• 농업과학연구
• /
• 제41권4호
• /
• pp.361-367
• /
• 2014

Host plants of the Henosepilachna vigintioctomaculata are known as Solanaceae plants such as potato, tomato, eggplant and Lycium chinense. Henosepilachna vigintioctomaculata (Motschulsky) cause continuous damage from early June to mid-August in leaves of L. chinense under environmental-friendly management in Cheongyang, Chungnam. The developmental period of egg and larva of H. vigintioctomaculata were investigated. H. vigintioctomaculata were reared on L. chinense at several temperatures, for example, 15, 20, 25 and $30^{\circ}C$ in the laboratory. In addition, the control effect of 5 eco-friendly agricultural materials were examined. As results, hatching rate is the highest to 91% at $25^{\circ}C$. Egg periods were 10.8, 7.7, 5.1 and 3.7 days at each tested temperature, respectively. And the total developmental periods from egg to adult were 42.7, 26.3, 18.4 and 19.4 days at each tested temperature, respectively. Otherwise, their eclosion rates from pupa to adult were showed 58%, 77%, 85%, 65% at each tested temperature, respectively. As a result of the control effect, both adults and larvae of H. vigintioctomaculata were shown a high mortality to mixture with extract of Sophora flavescens, Chenopodium ambrosioides and Melia azedarach. Additional, larvae is shown high mortality to extract of Azadirachta indica and Cymbopogon nardus. Thus H. vigintioctomaculata might be controled by using plant extract of eco-friendly agricultural materials in due season.

• 전기학회논문지
• /
• 제64권5호
• /
• pp.689-693
• /
• 2015

Recently, many advanced countries are devoted to the development of eco-friendly new-renewable energy to prepare for the depletion of resources. Korea belongs to the absolute lack of energy to import from abroad 97% of energy use. So, development and supply of eco-friendly energy such as small hydro power has been required even more. Our country has a large number of small-sized reservoirs and dams. So, hydro generator has been installed at the small reservoirs and dams with the economy. Since the discharge flow of agricultural reservoir is not constant, the guide vane of wicket gate is used for adjusting the output of the generator.

• 유기물자원화
• /
• 제31권3호
• /
• pp.73-82
• /
• 2023

본 연구는 느타리버섯 수확후배지를 이용하여 바이오차를 제조하고 바이오차 시용이 토양 이화학성과 작물생육에 미치는 영향을 구명하기 위하여 수행되었다. 연구에 사용한 바이오차는 TLUD 연소생산시스템 사용하여 450~600℃에서 제조하고 바이오차의 성분을 조사하였다. 사용한 바이오차는 원소분석결과 C 76.2%, H 2.5%, N 3.2%로 H/C 비율이 0.39로 국제적인 바이오차의 분해 안전성 인증기준(IBI)인 0.7 이하로 나타났으며 pH는 10.1, P₂O₅ 1.0%, K₂O 1.8%, CaO 2.5%로 나타났다. 느타리버섯 수확후배지 바이오차를 시용량별로 처리하여 배추, 대파 포장시험 결과 바이오차를 시용하지않은 시험구와 비교하여 바이오차 시용으로 토양의 유기물(OM), 전질소(T-N), 전탄소(T-C), K 함량이 증가하고 치환성양이온교환용량(CEC)이 증가하였다. 또한 토양 물리성에 대한 영향을 조사한 결과 바이오차 시용으로 토양의 용적밀도가 낮아지고 공극률이 높아져 토양 물리성이 개선되는 효과가 나타났다. 바이오차 200 kg/10a 시용시 배추와 대파 생육이 양호하고 최대수량을 나타내었으나 통계적인 차이는 없었다. 바이오차 시용량이 증가할수록 토양 탄소함량이 증가하고 이에 따라 토양 탄소격리량도 증가하였다. 느타리버섯 수확후배지 바이오차를 토양개량제로 활용하면 토양의 이화학성 개선에 효과가 있어 친환경 농가에서 토양개량제로 활용도가 높을것으로 생각되며 농업 부산물의 유기자원화를 통한 버섯 수확후배지의 소비처 확대에도 기여할 것으로 기대된다.

• 한국버섯학회지
• /
• 제19권2호
• /
• pp.96-102
• /
• 2021

표고 톱밥재배용 다수성 품종 육성을 위해 수집균주 중 우량계통의 단포자 교배로 육성한 '다담'의 주요 특성은 다음과 같다. '다담'의 균사생장 적온은 19~22℃, 발이 및 생육온도는 13~20℃, 발생형은 산발형으로 대조품종 '화담'과 유사하였고, 형태는 평편형으로 평반구형인 '화담' 차이가 있었다. 또한, 자실체 갓색은 '화담' 보다 진하고, 갓두께는 얇고, 대길이는 긴 특성을 가졌다. '다담'의 총 재배기간은 135~139일로 '화담'의 138~142과 크게 차이 나지 않았다. '다담'의 3주기까지 수량은 621 g으로 '화담' 371 g 보다 67% 많았다. 주기별 수량 양상을 보면, '다담'과 '화담' 모두 3주기 수량의 80~83%를 2주기 동안 수확할 수 있었다. 특히, '다담'은 1주기 수량비중이 60%로 '화담' 52%보다 1주기에 수량이 집중되는 특성을 보였다. 농가실증시험 결과, '다담'은 농가재배 품종인 'L808' 보다 다소 갓크기는 작고 대길이가 길었고 재배기간과 수량은 큰 차이 없었다. '다담'의 발생한 자실체 개체는 1개 배지에 평균 15개로 'L808'의 47개에 비해 약 3배정도 적어 솎기에 투입되는 노동력을 절감하는 효과가 기대된다.

• International journal of advanced smart convergence
• /
• 제10권2호
• /
• pp.151-157
• /
• 2021

Livestock farmers are using animal carcasses to dispose of the carcasses of livestock that have died of natural causes or disease. Most of the existing livestock carcass processors are mechanical in their structure without considering the environment. It has a function of sterilizing dead bodies at high pressure after processing them and causes environmental problems such as carbon monoxide emissions. If livestock carcasses occur, livestock farmers have to purchase their own livestock carcasses or entrust them to the outside world, which is costly. For this reason, the possibility of environmental pollution, infectious diseases, and spread has been increased recently by frequent dumping of dead bodies. The carcass of livestock mixed with manure not only serves as a medium for infectious diseases but also needsto be buried on a large scale as foot-and-mouth disease and avian influenza spread. As a result, the possibility of environmental pollution, such as contamination of groundwater, is increasing, so research is needed to protect and improve the environment. We aim to improve the process of processing livestock carcasses and purify the agricultural environment through development results on the form, structure and function of eco-friendly livestock carcasses. Its shape is applied with naturalshapessuch asstones and seeds. The material used in the dead body processis a brown beggar biocouple and is applied with an eco-friendly industrial animal recycling process. As a result of the study, it is expected to improve odors and the environment, and to be used as data to improve and help the livestock industry in the future.

• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2004년도 학술발표논문집
• /
• pp.53-53
• /
• 2004

• 한국농공학회논문집
• /
• 제48권2호
• /
• pp.59-66
• /
• 2006

This study is performed to evaluate freezing and thawing properties of polypropylene fiber reinforced eco-concrete using soil, natural coarse aggregate, soil compound and polypropylene fiber. The mass loss ratio is decreased with increasing the content of natural coarse aggregate and soil compound, but it is increased with increasing the content of polypropylene fiber. The ultrasonic pulse velocity, dynamic modulus of elasticity and durability factor are increased with increasing the content of natural coarse aggregate and soil compound, but it is decreased with increasing the content of polypropylene fiber. The mass loss ratio, ultrasonic pulse velocity, dynamic modulus of elasticity and durability factor are $1.49{\sim}3.32%,\;1,870{\sim}2,465\;m/s,\;77X10^2{\sim}225X10^2\;MPa\;and\;84.6{\sim}92.8$ after freezing and thawing 300 cycles, respectively. These eco-concrete can be used for environment-friendly side walk and farm road.

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

• 아시안잔디학회지
• /
• 제12권1호
• /
• pp.49-78
• /
• 1998

Nowadays, there are increasing demands of golf courses and it is necessary to make more golf courses than the present. To do this, we need to improve the environmental problems with the regional inhabitants, and it is said that the first thing to be considered in developing any golf course in Korea is to preserve the environment. In this context, the purpose of this study is to set forth several design factors to lessen the negative impacts which are accompanied with the development of golf courses. 1. The present conditions of golf courses in Korea Many new golf courses have come into being, particularly since the late 1980s, and now, in the year of 1997, over one hundred of golf courses are doing their business, yet the number of golf course is still less than required. So far, over a half of them have been made in the vicinity of Seoul on account of various reasons, and this has adversely affected on our natural environment. This unreasonable development of golf courses has caused serious water pollution, landslides and the other problems. Also, the topography of Korea is not good for golf courses. Although the demands of golf courses are increasing, the suitable sites for them are very limited, and therefore it is sometimes unavoidable to make golf courses on steep hills. Consequently, in designing golf courses in Korea, the most important thing is the balance between natural environment and artificial environment. 2.Eco-friendly golf course design factors 1) The concept of eco-friendly golf courses Ecologically sustainable and sound golf courses which are made by eco-friendly approaches 2)Basic conditions of eco-friendly golf courses (1)The most suitable sites (2) Conservation of existing ground as much as possible (3)Proper use of agricultural chemicals which have great impacts on the environment (4) Reasonable use of fertilizers (5) Developing a specialized fertilizer only for grass (6) Adaptation of organic agriculture (7) Improvement of grass sorts (8) Establishing reservoirs for purifying the water from golf courses 3) Eco-friendly golf courses (1) Location-Enough area /Gentle slope/Winding ground/Including lakes or streams /Not crossing wind's main direction Facing south or southeast /Suitable soIl for grass /Good drainage /Low level of underground water (2)Course layout and design -Consideration about existing contours as much as possible -Adaptation of Scotish design trend -Various holes' configuration -Consideration toward surrounding landscapes -Reducing grass areas -Giving buffer zones -Adapting computer methods in the process of site analysis and design (3) Eco-friendly considerations in constructing and managing golf courses -Protection of wildlife -Reuse of existing forests and preservation of topsoil -Renovation of old-fashioned courses -Reducing grass areas -Purification of water -Standization of management -Strict regulations against chemicals -Recycling organic materials -Through separation of the water inside golf courses and out of bounds -Getting proper construction works done in a due time 4.Eco-friendly considerations from a viewpoint of cultural environment 1) Well-matched landscape design and events planning 2) Implement of identifications and awarding systerns 3)Acknowledgement of superintendents' qualitications in the maintenance of golf courses 4)Increasing public golf courses and keeping good relationships with the neighbors near golf courses Key words: Pro-environmental development, Golf course.

• 한국응용곤충학회지
• /
• 제49권3호
• /
• pp.227-232
• /
• 2010

국내에서 사용되고 있는 친환경유기농자재 7종에 대하여 꿀벌(Apis mellifera)과 무당벌레(Harmonia axyridis)에 대한 독성영향평가를 실시하였다. 친환경유기농자재로는 식물 추출물을 활용한 자재 3종(왕중왕에코$^{(R)}$, 보검에코$^{(R)}$, 베스탑에코$^{(R)}$)과 미생물을 활용한 자재 4종(월드스타에코$^{(R)}$, 굿모닝$^{(R)}$, 블루칩$^{(R)}$, 카멜레온$^{(R)}$)을 이용하였다. 꿀벌에 대한 영향을 평가한 결과 식물 추출물을 활용한 자재 3종에서는 $RT_{25}$값이 1일~3일로 분석되어 친환경유기농자재 살포 1~3일 경과 후 꿀벌 방사가 필요하였으나, 미생물을 활용한 자재 4종은 아무런 영향을 미치지 않았다. 무당벌레의 성충 및 유충에 대한 영향 평가에서는 식물 추출물을 활용한 자재와 미생물을 활용한 자재 7종 모두 아무런 영향을 미치지 않았다.