• Korean Journal of Weed Science
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• v.15 no.1
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• pp.39-45
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• 1995

This experiment was carried out at Yeongnam Crop Experiment Station since 1992 to obtain basic information on ecology of weeds and weedy rice in direct-seeded rice fields. Annual grass weeds of Echinochloa sp., Leptochloa sp., Digitaria sp. and Setaria sp.(C4 plant) and weedy rice(C3 plant) were important species in direct seeded rice compared to transplanted rice field. Period of seedling emergence of barnyard grass was varied from 8 days to 20 days depending on seeding date while it was shorter 4 to 6 days than rice. Weed occurrence and the degree of yield loss were varied by cultivation method. In direct seeding method weeds increased 2 to 3 times compared to manual transplanting. The greatest yield loss was recorded in direct seeding(40 to 100%) followed by mechanical transplanting(25 to 35%) and hand transplanting(10 to 20%), in order. Double cropping of rice-barley was reduced weeds about 30% than rice single crop due to alleopathic effect of barley residue or stubble. Weedy rice(red rice) occurrence was closely related with seeding date and tillage methods. Early seeding and reduced tillage enhanced the growth of weedy rice.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1993.05a
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• pp.18-19
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• 1993

지상의 기상환경조절이 불가능한 노지재배는 생산의 불안정요인이 대부분 기후조건으로 부터 기인된다. 반면에 시설원예는 피복재를 이용하여 격리된 공간을 만들고 그 속에 태양에너지를 저장하고 이를 제어하여 작물의 생육에 적절한 온실환경을 조성하는 수단이며 밀폐된 공간은 외부와 격리되어 있기 때문에 열 및 물질의 전달이 억제되므로 필요한 경우에는 열, $CO_2$, 습도 및 공기의 이동 등 보조에너지의 투입이 가능하므로 보다 적절한 지상환경조건을 조성할 수 있다. (중략)

• Journal of Life Science
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• v.2 no.4
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• pp.240-247
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• 1992

차의 풍미의 차이는 차잎 자체가 가자고 있는 화학성분 조성의 차이와 가공방법의 차이에 기인하고, 차잎의 화학성분은 차나무의 훔종, 토질, 기후, 재배기술과 시비 등에도 영향을 받는다. 차의 특유한 맛의 주성분은 주로 카테킨과 아미노산류이다. 단맛과 감칠맛은 주로 아미노산 때문이지만 당류도 어느 정도 기여한다. 카테킨류에 의한 최근의 연구결과를 보면 노화를 방지하는 1)항산화 작용 2) 항종양, 발암 억제작용 3) 콜레스테롤 량의 조정 4)고혈압과 혈당 강하작용 5)항균작용과 해독작용이 있다.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1997.05a
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• pp.92-97
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• 1997

멀칭이란 토양표면을 여러 가지 재료로 피복하는 것을 말하며, 이용성으로는 생육촉진, 한해경감, 동해경감, 잡초억제, 토양보호, 과실의 품질향상 등이 있고, 멀칭 재료도 투명필름, 흑색필름, 볏집, 알미늄반사필름 등이 있다. 또한, 광량이 부족한 겨울철 시설재배에서는 시설내 입사광을 될 수 있는 대로 많이 할 필요가 있다. (중략)

• Proceedings of the Korean Society of Crop Science Conference
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• 1999.05a
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• pp.75-77
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• 1999

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1999.11a
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• pp.209-212
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• 1999

여름철 재배시설의 기본적인 온도상승 억제방법은 차광과 환기이지만 이 방법만으로는 작물의 적정 생육온도에 접근하기 어렵기 때문에 추가적인 냉방 장치가 도입되고 있다. 현재 온실의 냉방시스템은 물의 증발잠열을 이용한 Pad and Fan 방식과 Fog 방식의 냉방시스템이 보급되어 있으나, 국내의 지역기상조건을 감안한 연구가 충분히 이루어지지 못하여 냉방시스템의 설치와 운영에 대한 기준이 명확하지 못한 실정이다. 따라서, 본 연구에서는 현장 실험을 통하여 기초적인 자료를 수집하였다.

• 한국약용작물학회:학술대회논문집
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• 2012.05a
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• pp.187-188
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• 2012

• 한국약용작물학회:학술대회논문집
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• 2009.05a
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• pp.159-160
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• 2009

• Korean journal of applied entomology
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• v.52 no.3
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• pp.215-225
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• 2013

To assess the efficacy of nematicides for the control of plant-parasitic nematodes in fruit and vegetables fields, soil samples were collected from a cucumber field at Gongju; from strawberry fields at Buyeo, Nonsan, and Jinju; and from a melon field at Gocksung in Jeonnam Province, Korea. Plant-parasitic nematodes were separated from each soil sample and identified. The susceptibilities of the nematodes to abamectin 1.68% SC, cadusafos 3% GR, dazomet 98% GR, fosthiazate 30% SL and BA12011 SL were examined under laboratory and field conditions. The average population density of plant-parasitic nematodes was generally reduced after the treatment with nematicides; however, there was increase in the population of Pratylenchus spp. in soil after treatment with fosthiazate at Buyeo and Gocksung. Furthermore, there were increased populations following treatment with abamectin, cadusafos, and dazomet at Gocksung. The control effects of BA12011 treatment on plant-parasitic nematodes were confirmed to be similar to those of the other 4 nematicides evaluated, although its control effect was higher than that of fosthiazate in cucumber-growing soil at Gongju. The effects of nematicide treatment on egg mass formation in each of the collected soils differed according to the region of soil origin. Abamectin was effective in reducing the degree of egg mass formation in Buyeo and Jinju soil, whereas BA12011 was effective in Nonsan and Gocksung soil. Dazomet was found to inhibit egg mass formation in Gongju soil. To evaluate the effect of the newly developed nematicide, BA12011, experiments were conducted in a cucumber-growing greenhouse. The average population densities of Meloidogyne spp., Pratylenchus spp., and Helicotylenchus spp. after the first treatment were reduced to a greater extent than after the second treatment. It is thus suggested that early nematicide treatment is important for effective control of plant-parasitic nematodes.

• Korean Journal of Environmental Agriculture
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• v.37 no.4
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• pp.235-242
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• 2018

BACKGROUND: About 81% of nitrous oxide ($N_2O$) emissions from agricultural land to the atmosphere is due to nitrogen (N) fertilizer application. Mitigation of $N_2O$ emissions can be more effective in controlling biochemical processes such as nitrification and denitrification in the soil rather than decreasing fertilizer application. The use of urease inhibitors is an effective way to improve N fertilizer efficiency and reduce $N_2O$ emissions. Several compounds act as urease inhibitors, but N-(n-butyl) thiophosphoric triamide (NBPT) has been used worldwide. METHODS AND RESULTS: Hot pepper and chinese cabbage were cultivated in five treatments: standard fertilizer of nitrogen-phosphorus-potassium(N-P-K, $N-P_2O_5-K_2O$: 22.5-11.2-14.9 kg/ha for hot pepper and $N-P_2O_5-K_2O$: 32.0-7.8-19.8 kg/ha for chinese cabbage), no fertilizer, and NBPT-treated fertilizer of 0.5, 1.0, and 2.0 times of nitrogen basal application rate of the standard fertilizer, respectively in Gyeonggi-do Hwaseong-si for 2 years(2015-2016). According to application of NBPT-treated fertilizer in hot pepper and chinese cabbage, $N_2O$ emission decreased by 19-20% compared to that of the standard fertilizer plot. CONCLUSION: NBPT-treated fertilizer proved that $N_2O$ emissions decreased statistically significant in the same growth conditions as the standard fertilization in the hot pepper and chinese cabbage cultivated fields. It means that NBPT-treated fertilizer can be applied for N fertilizer efficiency and $N_2O$ emissions reduction.