• 한국초지조사료학회지
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• 제40권4호
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• pp.274-278
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• 2020

Pig slurry (PS) is the most applicable recycling option as an alternative organic fertilizer. The application of pig slurry has the risk of air pollution via atmospheric ammonia (NH3) and nitrous oxide (N2O) emission. The zeolite has a porous structure that can accommodate a wide variety of cations, thus utilizing for the potential additive of deodorization and gas adsorption. This study aimed to investigate the possible roles of zeolite in mitigating NH3 and N2O emission from the pig slurry applied to the maize cropping. The experiment was composed of three treatments: 1) non-N fertilized control, 2) pig slurry (PS) and 3) pig slurry mixed with natural zeolite (PZ). Both of NH3 and N2O emission from applied pig slurry highly increased by more than 3-fold compared to non-N fertilized control. The NH3 emission from the pig slurry was dominant during early 14 days after application and 20.1% of reduction by zeolite application was estimated in this period. Total NH3 emission through whole period of measurement was 0.31, 1.33, and 1.14 kg ha-1. Nitrous oxide emission in the plot applied with pig slurry was also reduced by zeolite treatment by 16.3%. Significant increases in forage and ear yield, as well as nutrient values were obtained by pig slurry application, while no significant effects of zeolite were observed. These results indicate that the application of zeolite and pig slurry efficiently reduces the emission of ammonia and nitrous oxide without negative effects on maize crop production.

• 한국산학기술학회논문지
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• 제17권10호
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• pp.39-45
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• 2016

본 연구는 친환경 농업부문 직불금의 지원이 농업부문 거시경제 지표에 어떠한 영향을 미쳤는지를 검토하기 위해 시행되었다. 이를 위해 농업부문을 일반농업과 친환경농업 부분으로 구분한 AGE(applied general equilibrium)모형을 이용하였다. 분석은 먼저 직불금 지원의 경제적 영향을 측정하기 위해 직불금 지급 이전의 상황을 기준으로 직불금이 지급된 몇 가지 상황을 시나리오로 설정하여 분석하였다. 즉 기준전망(baseline)은 직불금 지급 이전 상황, 시나리오 1은 직불금이 실제 수준으로 지급된 상황, 시나리오 2는 실제 직불금 보다 5% 추가 지원한 상황, 시나리오 3는 실제 직불금 보다 10% 추가 지원한 상황, 시나리오 4는 실제 수준 보다 15% 추가 지원한 상황, 시나리오 5는 실제 수준 보다 20% 추가 지원한 상황으로 설정하였다. 기준전망 및 시나리오에 대한 시뮬레이션 분석결과, 친환경 농업부문에 직불금의 투입으로 친환경 농업부문에 대한 고정자본 형성, 생산량, 노동생산성이 증대되었고, 이에 따른 노동력 대체효과로 친환경 농업부문 취업자는 다소 감소한 것으로 나타났다. 또한 친환경 농산물 가격은 직불금 투입 전후 큰 차이를 보이지 않은 것으로 분석되었는데 이는 공급 및 수요에 대한 가격탄력성이 비탄력적이고, 분석기간 동안 소비자들의 소득에 큰 변화가 없었기 때문에 나타난 현상으로 파악된다. 그러나 보다 더 정교한 분석을 위해 친환경 직불금의 투입에 따른 고정자본의 형성과 노동력의 대체 수준, 친환경 농업 및 농산물 관련 통계 자료의 보완에 따른 모형의 개선 등에 대해 향후 추가적인 연구가 이루어질 필요가 있다.

• 식물병연구
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• 제27권3호
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• pp.120-127
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• 2021

식물 바이러스는 작물 수확량에 상당한 손실을 일으키고 작물 생산을 지속적으로 위협하여 세계 식량 안보에 심각한 위협이 된다. 그 중 tomato spotted wilt virus (TSWV)는 주로 원예작물을 감염시키는 가장 위협적인 식물 바이러스로 넓은 기주 범위를 가진다. Reverse-transcription quantitative real-time PCR (RT-qPCR)은 TSWV의 민감한 검출을 위해 널리 사용되고 있지만 표준화의 어려움으로 인해 유용성이 감소한다. 따라서 본 연구에서는 TSWV 검출을 위해 민감하고 정확한 reverse transcription droplet digital polymerase chain reaction (RT-ddPCR)을 확립하였다. TSWV 검출에 대한 RT-qPCR 및 RT-ddPCR의 민감도를 비교하였고, TSWV에 대한 RT-ddPCR의 특이성 분석은 고추에서 주로 발생하는 바이러스 및 음성 대조군에서 특이성을 확인한 결과 증폭되지 않았다. RT-ddPCR 및 RTqPCR에 의해 측정된 TSWV의 선형회귀곡선은 모두 높은 선형성을 나타냈지만, RT-ddPCR 분석이 10배 이상 더 민감하고 더 낮은 TSWV의 copy 수를 검출할 수 있었다. 종합적으로, 우리의 연구 결과는 RT-ddPCR이 TSWV 검출에 대해 높은 민감도와 특이성을 제공하고 낮은 농도의 현장 시료에서 TSWV 검출하는 데 적합하다는 것을 보여준다.

• 한국유기농업학회:학술대회논문집
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• 한국유기농학회 2009년도 상반기 학술대회
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• pp.185-197
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• 2009

Eco-friendly agricultural products(EFAPs) are on an increasing trend of supply, but not much enhancing the rate of consumption due to higher price premiums and safety concerns among core consumers. Recently, the overall domestic market is rapidly changing from supplier's into a consumer-oriented one with increasing preferences for well-known branded produce, large retailers, and e-commerce. To cope with marketing shifts and develop eco-friendly farming, marketing strategies should be properly prepared on the basis of consumption trends, purchase patterns, and the specific needs which is interlinked sectors of productions, distributions, and general process of consumption. The key factors for stimulating the demand for EFAPs are outlined as follows : classification of buyers(segmentation of markets), provision of more information and safety assurance, labeling of brands and reference prices, shopping convenience for consumers and more appropriate pricing. In order to motivate consumers to buy more EFAPs, the products' safety should be verified and they should be made to sell at specialty store such as Chorokmaul, It is necessary that government, producers, consumers, and distributors play their respective roles in developing feasible programs for marketing EFAPs. Consequently, the specialty store will greatly contribute to the development of domestic environmentally-friendly farming and to raising their standings and prospects as well.

• 한국유기농업학회지
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• 제13권4호
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• pp.339-355
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• 2005

Nutrient balance is important to develop environmentally friendly agriculture. Phosphorus surplus in nutrient balance was more serious than that of nitrogen. Nitrogen and phosphorus exceeded twice the requirement at 30 cities/counties and 32 among 165, respectively. Given livestock waste and optimal nutrient balance, the proper number of animal feeding was 1.68LU/ha. Considering livestock waste only, the optimal number of livestock feeding was 3,918,000LU (heads) and, including fertilizer that would be 2,288,000LU. It is recommended to introduce the regional control system to regulate nutrient input and output, and the trading system of livestock feeding rights to control that.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 추계학술대회
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• pp.206-206
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• 2017

• 한국작물학회:학술대회논문집
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• 한국작물학회 2005년도 국제학술회의
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• pp.114-115
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• 2005

• The Plant Pathology Journal
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• 제39권1호
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• pp.158-158
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• 2023

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.137-137
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• 2017

Rice has important role as a primary food resource in especially the Asia, Korea, China, India, Indonesia and Japan. After development and increasingly using artificial chemical fertilizer, rice is getting high quality and quantity to satisfy ever-increasing people. On the other hand, the earth environment is more polluted each day. Nowadays consumers are looking for the organic crops or foods that were grown with eco-friendly method and in pure farmland. With the immergence of this trend, it is time to development environmentally-friendly agriculture. One of the methods is growing green manure crops in winter or spring on the fields. For this reasons, growing rye and Italian ryegrass are useful to use green manure to enhance rice production without chemical fertilizers and make the property of the soil eco-friendly. To know how improve the quality and quantity of rice with green manures, rye and Italian ryegrass, first the characteristics of green manure corps were measured. Dry matter yields of the rye and Italian ryegrass were 2.21 and $1.81t\;Ha^{-1}$. And the percentages of the dry matter were 28 and 32%. And, analyzed mineral components in rye and Italian ryegrass were nitrogen, organic matter, $P_2O_5$, CaO, $C_2O$ and MgO. Specially, the percentages of the organic matter and the CaO between rye and Italian ryegrass have difference appreciably. the height of the rice on the Italian ryegrass-fertilized field was the highest among the variant fields. The height of the rice on the non-fertilized field was the lowest. Yield of the Italian ryegrass-, rye- and non-fertilized rice are 805.2, 639.9 and $415.3kg\;10a^{-1}$. At the result, Italian ryegrass is the most effective green manure among the 3 treated-fertilized.

• 한국환경농학회지
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• 제42권4호
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• pp.396-407
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• 2023

The golden apple snail (Pomacea canaliculata) has been utilized as a natural and eco-friendly control of weeds in rice paddy fields. However, P. canaliculata can damage other crops. In this study, the effectiveness of plant extracts from various natural sources that are reportedly effective against pests in the control of P. canaliculata was investigated. The four plant extracts were effective against P. canaliculata and ranked in descending order as green tea seed (Camellia sinensis) > root of red spider lily (Lycoris radiata) > leaves of tobacco (Nicotiana tabacum) > root of sophora (Sophora flavescens). The mortality rate of P. canaliculata was increased using 200 to 2000 mg/kg of green tea seed powder. However, shrubby sophora root extract did not significantly increase the mortality rate. The LC₅₀ and LC₉₀ of green tea seed, tobacco leaves, shrubby sophora root, and red spider lily root were 900 and 2800 mg/L, 956 and 2320 mg/L, 2162 and 5325 mg/L, and 512 and 1054 mg/kg, respectively. The LC₅₀ and LC₉₀ of ground powder of C. sinensis, N. tabacum, S. flavescens and L. radiata were 248 and 646 mg/L, 403 and 733 mg/L, 409 and 905 mg/L, and 493 and 1141 mg/L, respectively. The findings indicate the remarkable control potency of green tea seeds against the golden apple snail. An organic material incorporating the four plant powders may help control green apple snail in an ecosystem-friendly manner.