http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
논 재배 팥 품종별 수량구성요소 및 에탄올 추출물의 항산화 성분 비교
전현정,정기열,최영대,이상훈,송석보,고지연,최지명,장윤우,Chun, Hyen Chung,Jung, Ki Yuol,Choi, Young Dae,Lee, Sanghun,Song, Seok bo,Ko, Jee Yeon,Choi, Ji Myung,Jang, Yun Woo 한국작물학회 2017 한국작물학회지 Vol.62 No.3
This study investigated the changes in yields, antioxidant compounds, and antioxidant activities among 11 adzuki bean cultivars cultivated in a paddy field with somewhat poorly drained soil. The adzuki bean cultivars were cultivated in the paddy field from 2015 to 2016 in Milyang, Gyeongsangnam, Korea. Average soil moisture content was 16.5% in 2015 and 31.0% in 2016 at the experimental site during adzuki bean cultivation. As the soil moisture content increased, most of the adzuki bean cultivars showed deceases in stem height, first setting pod node, number of pods, 100 seed weight, and yield. Chungju-pat produced the greatest yields among the 11 cultivars in 2015 and 2016, whereas Hongeon had the smallest yields. Adzuki bean yields after paddy field cultivation was lower for all cultivars than for adzuki bean yields from the same cultivars after upland field cultivation. Chungju-pat and Chilbo-pat showed the smallest decreases in yields after paddy field cultivation, whereas Hongeon and Kumsil showed the greatest yield reductions. There were no significant differences in proximate composition. Some mineral components ($P_2O_5$, Ca, and Mg) were statistically different across cultivars. Chungju-pat had the highest Ca and Mg contents, but antioxidant components (polyphenol and flavonoids) and antioxidant activities (ABTS and DPPH) were highest in Saegil and lowest in Jungbu-pat. PCA and clustering analyses, based on the growth, yield, and antioxidant component measurements, performed to identify which variables contributed the most to separating adzuki bean cultivars or to grouping cultivars with similar characteristics. These analyses showed that the antioxidant components and antioxidant activities had the most influence on grouping cultivars together. Among the 11 cultivars, Saegil was statistically different from the other cultivars, but the other 10 cultivars were not significantly different under paddy field cultivation. Soil moisture content affected adzuki bean yield and antioxidant component contents. An increase in soil moisture led to a decrease in yield, but an increase in antioxidant components. These results provide information that will improve the selection of an appropriate adzuki bean cultivar for use in paddy fields.
Comparison of pore shapes and water retention curves between anthropogenic and natural paddy fields
Hyen Chung Chun(전현정),Ki-Yuol Jung(정기열),YoungDae Choi(최영대),Su-min Jo(조수민),Sanghun Lee(이상훈),Byung-Keun Hyun(현병근),kook-sik Shin(신국식),Yeon-kyu Sonn(손연규),Hang-Won Kang(강항원) 한국토양비료학회 2015 한국토양비료학회 학술발표회 초록집 Vol.2015 No.12
Three Dimensional Measurements of Pore Morphological and Hydraulic Properties
Hyen-Chung Chun(전현정),Daniel Gimenez,Sung-Won Yoon(윤성원),Richard Heck,Laise Ziska,Kate Geaorge,Yeon-Kyu Sonn(손연규),Sang-Keun Ha(하상건),Tom Elliot 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.4
포어 네트웍 모델들 (Pore network model)은 토양 공극의 구조를 조사할 때 유용한 도구들이다. 이런 모델들은 삼차원 이미지들에서 공극의 구조와 관련된 양적 정보를 제공한다. 이 연구는 포어 네트웍 모델을 이용하여 공극의 구조와 수리학적 특성들을 양적으로 측정하였다. 연구목표는 큰 크기의 이미지에서 공극의 구조에 관한 양적 정보를얻기 위해 포어 네트웍 모델을 적용하고, 토양수분특성과 수리 전도도를 삼차원 이미지로부터 계산하고 이 값들은 실험을 통해 얻어진 실험값들과 결합하여 토양의 수리적 특성을 분석하는 것이었다. 토양 시료들은 발티모아 도시 중심에 있는발티모어 과학센터에 위치한 실험부지에서 채취되었다. 불교란 원주형 시료들이 채취되었고, 22 μm 의 해상도로 x선 단층 촬영되었다. 포어 네트웍은 중심축 변형에 의해 공극에서 축출되었고 이를 바탕으로 공극 구조가 계산되었다. 토양수분특성과 불포화 수리 전도도 값들은 토양 이미지에서 계산 되었다. 토양 밀도, 토양수분특성과 불포화 수리 전도도들은 3 토양 시료들로부터 실험을 통해 구하였다. 삼차원 이미지 분석은 토양 공극의 특성들을, 예를 들어 공극 부피, 길이, 굴곡도, 가장 정확히 분석하였다. 이런 정확한 분석은 토양 내 수문학적 정보를 정확히 산출할 수 있게 하였다. 계산된 값과 실험을 통한 실험치의 결합은 공극에 대한 더 광범한 범위를 분석할 수 있게 하였다. 이 연구를 통해 이미지에서 계산되고 측정된 수문학적 자료들은 토양내 대기공과 소기공을 모두 다 설명해 줄 수 있는 방법이라는 것이 밝혀졌다. Pore network models are useful tools to investigate soil pore geometry. These models provide quantitative information of pore geometry from 3D images. This study presents a pore network model to quantify pore structure and hydraulic characteristics. The objectives of this work were to apply the pore network model to characterize pore structure from large images to quantify pore structure, calculate water retention and hydraulic conductivity properties from a three dimensional soil image, and to combine measured hydraulic properties from experiments with calculated hydraulic properties from image. Soil samples were taken from a site located at the Baltimore science center, which is located inside of the city. Undisturbed columns were taken from the site and scanned with a computer tomographer at resolutions of 22 μm. Pore networks were extracted by medial-axis transformation and were used to measure pore geometry from one of the scanned samples. Water retention and unsaturated hydraulic conductivity values were calculated from the soil image. Properties of soil bulk density, water retention and unsaturated hydraulic conductivity were measured from three replicates of scanned soil samples. 3D image analysis provided accurate detailed pore properties such as individual pore volumes, pore length, and tortuosity of all pores. These data made possible to calculate accurate estimations of water retention and hydraulic conductivity. Combination of the calculated and measured hydraulic properties gave more accurate information on pore sizes over wider range than measured or calculated data alone. We could conclude that the hydraulic property computed from soil images and laboratory measurements can describe a full structure of intra- and inter-aggregate pores in soil.
Yearly Characterization of Soil Properties from Soybean Cultivation at Paddy Fields
Hyen Chung Chun(전현정),Sanghun Lee(이상훈),Hyeok Gong(공동혁),Ki Youl Jung(정기열) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11
Soybean(Glycine max (L) Merr.) cultivation from paddy fields has many benefits such as increase in yields, etc. However there have been found problems such as increase in desease and decrease in yields from contiguous soybean cultivation at paddy fields. This study investigated soil physical and chemical properties from paddy field soils by different soybean cultivation years; 1~3 year, 4~6 year and over 10 year. Ten sites from each year category were selected in Andong, Kyeongbuk and Gimje, Jeonbuk area in Korea. Soybean is only crop cultivated in all 30 sites and standard chemical fertilizer and manure were applied every year. Soil samples were taken during Mach and April before soybean planting in 2021. All samples were analyzed for physical properties such as soil texture, bulk density and soil moisture content and chemical properties such as pH, CEC, Available P₂O<SUB>5</SUB>, NO₃, etc. Statistical analyses were performed in SPSS(Statistical Package for the Social Science) at 95% siginificant level. Results of physical analyses did not show significant different as cultivation period increase, however chemical properties showed difference across different cultivation period. Values of NH₄ and NO₃ from over 10 year sites were significantly smaller than ones from less than 6 year sites. On the other hand, phosphate related properties, such as available P₂O<SUB>5</SUB> and organophosphoric acid, increased as soybean cultivation period increased. Paddy fields converted to soybean cultivation from rice under 3 years showed relatively great nitrogen and small phosphate values. These results may related to rice cultivation condition such as flooded condition. Nitrogen contents tend to decrease and phosphate contents to increase as soybean cultivation continues. This may be resulted in continuous application of fertilizer and manure to soil. Thsese results indicated that continuous cultivation of soybean in paddy fields may benefit for yield increase, but this benefit decrease under increase of cultivation period without manage chemical properties in soils.
Hyen Chung Chun(전현정),Sanghun Lee(이상훈),Hyeok Gong(공동혁),Ki Youl Jung(정기열) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11
Application of chemical fertilizer and manure to Soybean(Glycine max (L) Merr.) cultivation from paddy fields can cause degeneration in soil fertility and environmental pollution. In order to improve soil fertility with less fertilizer and manure, it is important to understand effects of fertilizer and manure in soybean cultivation from paddy fields. In this study, three paddy field sites were converted to upland by soybean cultivation located at Miryang in 2018. A chemical fertilizer and manure treatment were applied to one site (Chem+Manu), only chemical fertilzer treatment was applied to another site (Chem) and no fertilizer and manure to the third site (no treatment). Soybean has been cultivated in all three sties with three treatments every year. In order to compare upland soils with soybean cultivation, an upland field with continuous soybean cultivation with fertilizer and manure was selected as a upland soil site. All soil samples were taken during Mach and April before soybean planting in 2021. The sites with manure application had the same manure and this manure was also analyzed. All samples were analyzed for physical properties such as soil texture, bulk density and soil moisture content and chemical properties such as pH, CEC, Available P₂O<SUB>5</SUB>, NO₃, etc. All sites had the same soil texture as sitl loam. Statistical analyses were performed in SPSS(Statistical Package for the Social Science) at 95% significant level. Application of fertilizer and manure showed significantly different chemical and physical properties. Values of EC, organic matter content, organic carbon, and CEC were greater from the Chem+Manu soil than other soils. Soils from No treatment and Chem sites had no difference in soil properties. Meanwhile, NO₃ and NH₄ values were greater from all paddy field soils and smaller pH than the upland soil. Application of manure increased soil moisture content in soil, while the upland soil had the smallest soil moisture content and greatest bulk density. The upland soil site also had fertilizer and manure application similar to Chem+Manu site. But soil drainage level may cause these different physical property results. As a conclusion, application of fertilizer and manure will affect quality of soil and it is important manage quantitity of both application.