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토양 환경 조건이 파 흑색썩음균핵병 발생에 미치는 영향
김용범(Yong-Bum Kim),최인후(In-Hu Choi),김철우(Cheol-Woo Kim),방진기(Jin-Ki Bang),김용기(Yong-Gi Kim) 한국원예학회 2009 원예과학기술지 Vol.27 No.2
본 연구는 우리나라 서남부지방의 파 주산지에서 문제되고 있는 파 흑색썩음균핵병의 효과적인 방제를 위하여 병원균의 생리ㆍ생태를 구명코자 수행하였다. 흑색썩음균핵병 발아시기는 평균온도가 25℃ 최저온도 20℃ 내외인 8월 하순부터 토양온도가 20℃ 미만으로 떨어지는 9월 하순으로 판단되었고, 파 재배 주산지의 흑색썩음균핵병 최초 발병시기는 10월 하순이고, 11월 상순부터 익년 3월까지 점차 발병이 증가되었다. 사질토양 지역인 신안 임자도에서는 12월 이전에 흑색썩음균핵병이 발병되었으며 다른 주산지에서는 발병이 없었다. 또한 발병포장의 토양수분함량에 따른 발병률과의 관계를 조사한 결과 논 재배에서는 발병이 거의 없는 것으로 알려져 있으나, 본 실험이 수행되었던 시험포장은 사질 토양으로 자연강우나 스프링클러를 이용한 관수가 발병억제에 효과가 적은 것으로 나타났다. 또한 피해주는 지상부의 엽 고사 정도가 높아 초장이 짧게 나타났고, 지하부 또한 건전주에 비해 뿌리 고사율이 47% 정도 높았다. 수확 후 토양 내 균핵의 분포를 조사한 결과 수직방향은 지표 10㎝ 이내에 97%, 수평방향은 기주로 부터 20㎝ 이내에 86%의 균핵이 분포한 것으로 나타났다. 흑색썩음균핵병 이병잔존물을 투입한 포장에서는 당년에 사양토사질토는 100%의 이병률을 보였고, 양토는 80%의 이병률을 보였으며, 다음해에는 57.6-78.7%로 이병률이 다소 감소되었으나 이병식물체의 재투입으로 인한 발병률은 높게 나타났다. This study was conducted to establish the effective strategy to control white rot (Sclerotium cepivorum) of welsh onion in the main cultivation region at the southwestern part of the Korean peninsula, from 2003 to 2005. White rot was affected by environment factors such as temperature and relative humidity. White rot pathogen germinated and grew from the end of August in the low soil temperature (20℃) and at average temperature of 25℃ to the middle of September dropping the soil temperature below 20℃. Generation of white rot in welsh onion fields increasing infection area began from the late of October and widely spread from the early September to the early May of the following year. White rot in welsh onion fields increasing infection area began from the late October and widely spread from the early September to the early May in the following year. The Imjado with sandy soil area occurred in white rot before December, but other regions were not infected throughout the whole cultivation period. On the correlation of water content with disease infection, either rain or irrigation with sprinkler to welsh onion fields of dry condition was not effective, but in the rice fields the correlation were nearly not affected. Infected plants were short plant height caused by dried leaves, and 47% of the roots in the root stem were dead. After harvesting, the sclerotia of white rot pathogen was remained at 86% within 20 ㎝ depth from the host plants of soil in infected plants and at 97% within 10 ㎝ from vertical directions. Infected plants with the sclerotia to put in welsh onion farm that infected at 100% in sandy soil; the others were 80% in loam soil. However, the infected rate decreased to 57.6~78.7% in the following year. The high infected rate was caused by the remaining of the onion waste in the field after harvesting.
양파 정식시기별 서릿발 피해 방지 및 피해주 재이식 효과
권영석(Young-Seok Kwon),최인후(In-Hu Choi),김철우(Cheol-Woo Kim),최민선(Min-Seon Choi),곽정호(Jung-Ho Kwak),임용표(Yong-Pyo Lim) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.4
In the year 2013, onions cultivation in Jeonnam province suffered by frost-pillar damage. To reveal the aspects of the cause and outbreak, we surveyed those damaged areas. Usually the frost-pillar damage occurred in February. But the outbreak aspect is so unforeseeable. In 2013, the damage was shown as 10.6% in onion fields including paddy fields, but no damage was noticed in 2014. The damage was noticed as 77.8% in paddy fields and 30.1% in upland. And, by the difference of the onion transplanting date, it occurred as 0.7% by the middle of November to the early of November, 22% by the middle of November and 69.0% by the early of December. If one performed the supplementary planting at 3<SUP>rd</SUP> week of February, the highest survival percent was observed as 53.3%. If the date is early, another frost-pillar damage was occurred. If it’s late, the damaged plant was perished with dry. In any case, we found improper transplanting caused the yield decrease. Therefore, we recommend the timely transplanting is the most important way for the prevention of frost-pillar damage in the onion cultivation.
남부지역에서 ‘남도’ 마늘 대립주아 파종시기 및 파종간격이 종구생산에 미치는 영향
남상식(Sang Sik Nam),최인후(In Hu Choi),배상경(Sang Kyung Bae),방진기(Jin Ki Bang) 한국원예학회 2005 원예과학기술지 Vol.23 No.3
‘'남도’마늘 대립주아 재배 시 파종시기 및 파종간격이 종구로 사용 가능한 인편 씨마늘 생산량에 미치는 영향을 조사하기 위해 수행한 결과를 요약하면 다음과 같다. 난지형 마늘 재배지인 남부지역에서 0.5~0.7g 정도 크기의 대립주아를 재배할 경우 파종시기별 생육상황은 9월 15일과 25일 파종에서 초장이 77~79㎝, 엽수가 6매로 양호하였다. 마늘의 구경분포율은 9월 15일과 25일 파종이 대구 8.1%, 중구 23.3~26.1%로 10월 15일과 27일 파종에 비해 약간 높은 반면에 파종시기가 늦은 10월 15일과 27일 파종은 극소구율이 45.7~47.4%로 높았다. 종구로 사용 가능한 2.5g 이상의 인편 씨마늘 수는 9월 15일과 25일 파종에서 203~199개/m²로 많았다. 파종간격이 좁은 9×10㎝에서 마늘의 극소구율이 42.7%로 높았으며 구중은 18×10㎝의 17.8g에 비해 9×10㎝는 14.9g 정도였다. 종구로 사용 가능한 2.5g 이상의 인편 씨마늘 수는 9×10㎝에서 208개/m²로 많았다. This study was conducted to investigate the effects of planting dates and planting densities using the large bulbils for seed clove production of garlic ‘Namdo’ in Southern regions. The bulbils, 0.5~0.7 g were planted in 15 and 25 September, and in 6, 15 and 27 October. Planting densities were 18×10, 15×10, 12×10, and 9×10 ㎝. Vegetative growth of garlic in field was significant among the planting dates. In the distribution of bulb diameter, those planted in mid- and late October produced higher percentage of small bulbs, 45.7~47.4%. Bulb weight and yield of garlic decreased at later planting dates. Number of seed clove of over 2.5 g were in September planting 203~199 cloves/㎡ than in October planting. Number of seed clove over 2.5 g was the highest at the planting densities 9×10 ㎝. Thus, in large bulbil cultivation, the suitable planting dates is in mid- or late September with density of 9×10 ㎝.
Paraconiothyrium minitans S134의 마늘흑색썩음균핵병에 대한 생물적 방제
이상엽 ( Sang Yeob Lee ),홍성기 ( Sung Kee Hong ),최인후 ( In Hu Choi ),전용달 ( Yong Dal Chon ),김정준 ( Jeong Jun Kim ),한지희 ( Ji Hee Han ),김완규 ( Wan Gyu Kim ) 한국균학회 2012 韓國菌學會誌 Vol.40 No.4
Sclerotium cepivrum은 마늘과 같은 파속작물에 발생하는 흑색썩음균핵병의 병원균이다. 기생진균 Paraconiothyrium minitans S134 균주는 마늘 흑색썩음균핵병의 생물적 방제를 위하여 선발되었다. 포장실험은 태안에서 2011년 10월부터 2012년 6월까지 실시하였다. P. minitans S134 균주의 포자현탁액 (5 × 106ml)을 마늘 종구를 파종직후와 다음해 2월 하순에 주당 100 ml씩 각각 관주처리하여 6월 5일에 흑색썩음균핵병 발생 억제효과를 조사하였다. P, minitans S134 균주를 2회 관주처리구가 6.8%, 플루퀀 코나졸수화제 분의처리구가 0.4%, 무처리구가 19.5%의 흑색썩음균핵병이 발생하였다. 그러므로 P. minitans S134 균주는 마늘 흑색썩음균핵병에 대한 유망한 미생물농약으로서 가능성을 나타내었다. Sclerotium cepivorum is a causal agent of white rot disease on different plants including Allium species such as garlic. A mycoparasite, Paraconiothyrium minitans S134 was selected for biological control of sclerotinia rot of garlic caused by S. cepivorum. The experiment was carried out in a garlic field in Taean from October in 2011 to June in 2012. Spore suspension of the mycoparasite was treated twice onto soil surface around garlic plants in sowing in 2011 and late Feb. in 2012, and disease rating was made June in 2012, Incidence of white rot in the twice-application plot of the mycoparasite (5×106spores/mL) and in the fluquinconazole (WP)-treated plot was 6.8% and 0.4%, respectively, whereas that of control was 19.5%. As the results, P. minitans S134 could be a prospective biofungicide for biological control of white rot of garlic.
마늘 생장점 조직배양 후 포장에서의 년차별 생육 및 수량특성 변화
권영석(Young-Seok Kwon),최인후(In-Hu Choi),김철우(Cheol-Woo Kim),최민선(Min-Seon Choi),곽정호(Jung-Ho Kwak),임용표(Yong-Pyo Lim) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.4
In this research, we surveyed the yield change of garlic cultivation with seed bulbs according to annual field culture after induced meristem culture. From 2007 to 2013, yearly produced seed bulbs from 2<SUP>nd</SUP> to 8<SUP>th</SUP> generation were cultivated in the Muan field. Over the generations, the general growth characteristics such as the plant height, leaf number, leaf length and stem diameter were all decreased. When we compared the conventional seed bulbs and TCR ones, the plant height and stem diameter showed bigger difference. And the TCR seed bulbs showed a week late harvest time against the conventional ones. The yield of 2<SUP>nd</SUP> generation was 72.3 g and 57.1 g for the 8<SUP>th</SUP> generation. However every generation showed higher yield than conventional seed garlic’s ones as 43.9 g. The yield index showed the same trend as 2<SUP>nd</SUP>- 8<SUP>th</SUP> to 63% to 21%. After the tissue culture of garlics, the viral infections (OYDV and GSV) of TCR was far less than that of conventional ones. In case of LYSV, the infection ratio was 6.7% at 2<SUP>nd</SUP> generation and 26% at 8<SUP>th</SUP>. However, the ratio was far less than that (80%) of the conventional ones.