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조영손 ( Young Son Cho ),이병진 ( Byeong Jin Lee ),손다니엘 ( Daniel Son ),윤영환 ( Young Hwan Yoon ),양원하 ( Won Ha Yang ),서종호 ( Jong Ho Seo ),김충국 ( Chung Kook Kim ),손범영 ( Beom Young Son ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4
Under field conditions, 22 corn hybrids(CHs) were tested for several characteristics related to lodging resistance and excessive water stress, such as pushing resistance on 1.0 and 1.5 m hights of the corns and breaking point. The 22 corn CHs were selected because they showed strongest pushing resistance and breaking resistance of culm as well as the highest thickness of basal culm, leaf greenness, leaf area, and plant height based on two pre-pot experiments performed in phytotron. To make excess water condition, water irrigation was done at 1) 20-d after seeding, 2) 5th leaf stage, 3) tasseling stage, and 4) silking stage with 100 mm/day for 5 days. Lodging-related characteristics were measured: culm diameter, root dry weight, weight balance of above-ground plant, breaking resistance, and breaking height in field experiment. Among all the characteristics tested, we explained in the two critical points for lodging resistance: 1) breaking resistance and breaking point, 2) culm diameter with breaking resistance and breaking point, and they were further evaluated for the relationships with the 1.0 and 1.5m height of above-ground plant. In the corn hybrids, there was a positive correlation between breaking resistant and weight balance of corn at the silking stage water treatment at 1.0 and 1.5-m height. And breaking resistant and culm diameter had a positive relationship at the 20-d water treatment at both measuring height. In conclusion, selection for lodging resistant hybrids or germplasms to excess soilwater should be made at the 5th leaf stage water treatment, and basal culm thickness should be considered to evaluate the resistance of the corn hybrid plants to lodging.
연구보문 : 자연과학 ; 옥수수 생육초기 수분 stress 처리에 따른 교잡종들의 생육특성 비교
조영손 ( Young Son Cho ),이병진 ( Byeong Jin Lee ),손다니엘 ( Daniel Son ),( Rashid Ismael Hag Ibrahim ),손범영 ( Beom Young Son ) 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.3
A pot experiment was conducted in a phytotron to evaluate and select wet-resistant silage corn from 111 corn hybrids (CHs) under simulated heavy rain falls (80 mm for the 1st day and 50 mm from the 2nd till 11th day at 21±3oC) started at the 3rd leaf stage or 28 days after seeding. Growth related characteristics including dry weight of shoot, root, and leaf blade as well as leaf area, plant weight balance, and culm diameter were evaluated. Corn hybrid (CH) no.62 showed the tallest plant height and no.96 was the shortest. CH no.96 expressed the highest weight balance and no. 88 was the lowest. CH no. 59 gave the highest dry weight of shoot and no. 25 was the lightest. CH no.91 measured the thickest culm diameter at the basal 10 cm but no.24 was the thinnest. Dry weight of the basal 10 cm from culm was heaviest in no. 42 and lightest in no.25. Dry weight of root was highest in no.113 and lowest in no. 16. Dry weight of leaf area was heaviest in no.85 but lightest in no. 25. Analysis of coefficient of correlation positively connected culm diameter, plant height, and root weight to leaf area as well as culm diameter and plant height to root weight, while plant height and weight balance were negatively correlated. Weight balance to culm diameter or leaf area and culm diameter to root weight was not related.
굴(Crassostrea gigas)의 선도에 따른 pH, 글리코겐, 가용성단백질, 탁도와의 상관관계
손광태 ( Kwang Tae Son ),심길보 ( Kil Bo Shim ),임치원 ( Chi Won Lim ),윤나영 ( Na Young Yoon ),서정화 ( Jeong Hwa Seo ),정삼근 ( Sam Geun Jeong ),정우영 ( Woo Young Jeong ),조영제 ( Young Je Cho ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.5
We examined chemical changes in oysters Crassostrea gigas and packing water that were sold after storage at 5, 10, and 20℃. The pH of oysters stored at 5℃ dropped to 5.81 after 10 days of storage, while that of oysters at 10℃ and 20℃ dropped to 5.37 after 8 days and to 5.04 after 4 days, respectively. The glycogen content of oysters stored at 5℃ decreased from 718.89 to 421.85 mg/100g during storage, while that of oysters at 10℃ decreased to 351.49 mg/100 g after 4 days. The turbidity and soluble protein in packing water increased slightly. The viable cell count of oysters did not exceed 6 log CFU/g after 10 days of storage at 5℃, but that of oysters at 10℃ did so after 8 days. Additionally, the viable cell count of packing water was lower than that of oysters. We performed a principal component analysis, where the first principal component (55.03%-57.24%) and second principal component (42.76%-44.97%) described most variation. The first principal component included the pH of oysters and packing water, and the glycogen content of oysters. A Pearson correlation between the first two principal components had a higher R value than that between other components. Freshness was evaluated using the pH of oysters and packing water, and glycogen. We found that soluble protein content was significantly associated with a lower pH and glycogen content.
호밀녹비 이용 시 중질소($^{15}N$)를 이용한 질소원 유래별 콩의 집적질소 분획추정
서종호,이성희,조영손,이재은,이충근,권영업,Seo, Jong-Ho,Lee, Seong-Hee,Cho, Young-Son,Lee, Jae-Eun,Lee, Chung-Keun,Kwon, Young-Up 한국작물학회 2008 한국작물학회지 Vol.53 No.1
월동 후 녹비용 호밀에 시용한 질소가 콩의 질소고정 및 흡수에 미치는 효과를 보기 위하여, 2004년 온실 및 2005년 포장에서 포트시험을 통해 시비질소량별 토양, 호밀 및 콩의 질소회수율을 조사하였다. 1. 2004년 온실폿트 시험에서는 호밀에 시용한 질소비료 량이 증가할수록 호밀지상부가 토양에서보다 질소비료로부터 질소를 흡수하는 비율이 증가하였다. 호밀이 없는 조건에서는 논흙이 밭흙보다 콩의 건물 중 및 질소흡수량이 현저히 증가하였는데, 지력이 높았던 논흙에서는 밭흙에 비해 콩이 질소고정 유래 질소의 비율이 상대적으로 낮아지고 토양유래 질소의 비율이 높았다. 2. 밭흙에서 무녹비와 대비하였을 때 호밀녹비 이용 시의 콩 시비질소회수율은 낮았지만 토양의 시비질소회수율(질소유기화)이 높아 전체회수율은 높았으며, 또 호밀녹비 이용시 콩의 시비질소회수율은 호밀에 대한 질소시용량이 많을수록 증가하였다. 3. 2004년 온실포트 실험에서의 콩의 근류고정유래의 질소비율은 약 $92{\sim}95%$로 2005년 포장포트에서의 $82{\sim}84%$보다 약 10% 정도 높았으며, 콩의 근류고정유래 질소량 및 질소량 분획 추정에서는 2년 모두 Difference method와 $^{15}N$ method간 차이를 보이지 않았다. Winter season cultivation of rye as green manure for soybean have been a favorite with farmer because it could remove a risk of injury by continuous cropping and increase N uptake and yield of soybean. Effects of rye green manure on soybean N uptake, $N_2$ fixation and yield were investigated with $^{15}N$ as pot experiment in greenhouse in 2004 and field in 2005, respectively. The N derived from N fertilizer ($^{15}N$) in rye green manure increased with increasing of N fertilizer rate compared to N derived from soil. N uptake and DM yield of soybean at the pot with paddy soil was higher than those at the pot with upland soil mainly due to the increase of N uptake from paddy soil. Total $^{15}N$ recovery in soil was higher at rye green manure than no green manure because $^{15}N$ applied to rye plant was remained highly as soil organic N compared to chemical N fertilizer. $^{15}N$ recovery in soybean plant increased in proportion to amounts of N fertilizer applied to rye. The N fractions from $N_2$ fixation of soybean plant at the pot experiment in 2004 ranged from 92% to 95%, on the other hand those in field experiment in 2005 ranged from 82% to 84%. Estimation of amount of $N_2$ fixation was not different between Difference method and $^{15}N$ method in 2004 and 2005.
전승호,노일래,김영국,심두보,조영손,Jeon, Seung-Ho,Rho, Il-Rae,Kim, Young-Guk,Shim, Doo-Bo,Cho, Young-Son 한국유기농업학회 2018 韓國有機農業學會誌 Vol.26 No.2
This study was conducted to elucidate the effects of green manure crop on growth characteristics and saponin contents of Platycodin grandiflorum Ridix roots for organic farming. Rye, hairy vetch and rye+hairy vetch were cultivated as green manure crops with several different methods before transplanting P. grandiflorum Radix. In root width and number of fine-roots, when the highest scores (23.9 mm, 25.7) was recorded in rye pre-cultibated plot in $2^{nd}$ year cultivation. Fresh weight of the Platycodin grandiflorum Ridix root was no significant difference among the different green manure crop treatments, but fresh weights of the Platycodin grandiflorum Ridix root of all green manure crop treatments were higher than that of control. The total content of saponin was highest detected in Platycodin grandiflorum Ridix roots of the hairy vetch plot (1,106 mg/100 g) and rye plot (1,693 mg/100 g) in $1^{st}$ and $2^{nd}$ year cultivation, respectively. Therefore, we confirmed that precultivation of the green manure crops showed significant differences in the growth characteristics and saponin contents of the Platycodin grandiflorum Ridix root, and growth and saponin contents in the Platycodin grandiflorum Ridix root of rye precultivated plot was much higher in $2^{nd}$ year cultivation than $1^{st}$ year cultivation. 이 연구는 도라지의 유기재배를 위하여 3년근 이식 예정지에 풋거름 작물 재배에 따른 도라지 뿌리의 생육특성 및 사포닌 함량에 미치는 영향을 구명하고자 실시되었다. 생육특성에서는 기재배지에서의 뿌리의 직경 및 곁뿌리 수는 호밀 재배구에서 가장 굵거나 많았으며, 뿌리 생체중은 풋거름작물 재배구간 차이는 없었으나, 대조구에 비해 높게 나타났다. 도라지 뿌리의 무기성분 함량에서는 무기성분별 유의성이 있는 것으로 나타났으며 특히, 기재배지에서의 호밀 처리구에서 높은 함량이 나타났다. 사포닌 함량의 변화에서는 기재배지에서는 호밀 재배구에서 모든 사포닌 함량이 가장 높은 함량으로 나타났으며, 새재배지에서는 헤어리베치 재배구에서 높은 함량을 나타냈다. 대조구에 비해 풋거름작물 재배구의 기재배지와 새재배지 모든 재배구에서 사포닌의 함량이 높게 나타났다. 따라서 도라지 유기재배 시 풋거름작물에 따른 뿌리의 생육 특성 및 약리성의 변화 등의 유의적인 차이가 나타나는 것을 확인할 수 있었으며, 연차 간 재배 시 호밀 재배구에 생육 및 약리성이 우수한 것으로 나타났다.