, The highest survival percentage of seedlings transplanted to transplanting bed appeared at the plot of 19% in shading. The 50% of the seedlings were survived if half of them were root-cutting. 2. Shoot elongation, root growth and diameter increment were the best at the plot of 100% in relative light intensity. However, those were the best at the plot with 1/4 root cutting. 3. The increase of needle fascicle number and the growth of needle surface area per seedling were the longest at the plot of 63% relative light intensity. Among root cutting treatments the 1/4 cutting plot showed the largest growth of needle areas.