• 한국약용작물학회지
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• 제26권3호
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• pp.240-247
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• 2018

Background: Saline soil has negative effects on the growth of most crops. Sodium is the main element that causes salt accumulation in soil. Organic materials such as cow and poultry manure, are frequently used during the preparation stage, which causes an increase in the rate of salt accumulation in the soil. Methods and Results: To investigate the influences of sodium on ginseng, $NaH_2PO_4$, $Na_2SO_4$, and NaCl were used to adjust the sodium concentrations at 0, 12.5, 25, 50, 75 and 100 mM in nutrient solution. In a 2-year-old ginseng, toxic symptoms appeared when the sodium treatment exceeded 50 mM. The sodium concentration in the leaves was 3.33%, which is more than twice as high as that of the control treated at 50 mM. As the sodium concentration increased, the root weight significantly decreased. In the 100 mM treatment, the weight decreased by 28% when compared to that of the control. The Amount of ginsenoside significantly increased with an increase in sodium concentrations. Conclusions: These results suggest that the growth of 2-year-old ginseng is negatively affected when sodium exceeds 50 mM. This result can be used for a as basis in diagnosing the physiological disorders of ginseng.

• 한국식생활문화학회지
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• 제16권4호
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• pp.269-275
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• 2001

The present research was designed to collect recipe of set up a standard recipe and analyze the nutrients of broiled black goat meat (a kind of native local foods in Busan and south province). The results of the study are summarized as follows. The recipe for goat(lamb) meat was recorded in Sanlimkyounggae and Jungbosanlimkyounggae between 1715 and 1827. The goat meat was explained as food for health, rejuvenation and recuperation Since late 1800, it has been utilized for such use. The flavor of broiled black goat meat is influenced by seasonings, fruit juice, heating treatment and cooker. And it also could be affected by the method of slaughter and the sex of the goat. There are lot of element in seasoning. Red pepper paste, garlic and ginger holdback the bad smell and make the taste better. Onion help to retain the water and improve the flavor. Starch syrup, sugar and sesame oil make the meat smoother, glossier and more tasty. The meat is usually roasted on grill over charcoal. It helps to remove or suppress the bad smell and make the taste better. Softness and scent of the meat depend largely on the way to butcher. Female goat meat tastes smoother and smells better. Fruit juice also improve the softness of the meat. Energy per 100g of the 'broiled black goat meat' is 170kcal. There are protein (23g), fat(2.4g), Ca(159mg), Fe(1.1mg) and so on. Amino acid is mainly comprised of essential amino acid such as cystine, lysine, leucine, and arginine. Fatty acid consists primarily of unsaturated fatty acid like oleic acid, linoleic acid.

• 한국자원식물학회지
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• 제24권1호
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• pp.89-97
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• 2011

새로운 노지 월동작물과 수출유망 작물을 개발하기 위하여 shallot을 도입하여 적응력 시험을 수행하고 있는 과정에서 몇 가지 문제점이 발견되었다. 이러한 문제를 해결하고 질소 시비량과 추비 시기가 shallot의 생육에 미치는 영향에 대해 조사하기 위해 수행하였다. 질소 시비량은 10 a 당 24 kg이 적당하였고, 추비는 2월과 3월에 각각 1회씩 시용하는 것이 효과적이었다. 질소 시비량이나 추비 시기에 따른 식물체의 무기성분 함량은 차이가 없었다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2010년도 학술발표회
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• pp.1079-1083
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• 2010

하절기에 집중되는 강우로 인해 국내의 경우 저수지와 댐 건설이 불가피 하였으며, 이들 구조물에 의한 수체의 거동 및 수질의 분포 또한 일반 하천과는 다른 특성을 지니고 있다. 특히, 흐름 방향보다 수심 방향으로의 특성이 강하게 작용하는 호소에서는 3차원 수리 수질 모델링을 적용함으로써 모의 결과에 대한 신뢰성을 높일 수 있다. 하천의 발원지로서의 댐(저수지)과 하천과 하천사이에 위치한 저수지의 특성이 다르며, 하천 사이에 위치한 저수지의 경우, 하천과 하천을 이어주며 그 흐름특성과 수질의 분포 및 변화의 양상의 바뀐다는 점에서 독립적이며, 연계되는 구조의 특징을 동시에 반영할 수 있어야 한다. 본 논문에서는 낙동강에 위치한 남강댐(진양호)를 중심으로 연구를 진행하였으며, 안동댐 등처럼 하천의 발원지가 아닌 하천과 하천 사이에 위치한 호소(댐)으로 이와 같은 특징을 반영하여 수질오염총량관리제에서의 목표수질 달성여부와 점 및 비점오염원에서 발생되는 오염부하량의 변화에 따른 저수지 내의 수리 수질 모의를 EFDC-WASP의 연계 모델을 통해 연구하고자 하였다.

• 농업생명과학연구
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• 제45권6호
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• pp.47-55
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• 2011

This study investigated mineral element concentrations of acorns in Quercus acutissima and Quercus serrata seed orchard, so that to estimate the variation of these species based on the chemical composition in different clones from plus trees. The acorns were collected from ten clones of each species grown in the same clonal seed orchard. The nutritional concentration of acorns was significantly different between the clones and species. The concentration of nutrient for the whole acorn followed in this general sequence: P > K > Na > Mg > Ca > Mn > Fe > Zn > Cu. The mineral concentrations of acorns in clones of Q. acutissima and Q. serrata contained P (494 to 684 and 541 to 672 mg/100 g), K (114 to 569 and 140 to 251 mg/100 g), Na (57 to 121 and 49 to 85 mg/100 g), Mg (29 to 37 and 26 to 42 mg/100 g), Ca (10 to 53 and 26 to 68 mg/100 g), Mn (0.5 to 3.4 and 1.8 to 4.5 mg/100 g), Fe (0.7 to 1.1 and 0.0 to 2.2 mg/100 g), Zn (0.34 to 0.81 and 0.38 to 0.84 mg/100 g), and Cu (0.13 to 0.40 and 0.09 to 0.34 mg/100 g) respectively. Even though acorns of Q. serrata are smaller in size than Q. acutissima, acorns of Q. serrata contained significantly higher concentration of phosphorus, calcium, iron and manganese than Q. acutissima. Based on the mineral composition of the acorns, this study has shown that the clones of Q. acutissima and Q. serrata have different ability to accumulate mineral nutrients which could indicate the variation of Quercus species in terms of mineral acquisition and accumulation.

• 한국물환경학회지
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• 제35권1호
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• pp.19-27
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• 2019

The purpose of this study is to evaluate the water quality and phytoplankton community in Bukhan River which account for 44.4 % of the total inflow into Lake Paldang, using multivariate statistical techniques (i.e., correlation analysis, principal component analysis (PCA)/factor analysis (FA)). Water samples were collected from March to November 2015 and the following parameters measured; water temperature, pH, DO, EC, SS, BOD, Chl-a, COD, TN, $NO_3-N$, $NH_3-N$, TP, DTP, $PO_4-P$, and phytoplankton community. The water quality of the main stream and the tributaries were not significantly different apart from the relatively high concentration of BOD, COD and nutrients recorded in MH. The highest cell density of Stephanodiscus hantzschii and Merismopedia glauca dominated phytoplankton was observed in PD. Based on the correlation analysis, total phytoplankton and cyanophyceae were highly correlated with BOD, COD and nutrients. PCA/FA resulted in four main factors accounting for 82.240 % of the total variance in the water quality dataset. The group of component 1 (TN, DTN, DO, $NO_3-N$, water temperature) and component 2 ($PO_4-P$, T-P, DTP, SS) were classified as nutrient element factor whereas component 3 (Chl-a, COD, BOD, $NH_3-N$, pH) was related to organic substances. Hence, the identification of the main potential environmental pollution factors in Bukhan River will help policy makers make better and more informed decisions on how to improve the water quality.

• 농업과학연구
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• 제49권4호
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• pp.697-706
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• 2022

The effect of varied light intensities on the growth of daughter plants during propagation and after transplant to raised beds were examined in 'Sulhyang' strawberry. To this end, four treatments in controlling solar radiation inside a plastic house were made: 55% retractable shading and 35, 55, and 75% fixed shading. The plastic house was shaded only from 11:00 to 16:00 in June and 10:00 to 16:00 in July to September for the treatment of 55% retractable shading. The mean solar radiation inside the plastic house in the retractable 55% shading treatment was 317 W·m^-2 and those in the 35, 55, and 75% fixed shading treatments were 183, 165, and 116 W·m^-2, respectively, at 10 o'clock in the morning. The 55% and 75% fixed shading resulted in taller daughter plants with wider leaf areas than 55% retractable shading. The retractable shading also showed higher leaf numbers, crown diameters, root weights, and fresh weights compared to fixed shading treatments. Regarding the inorganic element contents, daughter plants grown under 75% fixed shading had 1.35% total nitrogen content followed by 1.19% in 35% fixed shading, 1.14% in 55% fixed shading, 1.14% in open culture, and 1.10% in 55% fixed shading. After 54 days following the transplant of daughter plants to a raised bed, the fresh weight of the aboveground part was the heaviest in the 55% retractable shading and non-shading treatments. The 75% fixed shading treatment had the lowest fresh weight of the aboveground plant parts. The results of this study could be used for the production of high-quality daughter strawberry plants.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2019년도 정기학술대회 발표논문집
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• pp.134-134
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• 2019

Utilization of organic waste as a renewable energy source is promising for sustainability and mitigation of climate change. Pyrolysis converts organic waste to gas, oil, and biochar by incomplete biomass combustion. Biochar is widely used as a soil conditioner and adsorbent. Biochar adsorbs/desorbs metals and ions depending on the soil environment and condition to act as a nutrient buffer in soils. Biochar is also regarded as a carbon storage by fixation of organic carbon. Phosphorus (P) and nitrogen (N) are strictly controlled in many wastewater treatment plants because it causes eutrophication in water bodies. P and N is removed by biological and chemical methods in wastewater treatment plants and transferred to sludge for disposal. On the other hand, P is an irreplaceable essential element for all living organisms and its resource (phosphate rock) is estimated about 100 years of economical mining. Therefore, P and N recovery from waste and wastewater is a critical issue for sustainable human society. For the purpose, intensive researches have been carried out to remove and recover P and N from waste and wastewater. Previous studies have shown that biochars can adsorb and desorbed phosphates implying that biochars could be a complementary fertilizer. However, most of the conventional biochar have limited capacity to adsorb phosphates and nitrate. Recent studies have focused on biochar impregnated with metal salts to improve phosphates and nitrate adsorption by synthesizing biochars with novel structures and surface properties. Metal salts and metal oxides have been used for the surface modification of biochars. If P removal is the only concern, P adsorption kinetics and capacity are the only important factors. If both of P and N removal and the application of recovery are concerned, however, P and N desorption characteristics and bioavailability are also critical factors to be considered. Most of the researches on impregnated biochars have focused on P removal efficiency and kinetics. In this study, coffee waste is thermally treated to produce biochar and it was impregnated with Mg/Al to enhance phosphates and nitrate adsorption/desorption and P bioavailability to increase its value as a fertilizer. Kinetics of phosphates and nitrate adsorption/desorption and bioavailability analysis were carried out to estimate its potential as a P and N removal adsorbent in wasewater and a fertilizer in soil.

• 생물환경조절학회지
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• 제27권2호
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• pp.173-179
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• 2018

상토에 기비로 혼합된 질소 시비수준 차이가 '녹광' 고추의 플러그 묘 생장에 미치는 영향을 구명하기 위해 본 연구를 수행하였다. 코이어더스트, 피트모스 그리고 펄라이트를 용적기준 35, 35 및 30%로 혼합한 상토를 조제할 때 질소를 0, 100, 250, 500, 750, 1,000 및 $1,500mg{\cdot}L^{-1}$로 농도를 조절하여 첨가하였고, 질소를 제외한 필수원소는 모든 처리에서 동일한 농도로 조절하였다. 비료를 포함한 상토를 50-cell 트레이에 충진한 후 종자를 파종하였다. 파종 후 매주 pH와 EC 측정, 파종 0, 3 및 7 주 후 상토의 다량원소 농도 분석, 그리고 파종 7주 후에 지상부 생장 조사와 식물체 무기원소 함량을 분석하였다. 파종 전 상토의 pH는 질소수준별 차이가 크지 않았지만 육묘기간이 길어질수록 처리간 차이가 커지는 경향이었다. 상토의 EC는 파종 전 질소 시비수준별 뚜렷한 차이를 보였지만, 파종 4주 이후부터 처리간 차이가 적어졌고, 7주 후에는 모든 처리에서 유사한 수준으로 측정되었다. 상토 추출용액의 $NH_4-N$ 및 $NO_3-N$농도는 EC와 유사한 경향을 보이며 낮아졌고, 다량원소농도 역시 파종 3주 이후에 감소폭이 더 커졌다. 파종 후 7주 후 조사한 고추 유묘의 지상부 생장은 500 및 $750mg{\cdot}L^{-1}$ 처리구에서 우수하였으며, $1,000mg{\cdot}L^{-1}$ 이상의 처리구에서는 질소 무시비구와 비슷한 수준으로 생장이 저조하였다. 파종 7주 후 분석한 식물체내 N 함량은 질소 시비수준이 높아질수록 직선적으로 증가하였으며, 지상부 생장이 우수하였던 500 및 $750mg{\cdot}L^{-1}$ 시비구가 각각 5.13 및 5.31%로 분석되었다. 이상의 결과를 고려하였을 때 고추의 유묘 생장을 위해서는 기비로서의 질소시비수준을 500 또는 $750mg{\cdot}L^{-1}$으로 조절하는 것이 바람직하며, 건물중에 기초한 N 함량이 5.1~5.3% 수준으로 시비농도를 조절하는 것이 바람직하다고 판단하였다.

• 한국토양비료학회지
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• 제38권5호
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• pp.274-280
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• 2005

남부해안지역의 굴 양식장에서 배출량이 날로 증대되고 재활용도가 낮아 지역적으로 문제가 되고 있는 굴 패각으로부터 제조된 굴패화석 비료의 농업적 활용성을 평가하기 위해 봄배추의 수량, 그리고 토양의 이화학적 특성에 미치는 영향을 조사하였다. 일반 밭토양에서 배추의 최고수량은 굴패화석 비료 약 $9Mg\;ha^{-1}$ 처리 시 획득이 가능하였으며, 약 $4Mg\;ha^{-1}$ 처리 시 소석회의 추천시비량 $2Mg\;ha^{-1}$에서와 동일한 수준의 수량을 얻을 수 있었다. 굴패화석 비료는 토양의 pH 교정, 칼숨 및 붕소 공급효과가 비교적 양호하였으며, 밭 토양에서 배추의 최고수량은 굴패화석 비료 약 $9Mg\;ha^{-1}$ 처리 시 획득이 가능하였으며, 굴패화석 비료 약 $4Mg\;ha^{-1}$ 처리 시 소석회 추천량 $2Mg\;ha^{-1}$ 처리 때와 동일한 수준의 토양 pH 교정과 Ca 공급 효과가 있었다. 그러나 굴패화석 비료의 과량시용은 토양 내 치환성 Ca 농도증가에 의한 배추의 생육저해 및 수량 감소, 그리고 토양의 물리성 악화 원인이 된 것으로 평가되었다. 그러므로 굴패화석 비료의 활용도를 증진 시키기 위해서는 이 부분에 대한 문제해결을 위한 대처방안 수립이 필요할 것으로 사료된다. 그리고 굴패화석 비료는 비교적 많은 양의 붕소를 포함하고 있어 배추에 대한 붕소시용 대체효과 및 미량원소의 이용률을 증진 효과가 있었다. 따라서 굴패화석 비료는 토양 pH 교정 및 미량원소 공급을 할 수 있는 토양개량제로서의 활용도가 높은 것으로 평가되었다.