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설 상추에 대한 Rhodobacter sp. SA16 처리 효과
이영한 ( Young Han Lee ),정한택 ( Han Taek Jeong ),윤한대 ( Han Dae Yun ) 한국환경농학회 2008 한국환경농학회지 Vol.27 No.2
This experiment was conducted to determine the development of mixed organic fertilizer using photosynthetic bacteria and mass production of mixed microbial compound for the environment -friendly agriculture. Photosynthetic bacteria, Rhodobacter sp. SA16 was isolated from soil collected by plastic film house. The SA16 strain was identified based on 16S rDNA sequence analysis and it is closely related to Rhodobacter sp. (100% similarity). The mixed organic fertilizer using SA16 was made of N-P2O5-K2O=60-10-20 g kg-1 with combined soybean cake, sesame cake, powdered blood, fish meal, powdered bones and red-yellow soil. The mixed organic fertilizer 0.45, 0.90 and 1.35 Mg ha-1 application in Ihyeon series was treated based on soil testing for lettuce cultivation in plastic film house. These results showed that the yield was increased the 18 and 19% over control by the mixed organic fertilizer application 0.45 and 0.90 Mg ha-1, respectively. In the physical properties of the soil, the porosity of mixed organic fertilizer 1.35 Mg ha-1 treatment was highest at 58.8%. Our results clearly revealed that the organic fertilizer using Rhodobacter sp. SA16 and mass production of mixed strains could be a useful technology in pursuing environment-friendly agriculture.
이영한(Young Han Lee),김용국(Yong Guk Kim),김홍국(Hong Kook Kim),이미숙(Mi Suk Lee),김도영(Do Young Kim) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11
In this paper, we propose a super wideband extension algorithm for ITU-T G.729.1, which extends the bandwidth from 7.2 ㎑ to l4 ㎑ with a bit-rate increase of 4 kbit/s for the improved decoded quality of music signals. The proposed extension algorithm is based on th spectral band replication (SBR) technique employed in the 3GPP HE-AAC+ codec. In order to fulfill the ITU-T requirements for the super wideband extension of G.729.1, we modify the SBR technique so the proposed algorithm can work with a lower delay. It is shown from the listening tests on speech and music signals that a super wideband extension version of ITU-T G.729.l employing the proposed bandwidth extension algorithm provides better quality than G.722.lC operated at a bit-rate of 24 kbit/s, which is one of ITU-T requirements for the G.729.l super wideband extension.
경남지역 과수원 토양 화학성분이 미생물 생태에 미치는 영향
이영한(Young-Han Lee),장용선(Yong-Sun Zhang) 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.2
경남지역 과수원 토양 25개소를 대상으로 2010년에 토양 화학성분과 미생물 다양성을 검토하고 토성, 지형 및 작물별 주요 변동요인을 주성분분석으로 해석하였다. 토양 유효인산 및 치환성 칼륨 함량은 적정수준 보다 각각 2.6배 및 2.3배 높았으며 대부분 토양 화학성분의 최소값과 최대값 차이가 크게 나타났다. 지형적으로 산록경사지는 토양 유효인산 함량이 유의적으로 높았고 (p<0.05) 미사질양토에서 곰팡이와 형광성 슈도모나스균 개체수가 사양토 보다 유의적으로 높았다 (p<0.05). 주성분 분석결과 제 1주성분이 28.4%, 제 2주성분이 20.1%로서 전체 48.5%의 자료를 설명할 수 있었으며 제 1주성분은 토양의 세균개체수가 가장 크게 기여하였다. 토양 유기물 함량은 곰팡이 개체수와 정의상관을 보인 반면 세균 개체수와 부의상관을 나타냈다. Soil microbial diversity was responsible for a strong effect on the chemical properties of orchard soils. This study evaluated a relationship between soil chemical properties and soil microbial diversities at 25 sites in orchard soils in Gyeongnam Province. The average nutrients in the orchard soils were 2.6 times for available phosphorous, 2.3 times for exchangeable potassium and 1.3 times for exchangeable calcium higher compared to recommend concentrations in the orchard soils. Contents of available phosphorous and organic matter in the inclined piedmont soils were higher than those in the other topographical soils (p<0.05). Populations of fungi and fluorescence Pseudomonas sp. in the silt loam soils were significantly higher than those in the sandy loam soils (p<0.05). In principal component analysis of chemical properties and microbial populations in the upland soils, our findings suggested that population of bacteria should be considered as potential factor responsible for the clear orchard soils differentiation. The soil organic matter was significantly negative correlation with population of bacteria whereas was positive correlation with population of fungi in orchard soils.
단감 과원 토양 Fe, Mn 함량 변화와 pH 분석을 통한 석회소요량 추천
이영한(Young-Han Lee),최성태(Seong-Tae Choi),이성태(Seong-Tae Lee),홍광표(Kang-Pyo Hong),송원두(Won-Doo Song),이진호(Jin-Ho Lee),조주식(Ju-Sik Cho) 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.5
경남지역 단감 재배지 31개소의 토양 미량성분 변화를 조사하여 기초자료로 활용하고 농가현장에서 pH 분석 값을 적용하여 석회소요량을 신속하게 산출할 수 있는 계산식을 구하였다. 가용성 미량성분 함량의 변화는 4월이 표토에서 Fe 76.5 mg kg<SUP>-1</SUP>, Mn 46.1 mg kg<SUP>-1</SUP>,Zn 16.9 mg kg<SUP>-1</SUP> 이었고 심토는 Fe 55.5 mg kg<SUP>-1</SUP>, Mn 35.9 mg kg<SUP>-1</SUP>, Zn 12.3 mg kg<SUP>-1</SUP>으로 가장 높았으며 Mn 함량은 4월 이후 지속적으로 감소되었다. 표토의 pH가 높아짐에 따라 Fe 함량은 y=-18.8x+162(r=0.374, p≤0.001), Mn 함량은 y=-11.5x+98 (r=0.407,p≤0.001)의 고도로 유의적인 부의상관을 나타냈다. 단위면적당 석회소요량 (kg 10a<SUP>-1</SUP>)은 표토의 pH와 y=-171x+1,148 (r=0.881, p≤0.001), 심토의 pH는 y=-190x+1,247(r=0.855, p≤0.001)의 고도로 유의적인 부의상관을 보였다. 따라서 이러한 산술식을 이용할 경우 농가현장에서 석회소요량을 신속하게 산출하여 토양개량제를 시용할 수 있으며 pH로 인한 양분 불균형을 해소할 수 있을 것으로 기대된다. Sweet persimmon yield can be limited by soil pH. This study was performed to rapidly determine the optimal level of lime requirement in sweet persimmon field. Soil chemical properties such as Fe, Mn, and Zn were analyzed soil samples of 31 sweet persimmon fields at Gyeongnam Province every two months from April to October in 2008. The available Fe, Mn, and Zn content were significantly high top soil (76.5 mg kg<SUP>-1</SUP> for Fe, 46.1 mg kg<SUP>-1</SUP> for Mn, and 16.9 mg kg<SUP>-1</SUP> for Zn, respectively), and subsoil (55.5 mg kg<SUP>-1</SUP> for Fe, 35.9 mg kg<SUP>-1</SUP> for Mn, and 12.3 mg kg<SUP>-1</SUP> for Zn, respectively) in April. Furthermore, the Mn content was significantly decreased since April compared to other micronutrients. We found a significant negative correlation between soil pH and lime requirement (r=0.881, p≤0.001 for top soil, and r=0.855, p≤0.001 for subsoil). We suggest that a conversion factor is -171 top soil pH + 1,148 to lime requirement (kg 10a<SUP>-1</SUP>) for top soil, and -190 subsoil pH + 1,247 to lime requirement (kg 10a<SUP>-1</SUP>) for subsoil in sweet persimmon fields. These results supported that the improvement of lime requirement by soil pH value is necessary to rapidly apply to field, and prevent micronutrients over uptake by persimmon plant.