• 한국토양비료학회지
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• 제48권6호
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• pp.724-730
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• 2015

The aim of this study was to produce Aminotosan$^{(R)}$ fertilizer using optimized chitosan coagulant from waste livestock blood. Amino-acid fertilizer was produced by pretreated livestock blood. Chitosan coagulant was aggregated with amino-acid fertilizer to produce Aminotosan$^{(R)}$. Optimized coagulation conditions were set using chitosan coagulant such as 10% citric acid and 500 ppm chitosan coagulant by analysis of CST and TTF. The efficiency of coagulation by chitosan coagulant under the optimal conditions was better than chemical coagulants. After solid/liquid separation for coagulated amino-acid fertilizer, Aminotosan$^{(R)}$ fertilizer which added eco-friendly and aesthetic functions was produced.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.430-433
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• 2009

The development of large-scale environmental friendly livestock complex in the reclaimed tideland is one of different alternatives to increase the competitiveness of internal livestock industry against an international opening markets as DDA and FTA in agricultural field. Recently, it is possible to introduce an environmental friendly livestock complex in the reclaimed tideland by an amendment of the acts for agricultural land. However more studies that are on the basis of nitrogen and phosphorus mass balance need to preserve the agricultural environments as the quality of agricultural water and soil in rural area. In this study, the reference for feasibility study is Whaong reclaimed tideland which located at Whaseong city, Gyeonggi Province, and a basic concept of environmental friendly livestock complex is the production of forage crops with the supply of liquid fertilizer and the production of bioenergy such as biogas by the recycling of pig slurry as a resource. The mass balance of nitrogen based on between forage crops such as maize, barley and liquid fertilizer supplied at the reclaimed tideland, and also it was estimated an economical efficiency as anaerobic digestion plant for treating pig slurry of $100m^3/day$ introduce in an environmental friendly livestock complex.

• 한국축산시설환경학회지
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• 제19권2호
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• pp.183-190
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• 2013

Establishment of a new concept of environmental friendly livestock manure management is required based on the facts. But now liquid fertilizer quality in korea shows a large difference among regions and the regulations are uncertain. Focusing on precedent study on main level-grading factors of liquid fertilizer quality certification, the study collected laws and standards related to liquid fertilizer of livestock manure at home and abroad and produced evaluation standards. Liquid fertilizer was divided into four factors (fertilizing value, harmfulness, stability and uniformity). According to each item, scores were awarded based on 16 details: fertilizing value (Nitrogen concentration, the whole concentration of Nitrogen, Phosphoric acid and Kalium), harmfulness (heavy metals, pathogenic microorganism and antibiotics), stability (maturity degree and odour), uniformity (EC, BOD, SS, moisture content and salt). The grade of liquid fertilizer, A (42~48), B (34~41), C (26~33) were rated using total scores.

• 농촌지도와개발
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• 제16권4호
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• pp.687-711
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• 2009

Recently, environmental-friendly agriculture (EFA) has been pointed out as an alternative for the change of our agricultural conditions. But the excessive amount of nutrients have been used to farmland since 1960s, when the intensive farming method called "High-Input, High-Yield" was expanded in earnest. This study was conducted to examine and compare farmers' purchasing and using fertilizer. For these purpose, data were gathered from a total of 326 farmers of the nation wide (greenhouse horticulture 60, upland cultivating 177, fruit-growing 89). The findings were as follows: First, 70.6% of greenhouse horticulture farmers, 89% of upland-cultivating farmers, 76.3% of fruit-growing farmers purchased fertilizer in Nong-hyup (farmers' cooperative organization). Second, only 54.2% of the greenhouse horticulture farmers, 60.2% of the upland cultivating farmers and 70.4% of the fruit-growing farmers recognized the optimum level of fertilizer. So, governmental organizations and agricultural technology center should carry out various programs for informing the farmers of the right way to use fertilizer and to practice EFA.

• 한국유기농업학회지
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• 제5권1호
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• pp.45-66
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• 1996

In Korea there is still no basic standard for organic agriculture and organic farmers in Korea do not follow the minimum requirements of IFOAM basic standard Most of them just practice the organic agriculture applying organic fertilizer, commercial seed without legume, rotation and green manure. But they believe this system is a absolutely environmental friendly agricultural system and it produce a safe agricultural product since they are not aware of the basic standard of organic agriculture at all. The overuse of organic fertilizer by some organic farmer have caused some severe problems risk for nitrate and phosphate leaching. In soil profile showed the potential risk for nitrate and phosphate leaching. In the paper, it is discussed on the environmental friendly function and the safe vegetable production by european organic agriculture which keeps the internationally recognized basic standards of organic agriculture. Therefore it is strongly recommended that korean organic farmer have to follow the IFOAM it is strongly in order to practice the environmental agriculture and produce the safe food. And it is also necessary to introduce to Korea the basic standard of organic agriculture which coincides with IFOAM's and Codex of FAO/WHO immediately if they really want to practice an organic agriculture in the country.

• 한국토양비료학회지
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• 제44권2호
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• pp.308-315
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• 2011

Ammonium- and potassium-loaded zeolite (NK-Z) and other four kinds of environmental friendly fertilizers/agents were applied to characterize their effectiveness on garlic (Allium sativum L.) growth and soil amelioration. Selenium dioxide ($SeO_2$) and germanium dioxide ($GeO_2$) liquid treatments significantly increased selenium (Se) and germanium (Ge) contents in garlic stems, garlic cloves and clove peels. In soil treated with ZBFC, Se contents in garlic stems, cloves, and clove peels was 13.89-, 12.79-, and 10.96-fold higher, respectively, than in the controls. The inorganic contents of plants grown in soil treated with functional strengthened fertilizers were also higher than in plants grown in control soil. Soil treated with arbuscular mycorrhizal fungi (AMF) agents exhibited significantly greater spore density and root colonization rate than in untreated soil. The density of chitinolytic microorganisms in soil treated with colloidal chitin was also significantly higher than in untreated soil. The cation exchange capacities (CEC) in ZAFC-, ZBFC-, and ZBF-treated soils was 16.05%, 8.95%, and 8.80% higher than in control soil 28 weeks after sowing.

• 한국토양비료학회지
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• 제39권4호
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• pp.195-203
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• 2006

길항미생물 MP-1은 여러 종의 곰팡이와 효모 및 음식물을 부패시키는 세균 (그람양성 및 음성) 에 대하여 항균활성을 보였다. MP-1의 16S rRNA gene 염기서열은 기존에 밝혀진 Brukholderia sp.의 염기서열과 99-100% 유사하였다. 배양액으로부터의 항균물질은 에틸아세테이트 (EtOAc)를 사용하여 분리하였으며 EtOAc에 용해된 산성 분획은 silica gel, Sephadex LH-20, ODS 컬럼크로마토 그래피 및 HPLC를 사용하여서 정제를 실시 하였다. 최종적으로 Gas chromatographic-mass 스펙트럼을 통한 분석을 통하여 4 종의 항균 활성을 나타내는 물질은 phenylacetic acid, hydrocinnamic acid, 4-hydroxyphenylacetic acid 및 4-hydroxyphenylacetate methyl ester로 확인 되었다. 각각의 항균 활성물질들의 미생물에 대한 최소저해농도(MIC)는 $250{\sim}2500ug\;ml^{-1}$ 인 것으로 나타났다. 또한 6 mm paper disc 에서의 1mg (건물중) 산성 분획의 항균활성은 같은 비율로 혼합한 표준혼합용액 보다 더 효과적인 것으로 나타났다.

• 농업과학연구
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• 제49권4호
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• pp.657-666
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• 2022

Nitrogen (N) is a vital element in growing crops and is essential for improving the yield and quality of crops. Thus, N fertilizer is the most widely used fertilizer and the primary N input source in soil-crop systems. Inorganic fertilizers such as urea are known to improve crop productivity and increase soil fertility. However, application with excessive amounts can interfere with crop growth and accelerate soil acidification. For these reasons, the use of organic fertilizers, which mainly contain organic nitrogen, has gradually increased worldwide. Therefore, this study evaluated the effects of N fertilizer on the growth of Chinese cabbage including its functional compounds glucosinolates (GSLs). For the cultivation of Chinse cabbage, inorganic fertilizer was used for urea, and organic fertilizers were divided into conventional and biochar-based fertilizers. The growth parameters of Chinese cabbage treated by organic fertilizers was better than those of the inorganic fertilizers. Additionally, it was found that their co-application was more efficient. However, their GSL contents were lower with the application of the organic fertilizers. The characteristics of the experimental soil also changed according to the type, amounts and co-application of fertilizers. Therefore, this study presents the basis for an eco-friendly method that can increase the functionality and productivity of Chinese cabbage compared to conventional cultivations.

• 한국환경농학회지
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• 제42권4호
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• pp.418-426
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• 2023

This study focused on nitrous oxide, a major greenhouse gas produced in agricultural settings through bacterial nitrogen oxidation in aerobic soil. Nitrogen fertilizer in farmland is identified as a primary source of nitrous oxide. The importance of reducing excess nitrogen in soil to mitigate nitrous oxide production is well-known. The study investigated the use of liquefied pig manure as an alternative to urea fertilizer in conventional agriculture. Results showed a more than two-fold reduction in nitrous oxide emissions in pepper cultivation areas with liquefied pig manure compared to that with urea fertilizer. The population of Nitrosospira, a nitrous oxide-producing bacterium, decreased by over 10% with liquefied pig manure. Additionally, nirK and nosZ, which are related to the denitrification process, significantly increased in the urea fertilizer group, whereas levels in the liquefied pig manure group resembled those with no nitrogen treatment. In conclusion, the experiment confirmed that liquefied pig manure can serve as an eco-friendly nitrogen fertilizer, significantly reducing nitrous oxide production, a major contributor to the atmospheric greenhouse effect.

• 콘크리트학회논문집
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• 제25권1호
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• pp.115-123
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• 2013

철강산업은 다량의 원료와 다량의 에너지를 소비하는 대표적인 업종으로 생산 공정을 거치면서 철강생산과 더불어 부산물인 철강슬래그를 다량 발생시킨다. 또한, 근래 무분별한 해양개발 및 환경오염 등으로 광대한 해양생물의 서식기반이 소실되어 수산자원의 감소현상이 심화되고 있어 이에 대한 대책이 시급한 실정이다. 따라서 이 연구에서는 다량 부산되는 복합슬래그를 천연골재 대체재료로 재활용하는 방안 제시와 해양목장 조성용 소재로서의 친환경 다공질 콘크리트의 배합요인별 공학적 특성 및 적용성 검토연구를 수행하였다. 배합요인별 공극률 시험결과 모든 조건에서 오차범위 2.5%이내의 결과를 나타내었다. 압축강도 시험 결과 최적 혼입률은 복합슬래그골재 30%, 특수처리입상비료 10% 혼입시 가장 우수한 친환경 다공질 콘크리트 제조가 가능하였다. 해양 적용 콘크리트로서 해수저항성 역시 압축강도가 높은 배합조건이 가장 우수한 성능을 나타냈다. 친환경 다공질 콘크리트의 해양생물 서식기반 제공능력평가 결과, 공극률이 증가할수록 해양생물의 착상 및 서식이 용이하였으며, 특수처리입상비료 혼입시 초기 착상 및 서식활성화가 활발히 이루어짐을 확인하였다. 복합슬래그골재 및 특수처리입상비료의 혼입에 따른 해양생물에 대한 유해성 검토 결과 어류에 대한 안정성은 확보되는 것으로 확인하였다.