• Korean Journal of Environment and Ecology
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• 제36권6호
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• pp.662-675
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• 2022

This study was intended to investigate and analyze the current status of the plant community structure in order to provide basic data for the systematic conservation and management of the Buxus sinica area appearing on the ridgeline connecting the Gyeokjabong(Mt.) and Keungiljae, on Bogildo Island. In consideration of location characteristics such as density, topography, and direction of B. sinica appearing in the shrub layers, a total of 26 sites were set as the survey area for representative vegetation communities or areas with changes in topography. According to DCA and TWINSPAN, it was classified into 6 communities, namely Carpinus turczaninovii-Deciduous broad-leaved, C. turczaninovii, C. turczaninovii-B. sinica, C. turczaninovii-Evergreen broad-leaved, Q. acuta, and D. trifidus-Q. acuta. The community dominated by C. turczaninovii maintains the status quo for the present moment, however, Q. acuta will dominate the surrounding area in the long term, so Q. acuta has high succesion potential. In the case of the Q. acuta and D. trifidus-Q. acuta communities, Q. acuta, known as the climax species of warm-temperate forests, will maintain dominant status. In a case of B. sinica, the community dominated by C. turczaninovii will remain in good status due to the topographical conditions, but the community dominated by Q. acuta growth difficulties are expected due to the high coverage. In the relationship between environmental factors and vegetation distribution, analysis showed that only soil pH affect vegetation distribution. Furthermore, the soil acidity (pH) was 3.78-5.30, the electrical conductivity was 0.186-0.543 dS/m, and the organic matter content was 2.25-2.89%.

• Korean Journal of Soil Science and Fertilizer
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• 제10권4호
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• pp.245-256
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• 1978

The effects of different particle size distribution of fused phosphate on the changes of phosphorus content in soil and plant, growth and yield of paddy rice were investigated through pot and field experiments. The following results were obtained. 1. Negative correlation was found between unhulled rice yield and the composition of fused phosphate whose particle size was larger than 28 mesh, and 65 to 150 mesh, and highly significant correlation was found between unhulled rice yield and the composition of fused phosphate whose particle size was 28 to 48 mesh. But no significant correlation was found betweeen unhulled rice yield and the composition of fused phosphate whose particle size was 48 to 65 mesh. Thus the composition of 56% of 28 to 48 mesh particles and 44% of 48 to 65 mesh particles would give the best effect. 2. In the soil of the Jeonbug series rice plant in the plots treated with fine single textured fused phosphate showed poor early growth, i.e. poor tillering and short plant height. But at harvesting stage it showed rather increased number of tillers and higher plant height. Of the composite fused phosphate the more particles of 28 to 48 mesh it had, the better growth it showed. In the soil of the Yesan series rice plant in the treated plots showed much better tillering and higher plant height in contrast with that in the control plots. Of the single textured fused phosphate the finer particles showed better growth, while of the composite fused phosphate the more particles finer than 48 mesh it had, the poorer the tillering. 3. The content of available phosphorus in the soil tended to increase as the particles of both single textured and composite phosphate became finer. The soil phosphorus content decreased as the content of phosphorus absorbed by rice plant increased at each stage of growth, and the amount of soil phophorus decreased became larger as the the particles were finer. The amount of available phosphorus in the treated soils was larger in the soil of the Yesan series than in the soil of the Jeonbug series which was a long cultivated soil and contained relatively high phosphorus. 4. In the single textured fused phosphate the amount of phosphorus absorbed by rice plant tended to increase as the particles were finer, and great difference was found at heading stage, but at harvesting stage little difference was found for all the plots. In the field experiment in the soil of the Jeonbug series more phosphorus was absorbed by rice plant in the plots treated with the composite fused phosphate of higher content of 28 to 48 mesh particles. In the pot experiment the amount of phosphorus absorbed by rice plant was highest in the plots treated with the composite fused phosphate of 53.35% of particles larger than 48 mesh and 46.6% of particles smaller than 48 mesh. In the pot experiment in the Yesan series the amount of absorbed phophorus was highest in the plots treated with the fused phosphate of 47.75% of particles larger than 48 mesh and 50. 216% of particles smaller than 48 mesh. 5. A reverse relationship was found between the absorbed phosphorus and silica. In the pot experiment in the soils of both the Jeonbug and Yesan series the amount of phosphorus absorbed by rice plant increased as the particles were finer, while the amount of absorbed silica tended to decrease.

• Korean Journal of Agricultural and Forest Meteorology
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• 제4권2호
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• pp.65-71
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• 2002

The best environments such as crown density, temperature, light intensity and humidity have to be identified because these factors are strongly related to the growth and several physiological characteristics. The purposes of this study are \circled1 to collect basic data fer growth, \circled2 to identify the best growth environments. to achieve these purposes, oak, pine and mixed forest stands have been selected in this study. forest ginseng seeds were sown in these forest four years ago. Several environmental and growth factors have been surveyed. In general, mean tree age, DBH and average height are 20-25 years old, 14-17 cm and 7-9 m, respectively. The growths of forest ginseng grown in oak stand are better than those of pine and mixed stands.

• Korean Journal of Environment and Ecology
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• 제14권1호
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• pp.80-87
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• 2000

구상나무림 보전관리의 기초자료를 마련하고자 지리산 한라산 및 덕유산의 아고산지대에 95개의 조사구를 설치하여 한국특산종 구상나무의 생육현황과 구상나무 서식지의 입지인지를 조사하였다 구상나무는 흉고직경 10-30cm의 범위에 드는 나무들이 주로 고사목으로 나타났으며 고사목의 비율은 전체적으로 총개체수의 11.51%였다 고사목의 비율또한 덕유산에서 18.18%로 가장높게나타났고 한라산 지역이 8.11%로 가장 낮게 나타났다 조사구당 구상나무 개체수 치수의 개체수 구상나무의 수고와 흉고직경 생육현황표에 의한 점수 구상나무의 상대밀도 등은 지역간에 통계적 유의차가 인정되었다 생육중인 구상나무의 활력은 한라산 지리산, 덕유산으로 순으로 좋았다 조사구당 구상나무 치수의 개체수는 한라산에서 6.00개체로 가장 많았으며 덕유산에서는 치수가 없는 것으로 나타났다 구상나무의 상대밀도도 한라산, 지리산, 덕유산 순으로 높게 나타났다. 조사구당 구상나무 개체수는 해발고와 정의 상관, 방위, 낙엽퇴의 두께, 조사구당 교목의 개체수 및 종수, 활엽수 상대밀도와는 부의 상관이 인정되었다. 구상나무 상대밀도는 해발고와는 고도의 정의 상관관계 방위 조사 구당교목의 개체수 및 종수 수관울폐도, 활엽수 상대밀도와는 부의 상관관계가 인정되었다 지리산, 한라산 및 덕유산에 자생하는 구상나무는 해발고가 높으며 볕이 잘들고 낙엽퇴가 얕으며 종구성이 단순하고 활엽수가 적은 지역에 보다 많이 분포한다.

• Horticultural Science & Technology
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• 제17권6호
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• pp.753-754
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• 1999

Application of compost to vineyards reduced nitrogen absorption into vine roots, increased soil nitrogen content, soil pH, soil organic matter, and fine roots density. Long pruning reduced the growth of 'Campbell Early' of Wakeman's training system. Maintaining proper vine shape was very difficult because long pruning decreased the vine growth. In conclusion, the application of compost to 'Campbell Early', 'Kyoho', 'Sheridan' vineyard decreased vine growth, increased soil organic matter, soil pH and favored the rhizosphere condition and the growth of fine roots increased.

• Korean Journal of Medicinal Crop Science
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• 제11권3호
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• pp.212-215
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• 2003

There were so many Asparagus cochinchinensis (Lour.) Merr. in the past in Korea. Now a day, it is under diminishing circumstance because of over exploitation for pharmacy materials. The amount of domestic market demand of it was imported. The autochthonous planting areas were mainly surveyed along coastal region and island. Autochthonous A. cochinchinensis was mainly distributed in sea shore below 1km from sea and founded 26 regions among 45 surveyed regions. Northern and eastern limited distribution of A. cochinchinensis was $N36^{\circ}15'$ in the west coast and $E128^{\circ}02'$ in the south coast of Korean peninsula, respectively. But it was not founded in the east coastal region. Dominant vegetation of surveyed area was pine with shrub. The number of tuberous roots of A. cochinchinensis growing in good light penetration was more than growing in bad light penetration.

• Korean Journal of Medicinal Crop Science
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• 제7권3호
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• pp.177-184
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• 1999

This study was carried out to find growth characters and distribution of above and underground in natural crossed population of Paeonia lactiflora Pallas. Sprouting time was 1 April to 15 April, and distribution of stem length ranged from 21 to 80cm, and 3 to 18 in stem number. Distribution of root length ranged from 12 to 59cm, root number per plant was 73 to 4, root yield per plant was highly varied by 37 to 882g, and larger root above 750g was occupied by 7.1%. Paeoniflorin content was 1.9 to 10.29% and plants containing higher paeoniflorin was 14.3%. Root length and yield had highly positive correlation. Root diameter and stem length was also positively correlated.

• Proceedings of the Korean Society for Applied Microbiology Conference
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• 한국미생물생명공학회 1978년도 추계학술대회
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• pp.208.3-208
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• 1978

공장폐수 및 오이로 부터 납에 내성이 강한 한 균주를 분리하여 이 균주의 생리적 특성과 생육도를 검토하였으며 아울러 본 균주의 균체내에 납의 축적과 분포를 조사하고 균체의 세포내 미세구조 변화를 전자현미경으로 관찰하였다.

• Korean Journal of Soil Science and Fertilizer
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• 제35권1호
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• pp.1-11
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• 2002

Root distribution was monitored in the root zone of corn fields on several soil series in central Illinois during three growing seasons in order to find the effect of soil series and tillage system on root growth. A minirhizotron technique was used to videotape each soil profile in weekly intervals to a depth of 75 cm under conventional tillage (CT) and no tillage (NT) systems of cultivation. Root distribution near soil surface generally increased during the early stages of the growing season, but declined as surface soil moisture was depleted in late summer. Even though root distribution was not significantly different between soil series in this experiment. differences in root distribution between soil series were associated with the increases in root-available water storage capacity. Root population in the top 30 cm of NT plots. where increased water infiltration rates and saturated flow of soil moisture into the subsoil, was generally higher than that of CT plots in Illinois corn fields. Foots appeared in the deeper layers later in the growing season, with root penetration into subsoil layers occurring as much as 2-3 weeks earlier on the NT plots than in CT plots. In conclusion, root distribution was significantly affected by the tillage systems, but not different by soil series.

• KOREAN JOURNAL OF CROP SCIENCE
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• 제53권spc호
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• pp.89-95
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• 2008

This study was carried out to examine growth characteristics and seed qualities of 1,296 Korean soybean landraces. The range of days to flowering, and days to maturity was 38 to 83 days and 47 to 102 days, respectively. The range of growth days were 105 to 160 days, and 38% was belonged to maturity group III. The 100 seed weight was 19.5g, showing the range of 2.4 g to 40.4 g, and 19.5 g in mean. 35.3% was in the range from 13.1 g to 20.0 g, and 29.4% in the range from 20.1 g to 25.0 g. Mean contents of crude protein was 41.8%, showing the range from 32.7% to 49.2%. Mean contents of crude oil was 18.0%, showing the range from 11.8% to 22.2%. The composition of unsaturated fatty acids were from 81.8% to 94.2%, and 85.4% in mean. Sucrose contents were in the range from 1.24% to 7.91% with the mean 5.21%, and oligo-saccharide contents from 2.45% to 11.13% with the mean 8.01%. Total isoflavone contents were in the range from $278.4\;{\mu}g/g$ to $2,736.9\;{\mu}g/g$ with the mean $1,066.8\;{\mu}g/g$. Among isoflavone contents, daidzein, glycitein, and genistein contents were in the range from $48.8\;{\mu}g/g$ to $1,709.6\;{\mu}g/g$ with the mean $483.2\;{\mu}g/g$, from $0.98\;{\mu}g/g$ to $892.3\;{\mu}g/g$ with the mean $111.6\;{\mu}g/g$, and from $79.8\;{\mu}g/g$ to $1242.3\;{\mu}g/g$ with the mean $472.0\;{\mu}g/g$, respectively.