• Proceedings of the Korean Society of Crop Science Conference
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• 2019.04a
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• pp.110-110
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• 2019

• Proceedings of the Korean Society of Crop Science Conference
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• 2019.04a
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• pp.111-111
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• 2019

• Korean Journal of Environmental Agriculture
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• v.31 no.4
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• pp.351-358
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• 2012

BACKGROUND: Constructed wetlands for wastewater treatment are vegetated by wetland plants. Wetland plants are an important component of wetlands, and the plants have several roles in relation to the livestock wastewater treatment processes. The objectives of this study were to investigate the growth characteristics and nutrient absorption of water plants in constructed wetlands for treating livestock wastewater. METHODS AND RESULTS: In this study, livestock wastewater treatment plant by constructed wetlands consisted of $1^{st}$ water plant filtration bed, $2^{nd}$ activated sludge bed, $3^{rd}$ vertical flow(VF), $4^{th}$ horizontal flow(HF) and $5^{th}$ HF beds. Phragmites communis TRINIUS(PHRCO) was transplanted in $3^{rd}$ VF bed, Iris pseudoacorus L(IRIPS) was transplanted in $4^{th}$ HF bed and PHRCO, IRIPS and Typha orientalis PRESEL(THYOR) were transplanted in $5^{th}$ HF. Growth of water plants in constructed wetlands were the highest in October. The IRIPS growth was higher than other plant as 264 g/plant in October. The absorption of nitrogen and phosphorus by IRIS were 3.38 g/plant and 0.634 g/plant, respectively. The absorption of K, Ca, Mg, Na, Fe, Mn, Cu and Zn by water plants were higher in the order of IRIPS > THYOR > PHRCO. CONCLUSION(S): The absorption of nutrients by water plants were higher on the order of IRIPS > THYOR > PHRCO in constructed wetlands for treating livestock wastewater.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.64-64
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• 2022

서리이끼속(Racomitrium Brid.)은 고깔바위이끼과(Grimmiaceae)에 속하며 전 세계에 약 80여종이 알려져 있다. 이 중 한국산 서리이끼속은 18종이 보고되어 있으며, 그 중 6종은 1900년대 초반 한반도에서 최초 발견되어 신종으로 보고되었다. 서리이끼속 이끼류는 주로 양지바른 바위나 사질토양 등에 서식하고, 건조에 강한 것으로 알려져 있다. 원예·조경 분야에서 실내 벽면 및 옥상 녹화용 자원식물로 서리이끼속은 주로 늦은서리이끼(Racomitrium japonicum)와 모래이끼(Racomitrium canescens)가 활용되고 있다. 국내에서도 자원식물로써 선태류에 대한 관심이 증대함에 따라 자생 선태류에 대한 형태적 특징과 함께 생육환경에 대한 정보 제공 요구 또한 증가하고 있다. 이에, 본 연구는 자원식물로 활용이 가능한 한반도산 서리이끼속의 형태·생태적 특징을 파악하고자 하였으며, 기준표본 원산지가 한반도인 서리이끼속 6종을 우선하여 서식 환경 특징을 파악하고자 한다.

• Journal of Food Hygiene and Safety
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• v.39 no.2
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• pp.83-94
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• 2024

The proportion of plant-based meat alternative (PBMA) consumers has recently increased in Korea. This is due to several reasons including protecting the environment, satisfying preferences, maintaining health, and improving eating habits. Accordingly, many companies produce and sell alternative meat using various materials. Alternative meats are classified into plant (such as soybeans and wheat), seaweed, insect, and cultured meats, depending on the raw materials used in manufacturing. PBMA is sold after undergoing processes such as grinding, seasoning, and molding. Therefore, monitoring the presence of any hazardous elements during this process is essential. Accordingly, in this study, we analyzed the harmful components of nine domestically distributed PBMA that are most easily accessible to consumers. After extracting fat from the samples and analyzing the rancidity level, samples F, G, and I were highly rancid. Trace amounts of aflatoxin were detected in samples A and B, but confirmed to be within the range. Cd and Pb were not detected in any sample. We hope that this study will help establish methods to ensure the safety of domestically sold PBMA.

• Plant Disease and Agriculture
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• v.1 no.2
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• pp.31-36
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• 1995

• 한국해양학회지
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• v.24 no.1
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• pp.52-61
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• 1989

The daily net primary production by phytoplankton and ammonium excretion by macrozooplankton (> $350{\mu}m$) were measured to understand the nitrogenous nutrient dynamics in the southern part of the East Sea of Korea. At most of the staions, water columns were well stratified and strongly developed pycnoclines and matching nutriclines could be found near the 20-60m. Total chlorophyll ranged between $1.22-3.24{\mu}g$ ChI/l and nano-fractions of chlorophyll ranged from 43.2 to 99.6% in the surface layer. The daily net primary production by phytoplankton ranged from 0.75 to 2.04 gC/$m^2$/d and averaged to be 1.5 gC/$m^2$/d. 1t is evidenced that the primary production and chlorophyll content are relatively high in frontal waters where the North Korean Cold Water meets with the East Korean Warm Water. The turnover time of nitrate in the euphotic zone ranged from 0.2 day to 1.6 day and averaged to be 0.8 day. The N:P ratio of the study area shows on the average 13.4 which indicates nitrogenous nutrient to be the limiting factor for phytoplankton growth. Ammonium excretion by macrowoplankton averaged out to 1.3mg at-N/$m^2$/d, and contributed 7.3% of daily total nitrogen requirement by phytoplankton in this area. Calculation of upward flux of nitrate to the surface mixed layer from the lower layer approximates 7% of nitrogen requirement by phytoplankton.

• Korean Journal of Ecology and Environment
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• v.41 no.3
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• pp.412-421
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• 2008

Nutrient limitation was examined for the Dongbak Lake based on bioassay experiments and analyses of long-term monitoring data. From the results of data analyses, molar ratios of TN/TP and DIN/DIP were higher than 16 : 1 suggesting that phytoplankton growth was potentially limited by phosphorus. Phytoplankton responded to the addition of phosphates in the incubation experiments for all seasons whereas phytoplankton did not respond to other nutrients such as ammonia, nitrate and silicates. Size fraction (net and nano size) of phytoplankton also responded to the addition of phosphorus indicating that phytoplankton growth was limited by phosphorus in the Dongbok Lake. There was also a taxonomic shift from euglenophyceae to bacillariophyceae after addition of phosphate during warm season especially.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2006.11a
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• pp.283-284
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• 2006

해초지와 해초가 없는 수괴에서 식물플랑크톤의 군집 특성을 비교 분석하기 위하여 해황과 해초지의 규모가 다른 가막만의 원포연안과 여자만의 백일도 주변 해역에서 식물플랑크톤을 채집하고, 수온, 염분, 용존산소, Chlorophyll a와 영양염을 2006년 2월부터 8월까지 조사하였다. 조사 기간동안 해초의 유무에 따른 수온과 염분의 차이는 보이지 않았으나, 용존산소, Chlorophyll a와 영양염 농도는 유의한 차이를 보였다. 또한 거머리말 해초지와 조사 시기에 따른 수온, 염분, 용존산소, Chlorophyll a와 영양염 농도도 유의한 차이를 보였다. 그리고, 원포의 수온은 백일도보다 낮았으나, 염분은 유의하게 높았다. 식물플랑크톤의 현존량과 종조성은 조사 시기에 따라 차이를 보였으며, 현존량은 해초지에서 낮게 나타났다.

• The Science & Technology
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• v.6 no.8 s.51
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• pp.25-28
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• 1973

좁은 면적에서나마 좀더 많은 수확을 얻으려는 노력은 부단히 계속되고 있다. 그러나 인구는 나날이 불어가고 경작면적은 제한되어 있기 때문에 그 문제점은 더욱 커지고 있는 것이다. 소위 재배에 적합하다는 고래로부터의 농경지에서만이 식량생산이 가능한 것일까? 하지만 이는 옛말이 되고 말았다. 모래밭에서 노다지를 캐낼 수 있기 때문이다. 고대 농대의 김용길 교수는 녹색식물의 영양, 생장, 광합성에 관한 능력발휘의 어느한계 이상에서는 토양이 오히려 제한적 인자로 등장한다고 지적하면서 이와같은 단점을 배제한 관권농법과 모래땅의 식물재배법을 연구 발표하였다. 토양의 제한성을 제거하고 근권매지에 새로운 영양환경을 조성하여 작물생산능력을 극대화하자는 것이 김교수의 주장이다.