• Journal of the Korean Society of Tobacco Science
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• v.2 no.2
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• pp.44-50
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• 1980

The growth of flue-cured tobacco was analyzed with the mathematical treatment. The results are summarized as followings: 1. The growth curve was fitted to the quadratic polynomial equation in improved-mulching cultivation, blot to the Gompertz equation in the other cultivations. 2. The initial point of the maximum growth phase for dry weight was about 50 days after transplanting in improved-mulching cultivation, but about 40 days in the other cultivations, and the maximum growth period was for 25 days in all cultivations. 3. The growth rate of the maximum growth period in dry weight decreased in the order of improved-mulching cultivation, mulching cultivation, and non-mulching cultivation. 4. A relative growth amount in the maximum growth period was higher in later sowing. 5. The length of maximum growth was 5 days shorter in leaf area than in dry weight. The maximum growth phase was 7 days earlier in leaf area than in dry weight.

• 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).

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.100-100
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• 2018

물 고추냉이는 십자화과의 숙근성 다년생 초본식물로서 일본과 대만 등에서 재배되며 세계 여러 나라에서 식품, 가공원료, 향신료, 의약소재 등으로 이용되고 있다. 우리나라에서는 철원과 무주 등에서 재배되고 있으나 재배환경 및 기술의 한계로 규모와 생산량은 매우 저조한 실정이다. 따라서 본 연구는 물 고추냉이 순환 베드시스템 개발을 위한 기초연구로 수행되었다. 마사토의 높이와 고랑의 유무에 따라 3개 베드 (A-마사토 높이 4.0cm, 고랑 있음, B-마사토 높이 5.5cm, 고랑 있음, C-마사토 높이 7.0cm, 고랑 없음)로 시험하였다. 물 고추냉이의 생장량과 식물체 내의 양분 분석(질소, 인산, 칼륨)을 분석하였다. 그 결과 베드 높이가 가장 낮고(4cm) 고랑이 있는 베드에서 생장량이 가장 우수하였고 마사토 높이가 가장 높은(7cm) 처리구보다 생장량이 2배 이상 증가하였다. 전체적으로 엽장보다 엽폭이 길었고 심장형 잎의 특성을 그대로 나타내었다. 식물체 내의 양분 분석 결과 처리구 별로 질소, 인산, 칼륨의 함량 차이가 크게 나타났다. A 베드에서 질소 4,150, 인산 500, 칼륨 1,500ppm 에 비하여 C 베드는 질소 730, 인산 120, 칼륨 700ppm 정도로 낮았다. 대조구의 동일 지역, 동일 기간의 계류지 하우스재배(데이터 미발표)에 비해 순환식 베드 재배가 우수하였고, 특히 A 베드에서 가장 우수하여 절수, 2단 재배 등의 예상되는 효과를 감안할 때 물 고추냉이 순환식 베드 재배의 가능성이 충분하다고 판단된다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.30 no.1
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• pp.101-106
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• 1985

A series of experiments were carried out to know the effect of growth retardants on the growth of rice seedlings and ethylene evolution from the rice seedlings. The results suggested that the reduction rate in order of plant height was S-327 > BAS-106 > NTN-821 > PP-333 > CGR-811. The heigher concentration levels of growth retardants applied. the more effective reductions of plant height were found. Ethylene evolution from the rice seedlings was significantly negative correlated with plant hight of of seedlings in all treatments.

• Journal of Wetlands Research
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• v.16 no.4
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• pp.443-452
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• 2014

Feces contain nutrients such as nitrogen and phosphate, potassium and research of the impact on the environment from feces is very diverse. However, despite the importance of mammals to environment, studies of mammals into the terrestrial ecosystems are rare. Korean water deer (Hydropotes inermis) is an endemic species of Korea and China, and we conducted on factor of plant growth in relation to feces of Korean water deer depending on land use patterns. The analysis of growth, biomass and C/N ratio of Zea mays, amount of feces and land use patterns are strongly affecting the C/N ratio and growth of the Zea mays. The quantity of the feces also influences the growth of plants instead of the land use patterns. Furthermore, the feces of Korean water deer have a lower C/N ratio than that of other animals' feces. Being the process of composting, it is able to serve a suitable fertilizer for a crop growth. In this study, we investigated the impact of feces into the environment in the terrestrial ecosystems and we were able to provide the basic data to the resources of an efficient scheme of animal feces. Further research is needed to quantify the materials amongst the plant, soil and animal, and to understand the relationship ecosystem.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2002.11b
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• pp.61-61
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• 2002

This study was excuted to decide the physiological characteristics of Kuehneromyces mutabilis. K. mutabilis was tested to select pertinent substract, temperature and pH range for the growth. Mycelial growth of K. mutabilis was mostly supported on MYPA among other tested synthetic or semi-synthetic media. The temperature range for pertinent mycelial growth was about 25~32$^{\circ}C$ and mostly stimulated at $25^{\circ}C$. And the pertinent pH range of MYPA was 5.0~6.0. The required carbon and nitrogen source for mycelial growth of K. mutabilis was tested. The mycelial growth was mostly stimulated by soluble starch at content. The carbon sources for pertinent mycelial growth was mannose or glucose. And the nitrogen source for pertinent mycelial growth was yeast extract or peptone.

• Journal of Bio-Environment Control
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• v.21 no.1
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• pp.57-65
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• 2012

Fertilization is essential to seedling production in nursery culture, but excessive fertilization can contaminate surface and ground water around the nursery. The objective of this study was to find optimal fertilization practice of container seedling production for reducing soil and water contamination around the nursery without compromising seedling quality. This study was conducted to investigate chemical properties of the growth medium, growth performance, chlorophyll fluorescence, and chlorophyll contents of larch ($Larix$ $kaempferi$) growing under three different fertilization treatments (Constant rate, Three stage rate, and Exponential rate fertilization). Root collar diameter and height of larch were not significantly different among treatments even though the nutrient supply of the exponential treatment was half that of the constant and three stage treatments. Chemical properties of the growth medium showed the same trends as root collar diameter and height. The total biomass and seedling quality index (SQI) were higher at Constant than at other treatments, but both SQI of Constant and Exponential were not significantly different. Photochemical efficiency and chlorophyll contents were lower at Exponential than at other treatments, but not significantly different among treatments. Therefore, Exponential fertilization which is 50% fertilizer of other treatments would maximize seedling growth and minimize nutrient loss.

• Korean Journal of Environment and Ecology
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• v.18 no.1
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• pp.7-17
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• 2004

The objective of this study was to find eco-revegetation measures recycling remnant root-stock of native species which comes to be disused. The monitoring plot was established in Nov.2001 at Honam University's affliated farm that is located in Wolya-Myeon, Hampyeong-Gun, Jeollanam-Do. The plots were monitored 2 times each in Oct.2002 and Sep.2003. Sprout and survival rate of the root-stock including the effect of trunk length, antiseptic treatment, planting season and number of planted were surveyed. The results of the study were as follows Ten tree species including Zelkova serrata among twenty tree species showed outstanding sprout and survival rate (over 90 percent). The growth rate was better in the longer trunk length root-stocks (35cm) than shorter ones (10cm). There was a difference in the size of the root ball when digging the root-stocks. It showed better condition when the root ball sizes were 3 times wide and 5 times deep of the root-stocks or 5 times wide and 5 times deep. Antiseptic treatment on the cuts of the trunk of root-stocks makes a difference in the growth rate. The survival rate of the root-stock showed highest value (100％) when it was transplanted in late autumn (November). And the next best survival rate was reached when it was in early or late spring (March and May)

• Journal of Korean Society of Forest Science
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• v.89 no.3
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• pp.414-421
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• 2000

This study was carried out for the artificial forest stand of 23 years old jack pine(Pinus banksiana Lamb.) in Soheul-myun, Pochun-kun, Kyunggi province of Korea. The objectives of this study were to investigate the stand volume increment and the rate of stand volume, and were to investigate present stand volume to determine annual cutting volume for keeping stand volume to an ideal level for investigated jack pine stand. For a reasonable calculation of stand volume increment, diameter of breast height(DBH), tree height, bark width, and core length for the last 10 years for respective sampling plots were measured. By using these measurements annual diameter increment in DBH class, stand volume increment of 95% confidence interval and tree height curve equation were calculated. The tree height value was derived from the tree height curve equation. Calculation of tree volume by using the tree volume table was made by conferring the tree height value. The summarized results for investigated jack pine trees were having 7.7% annual stand volume increment with 6.1% estimated error. The total stand volume per ha was $79.58m^3$, accordingly the annual stand volume increment was $6.13m^3$ per ha, and the 95% confidence intervals range from 5.77 to $6.51m^3$.

• Journal of Korea Foresty Energy
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• v.19 no.2
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• pp.69-78
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• 2000

This study was conducted to investigate the growth patterns of Maackia amurensis growing in natural forest of Mt. Joongwang, Pyongchang-gun, Kangwon-Do, Korea. The 28 sample plots(30m$\times$30m) wee established to examine the vegetation and environmental conditions for M. amurensis forest. Stem analysis was performed on two sample trees of M. amurensis for each of the 5 plots situated at intervals of one hundred meters by altitude. The results obtained were as follows: ⑴ Height growth of M. amurensis increased with increasing age until 10 years, and then decreased thereafter, especially at altitude of 1,020m. ⑵ M. amurensis showed rapid early growth of height and volume, indicating high biomass production under favorable environment. This growth pattern is typical of pioneer species such as Cornus controversa and Betula costata. ⑶ The rotation age of natural M. amuensis forest was estimated at above 50 years, and especially at about 60 years in 840m above the sea level. ⑷ Growth of M. amurensis increased greatly at about 40 years when released from severe competitions.