• Journal of Mushroom
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• v.16 no.4
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• pp.263-266
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• 2018

This study was investigated the growth characteristics of 'Nongjingo' cultivar(Lentinula edodes) according to relative humidity(RH). The color difference of the pileus showed the highest L(Lightness, L) value in RH65 and the a(Redness, a) value in RH95. b(Yellowness, b) values were similar in all treatments. The hardness of pileus is highest at RH95. As the relative humidity increased, the length of pileus and stipe tended to increase. The diameter and thickness of pileus were high at RH95%. The diameter of stipe could not see the big difference in the three treatment groups. This study growth characteristics and yield were increased at higher relative humidity, but quality was decreased. Therefore, must adjust the relative humidity to produce high quality mushrooms.

• Journal of Environmental Science International
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• v.28 no.4
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• pp.435-439
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• 2019

This study was carried out to investigate the changes in the amount of 20 free amino acids in PDB (Potato Dextrose Broth) medium during the incubation period while cultivating Lentinula edodes. The total incubation period was 90 days, and the total amount of free amino acids was confirmed every 45 days. Among the 18 kinds of amino acids whose increase and decrease patterns were confirmed, 10 amino acids were increased compared to that in the control, among which cysteine increased from its initial value of $9,889{\pm}3{\mu}g/L$ to $12,909{\pm}2{\mu}g/L$ at 45 days and $29,256{\pm}4{\mu}g/L$ at 90 days. Six amino acids with decreased expression patterns were identified. Arginine decreased to $83,751{\pm}2{\mu}g/L$ after 45 days from its initial value of $161,787{\pm}1{\mu}g/L$ and to $79,055{\pm}7{\mu}g/L$ at 90 days.

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.4
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• pp.664-670
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• 2012

Experiments were conducted to find out the landscape effects and green manure production at the same time in farmland. Cornflower was grown in different soil texture with sand, sandy loam, loam, clay loam, and was sowing with autumn and spring respectively. The overwintering rate of cornflower was at 58.7% in average, and the treatment at sand soil showed 62.1% that was highest among other soils, which cornflower is possible to winter landscape crop. After flowering of cornflower, the contents of total nitrogen (T-N) and total carbon (T-C) in plant were 15.0 and $409.2g\;kg^{-1}$, respectively, and the carbon-nitrogen ratio (C/N) was 28.6. The yield of cornflower biomass, which will be returned to soil as green manure, recorded $1,210{\sim}3,920kg\;ha^{-1}$ at the spring seeding higher than the autumn seeding as $1,540{\sim}3,170kg\;ha^{-1}$, and the biomass treated by soil texture were showed that the treatments at the clay loam had been the largest yields both spring and autumn seeding among at other treatment of soil. The heights of cornflower regardless of soil treatments were 52.8 to 73.6 cm at the autumn seeding and 35.5 to 79.2 cm at the spring seeding although it was more significant variation at the soil textures than the seeding periods. The flowering periods of cornflower ranged from $17^{th}$ to $20^{th}$ in May at the autumn seeding and from $19^{th}$ to $20^{th}$ in June at the spring seeding, which was faster 30 days approximately at the autumn seeding than the spring seeding. In a view of the cornflower application as green manure after flowering, the autumn seeding, when considered to combine with following crops, was more suitable and various than the spring seeding, even though the yield at spring seeding was higher than one at autumn seeding.

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.5
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• pp.744-748
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• 2012

This study was carried out to investigate the incorporation effect of green manure crops (GMC) such as the hairy vetch on improvement of soil environment in reclaimed land during sorghum${\times}$sudangrass hybrid (SSH) cultivation over the past three years from 2009 to 2011. Plots consisted of conventional fertilization (CF) and incorporation of GMC were divided by rates of additional nitrogen fertilizer ($100kg\;ha^{-1}$) and decreased percentage of 30 50 70 100 fertilization in addition to non nitrogen fertilization (NNF). Soil physico-chemical properties, growth and yield potential were examined. The results were as follows. The testing soil was showed strong alkaline saline soil with low organic matter contents and less available phosphate while exchangeable sodium and magnesium were higher. Soil salinity was increased during cultivation of summer crop. However, SSH was not affected by salt content. The fresh weight of GMC at incorporation time was $18,345kg\;ha^{-1}$. Content of total nitrogen at incorporation time was 3.09% and the C/N ratio was 12.8. Fresh and dry matter yield of SSH were higher in the order of 30%, CF, N50%, N70%d, N100%, and NNF. Fresh and dry matter yield of SSH increased in the order of CF ($55,050kg\;ha^{-1}$, $16,250kg\;ha^{-1}$), N contents from 30% to 9%. Soil physical properties, such as bulk density were decrease with incoporation of GMC, while porosity was increased. Soil chemical properties, such as pH was decreased while content of exchangeable calcium, available phosphate, and organic matter were increased. Also contents of exchangeable sodium and potassium were decreased with incorporation of GMC than those before experiment. Thus, we assumed that incorporation of hairy vetch was more effective that can lead to reduce chemical nitrogen fertilizer and to improve soil environment in cultivating SSH on Saemangeum reclaimed land.

• Proceedings of the Korean Society of Crop Science Conference
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• 2000.04a
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• pp.150-151
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• 2000

• Proceedings of the Korean Society of Crop Science Conference
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• 2006.04a
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• pp.334-335
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• 2006

• THE HEALTH and ORGANIC FARMING
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• no.235
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• pp.1-12
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• 2007

친환경유기농업 연수교육 신청 쇄도/안동시지회 제21차 정기총회 및 안동시협의회 설립 총회 개최/우리의 산야초/과수 양분의 저장과 집적부위 및 저장시기의 이해가 중요 2-2/제56차 이사회 개최/중국 유기농식품 원료 안전성 관리 강화해야/미,유기농전문매장서 한국산 알로에 주스 판매/경북도,돈 되는 농업위해 5000억원 투입 발표/의류시장서도 유기농 바람/"친환경유기농업 육성정책"의 성공조건/전남도,학교급식 식재료 100% 친환경 농산물 공급/마늘 녹병/미생물을 이용한 토양병해방제/매일 변을 보지 않으면 변비다/옥천'친환경농업'메카/'06유기농인상 유통인상 수상/복제동물육류 '유기농식품'으로 볼수 있나/벼 멀칭재배의 이론과 기술/1월중 새식구 명단/농촌진흥청, 녹비작물 활용 유기농업 재배기술 개발/군위군,품목별 위탁교육 실시/우리고장에서는/GAP(우수농산물관리제도)농가호응높아/올해농업GDP2.7%감소예상/순천시,친환경농업 실천 결의대회 개최/UR 10년에 WTO 10년도 허송세월 하였으니 FTA 후 10년은 어떻게 살아남아야 할까/유기질비료의 이해

• 한국약용작물학회:학술대회논문집
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• 2010.10a
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• pp.503-504
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• 2010

• Korean Journal of Organic Agriculture
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• v.8 no.2
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• pp.97-110
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• 2000

An organic agriculture should be managed by mixed farming in farm unit as a closed recycling system. Due to restricted purchased of fertilizers from outside, organic farmer has to deal with limited amount of nutrient source in farm unit. Especially the supply of the essential nutrient, nitrogen, mostly depends on legumes fixing nitrogen optimizing the site-adapted crop rotation. Dynamics of humus and metabolic plant carbon and active soil carbon compartment in active and passive humuspool by rotation system was explained, and dynamics of potentially mineralizable nitrogen in organic nitrogen and biomass was discussed. It was also discussed comparison of ammonia emission, potential greenhouse effect, primary energy input, acidification potential, CO2 emission between organic and conventional farming, the nitrate-nitrogen dynamic in the soil profile by organic, integrated and conventional farming system. In conclusion, it was suggested for Korean Organic Agriculture that the importance of legumes and green manures in rotation system for increase/maintenance of soil ferfility, and was pointed out the need of investment for environment impact of Korean organic farming implement.

• 한국약용작물학회:학술대회논문집
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• 2009.05a
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• pp.143-144
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• 2009