• 농약과학회지
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• 제18권4호
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• pp.417-421
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• 2014

난방제 해충인 파밤나방의 친환경적 방제를 위하여 토양에서 곤충병원성 곰팡이를 수집한 다음, 파밤나방 유충에 대해 우수한 방제효과가 있는 곰팡이 Metarhizium anisopliae FT83을 분리하여 파밤나방의 생육단계별 살충율을 검정하였다. M. anisopliae FT83의 파밤나방 1령~3령 유충에 대한 살충율은 $1{\times}10^8conidia/ml$ 수준에서 100%이었고 반수치사시간은 0.5일, 2.6일, 2.5일이었으며 4령과 5령에 대한 살충율은 각각 $83.3{\pm}6.2%$, $86.0{\pm}5.7%$였으며 반수치사시간은 4.2일, 3.6일이었다. 번데기와 알에 대한 살충율도 100%로 파밤나방의 전 생육단계에 대해 높은 살충활성을 나타내었다.

• Mycobiology
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• 제42권4호
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• pp.385-390
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• 2014

The beet armyworm Spodoptera exigua (Lepidoptera: Noctuidae) is difficult to control using chemical insecticides because of the development of insecticide resistance. Several pest control agents are used to control the beet armyworm. Entomopathogenic fungi are one of the candidates for eco-friendly pest control instead of chemical control agents. In this study, among various entomopathogenic fungal strains isolated from soil two isolates were selected as high virulence pathogens against larva of beet armyworm. Control efficacy of fungal conidia was influenced by conidia concentration, temperature, and relative humidity (RH). The isolates Metarhizium anisopliae FT83 showed 100% cumulative mortality against second instar larvae of S. exigua 3 days after treatment at $1{\times}10^7$ conidia/mL and Paecilomyces fumosoroseus FG340 caused 100% mortality 6 days after treatment at $1{\times}10^4$ conidia/mL. Both M. anisopliae FT83 and P. fumosoroseus FG340 effectively controlled the moth at $20{\sim}30^{\circ}C$. M. anisopliae FT83 was significantly affected mortality by RH: mortality was 86.7% at 85% RH and 13.4% at 45% RH. P. fumosoroseus FG340 showed high mortality as 90% at 45% RH and 100% at 75% RH 6 days after conidia treatments. These results suggest that P. fumosoroseus FG340 and M. anisopliae FT83 have high potential to develop as a biocontrol agent against the beet armyworm.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 춘계학술대회
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• pp.287-290
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• 2014

전국의 학교 급식 및 군 급식 등 대규모 농축수산물의 물류가 이루어지고 있으나, 안심 농축수산물에 대한 물류정보가 거짓표시 되어 안전한 식품공급에 사회적인 이슈가 되고 있다. 외국산 저 품질 축산물을 국내산 고품질 축산물로 둔갑시키고, 일반 농산물을 친환경 농산물로 속이고, 오염된 채소류를 신선한 채소류로 속여서 학교 및 집단급식소에 식자재로 납품하고 있다. 본 논문에서는 부정 농축수산물의 물류정보에 대한 보안 방법과 부정 농축수산물 피해로 인한 법적인 책임소재 증거자료로 e-Discovery시스템을 적용하여, 책임 소재와 피해 보상에 대한 연구가 필요하다.

• 한국환경농학회지
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• 제42권4호
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• pp.457-464
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• 2023

The rendering residue generated by rendering disposal, an eco-friendly livestock carcass disposal method, is a useful agricultural resource. Methods for recycling this are being actively researched, and this study investigated the impact of applying rendered residue directly to soil on crop productivity and the agricultural environment. The chemical properties of the rendering residue were examined. The pH, OM, T-N, T-P, CaO, K₂O, and MgO content values were 5.47%, 59.8%, 9.22%, 2.96%, 2.16%, 0.51% and 0.10%, respectively. Treatment conditions were divided into control, inorganic fertilizer, and rendering residue, and rendering residue corresponding to 50, 100, and 200% nitrogen content was applied based on the amount of inorganic fertilizer nitrogen input. Greenhouse gases and ammonia were collected during the cultivation period. Rendering residue increased both the yield and growth of peppers and was effective in improving nutrients such as pH and OM of the soil after harvest. However, compared to inorganic fertilizer treatment, it increased emissions of nitrous oxide and methane as well as ammonia. It is judged that the direct agricultural use of rendering residue is difficult, and a utilization method is needed.

• Animal Bioscience
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• 제37권7호
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• pp.1196-1203
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• 2024

Objective: A study was conducted to quantify the performance differences of the near-infrared spectroscopy (NIRS) calibration models developed with different degrees of hay sample preparations. Methods: A total of 227 imported alfalfa (Medicago sativa L.) and another 360 imported timothy (Phleum pratense L.) hay samples were used to develop calibration models for nutrient value parameters such as moisture, neutral detergent fiber, acid detergent fiber, crude protein, and in vitro dry matter digestibility. Spectral data of hay samples prepared by milling into 1-mm particle size or unground were separately regressed against the wet chemistry results of the abovementioned parameters. Results: The performance of the developed NIRS calibration models was evaluated based on R², standard error, and ratio percentage deviation (RPD). The models developed with ground hay were more robust and accurate than those with unground hay based on calibration model performance indexes such as R² (coefficient of determination), standard error, and RPD. Although the R² of calibration models was mainly greater than 0.90 across the feed value indexes, the R² of cross-validations was much lower. The R² of cross-validation varies depending on feed value indexes, which ranged from 0.61 to 0.81 in alfalfa, and from 0.62 to 0.95 in timothy. Estimation of feed values in imported hay can be achievable by the calibrated NIRS. However, the NIRS calibration models must be improved by including a broader range of imported hay samples in the modeling. Conclusion: Although the analysis accuracy of NIRS was substantially higher when calibration models were developed with ground samples, less sample preparation will be more advantageous for achieving rapid delivery of hay sample analysis results. Therefore, further research warrants investigating the level of sample preparations compromising analysis accuracy by NIRS.

• 농업과학연구
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• 제46권1호
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• pp.93-102
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• 2019

The materials of artificial soils in the production process of container seedlings have a great influence on plant growth. Peat moss, vermiculite, and perlite have been used as major components of artificial soils for many years; however, they could decrease carbon fixation carried out by the soil and cause environmental problems such as a change in the water quality. Thus, environmental friendly materials to replace them must be developed. The purpose of this study was to verify the optimum additive materials of artificial soils and their mixed ratios for the growth and seedling quality index (SQI) of Quercus serrata. Rice husk, mushroom sawdust, and pine bark were each used as an additive material and mixed into the growth medium at 10% and 20% of the total volume. There was no significant difference in the height growth of Q. serrata. The 20% mushroom sawdust decreased the root collar diameter by 23.4% compared to the control. The total dry weight was highest with the 10% rice husk and was significantly lower by 10.3% for the 20% mushroom sawdust compared to the control. Additionally, the SQI for all the treatments showed no tendency to increase compared with the control. Thus, this study showed the possibility of recycling biomaterials from agriculture and forest for seedling production. This method could reduce environmental problems and help eco-friendly nurseries to achieve a carbon negative impact by the recycling of by-products.

• 농촌지도와개발
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• 제11권1호
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• pp.175-189
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• 2004

There are many assertions related to biotechnology and genetically modified organisms(GMOs). Some experts have asserted that GM foods could be dangerous and that there is no reliable evidence that have been demonstrated safe through appropriate tests, and the others asserted these foods are as safe and nutritions as their conventional counterparts. The objectives of this study was to study an societal implications of biotechnology and GMOs in agriculture. To keep the balance in mind the researcher examined not only usefulness but also harmfulness of GMOs, along with the developmental process of biotechnology industry. It was observed that basically, multinational corporations developed GMOs to maximize their profit, and strengthened their control on agriculture and food through GMOs, as observed in alliance among big multinational corporations' food chain cluster and systems. Under the situation, farmers were losing their status as independent producer and were becoming propertied labor for multinational corporation through contract farming. If these trends continuous in the future, multinational corporations will have the control of genetic resources, these may bring about reduction of bio-diversity, thus may lead the opposite direction to eco-friendly agriculture. If multinational corporations' tendency to suppress the latent harmfulness for the profit continuous further, this may lead the degradation phase of farming and agriculture, thus leading negative socio-economic effects as well as culture and religion.

• Mycobiology
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• 제44권4호
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• pp.338-342
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• 2016

The culture filtrate of Lentinula edodes shows potent antimicrobial activity against the plant pathogenic bacteria Ralstonia solanacearum. Bioassay-guided fractionation was conducted using Diaion HP-20 column chromatography, and the insoluble active compound was not adsorbed on the resin. Further fractionation by high-performance liquid chromatography (HPLC) suggested that the active compounds were organic acids. Nine organic acids were detected in the culture filtrate of L. edodes; oxalic acid was the major component and exhibited antibacterial activity against nine different phytopathogenic bacteria. Quantitative analysis by HPLC revealed that the content of oxalic acid was higher in the water extract from spent mushroom substrate than in liquid culture. This suggests that the water extract of spent L. edodes substrate is an eco-friendly control agent for plant diseases.

• 농촌계획
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• 제29권4호
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• pp.175-182
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• 2023

The purpose of this study, the trend of renewable energy, domestic and foreign renewable energy policies, and the flow of the legal system related to renewable energy location were identified, and a location analysis using public data was studied when solar energy was located. First, renewable energy is leading to energy conversion by reducing the proportion of existing fossil fuel-centered energy sources in the global trend and increasing the proportion of renewable energy, an eco-friendly energy source, and changing the institutional and market structure. Second, large-scale solar energy power plants are installed and operated in rural areas where there is no change in insolation and land prices are cheaper than in urban areas where there are many changes in insolation due to surrounding high-rise buildings and street trees. Third, if a preliminary location review is conducted using public data at this time, it will be easy to identify the optimal location for area and size calculation. Fourth, the solar energy location functional area was studied in area A, and the total area of the target area was 624.5km², with 392.7km² and 62.9% of the avoidance area where solar power cannot be located.

• 한국인터넷방송통신학회논문지
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• 제23권6호
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• pp.191-197
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• 2023

농민에게 영농 일지는 친환경 및 GAP(농산물우수관리) 인증을 받거나 여러 보조금 신청 시 증거자료로 활용할 수 있는 중요한 문서이다. 영농 일지는 항목별로 세세하게 작성할수록 좀 더 가치 있는 자료가 될 수 있다. 허나 일부 농민들은 서류 작성 및 글쓰기에 익숙하지 않기 때문에 영농 일지 작성법에 대한 교육이 이루어지고 있음에도 불구하고 어떻게 작성해야 할지 막막해하는 현실이다. 따라서 본 논문은 ChatGPT를 활용하여 기존 영농 일지에 추가해야 할 사항을 손쉽게 작성하는 방법을 제안한다. 본 논문이 제안하는 방법으로 영농 일지 내용을 자세하게 작성하면 훌륭한 인증 증거자료로서의 가치는 더욱 상승하고 다음 농사를 진행하는 데에 많은 도움을 줄 것으로 기대한다.