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벼 담수직파 시 Benzobicyclon 혼합제와 Carfentrazone-ethyl 혼합제의 제초활성
박수혁(Su Hyuk Park),허유리(Yu Ri Heo),원옥재(Ok Jae Won),황기선(Ki Seon Hwang),엄민용(Min Yong Eom),한성민(Sung Min Han),박기웅(Kee Woong Park) 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.3
This study was conducted to evaluate the efficacy of herbicide mixtures of benzobicyclon and carfentrazone-ethyl in direct-seeding flooded rice. The efficacy of benzobicyclon mixtures and carfentrazone-ethyl mixtures was greater than that of pyrazosolfuron-ethyl + pyriminobac-methyl GR. Herbicide mixtures with benzobicyclon controlled average 97% and herbicide mixtures with carfentrazone-ethyl controlled average 95% 60 days after application. When compared with untreated control, no visual injuries were detected at single and double dosage of herbicide mixtures. The yield of rice increased in both benzobicyclon and carfentrazone-ethyl treatments when compared with pyrazosolfuron-ethyl + pyriminobacmethyl GR. Based on these data, combinations of these herbicides can be applied to provide effective weed management in rice field.
박수혁 ( Su-hyuk Park ),임해창 ( Hae-chang Rim ) 한국정보처리학회 2008 한국정보처리학회 학술대회논문집 Vol.15 No.1
본 논문은 언어의 통계적 특징을 이용하여 범용의 문장경계 인식기를 제안한다. 제안하는 방법은 대량의 코퍼스 내에서 사용되고 있는 문장 경계를 기준으로 음절 및 어절 등의 자질을 이용하여 통계적 특징을 추출하고 다양한 기계학습 기법을 사용하여 문장경계를 인식하고자 하였다. 또한 특정 언어나 도메인에 제한적이지 않고 범용적인 자질만을 사용하려고 노력하였다. 언어의 특성상 문장의 구분이 애매한 경우 또는 잘못 사용 된 구두점 등의 경우에도 적용 가능 하도록 다양한 자질을 사용하여 실험하였으며, 한국어와 영문 코퍼스에 대해서 동일한 자질을 적용하여 실험하여 본 논문에서 제시한 자질들이 한국어 및 다른 언어권의 언어에도 적용될 수 있는 범용적인 자질임을 확인할 수 있었다. 한국어 문장경계 인식을 위한 기계학습 및 실험을 위해서 세종계획 코퍼스를 사용하였으며, 성능척도로는 정확률과 재현율을 사용하였으며, 실험결과 제안한 방법으로 99%의 정확률과 99.2%의 재현율을 보였다. 영문의 경우는 Wall Street Journal 코퍼스를 사용하였으며, 동일한 자질을 적용하여 실험한 결과 98.9%의 정확률과 94.6%의 재현율을 보였다.
농업용 무인 헬기를 이용한 benzobicyclon 혼합제의 잡초방제 효과
박수혁(Su Hyuk Park),원옥재(Ok Jae Won),엄민용(Min Yong Eom),한성민(Sung Min Han),황기선(Ki Seon Hwang),서수정(Su Jung Seo),박기웅(Kee Woong Park) 충남대학교 농업과학연구소 2014 농업과학연구 Vol.41 No.2
This study was conducted to evaluate the efficacy of benzobicyclon mixtures by using Remote-controlled aerial application (RCAA) to control annual and perennial weeds in rice paddy field. Eight annual weed species including Echinochloa crus-galli L. and three perennial weeds were dominated in the experimental field. Application of benzobicyclon mixtures using RCAA was highly effective to control both annual and perennial weed species. When compared with untreated control, no visual injuries were detected at single and double dosage of benzobicyclon mixtures. Finally, rice yield in the benzobicyclon mixtures was as much as that in the hand weeding. This study indicates that benzobicyclon mixtures using RCAA can be applied to control both annual and perennial weed species in rice paddy field.
원옥재(Ok Jae Won),박기웅(Kee Woong Park),박수혁(Su Hyuk Park),엄민용(Min Yong Eom),강광식(Kwang Sik Kang) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.2
This study was conducted to evaluate the efficacy of herbicide in winter cereal crops, barley and wheat. The efficacy of soil-applied herbicides, linuron EC and pendimethalin, thiobencarb GR was greater than that of butachlor EC. Linuron EC controlled average 95% and pendimethalin, thiobencarb GR controlled average 97% within 150 days after soil-applied treatment. When compared with untreated control, no visual injuries were detected at single and double dosage of linuron EC and pendimethalin, thiobencarb GR. The yield of barley increased in linuron EC and wheat increased in pendimethalin, thiobencarb GR treatments when compared with butachlor EC. The efficacy of foliage treatment, bentazone+propanil ME was greater than that of bentazone SL. Bentazone+propanil ME controlled average 96% in barley and 97% in wheat, within 30 days after foliage treatment. When compared with untreated control, no visual injuries were detected at single and double dosage of bentazone+propanil ME. The yield of barley and wheat increased in bentazone+propanil ME treatments when compared with bentazone SL. Based on these data, combinations of these herbicides could be applied to provide effective weed management in barley and wheat field.
논에서 솔잎과 쌀겨의 혼합처리가 잡초방제 및 벼 수량에 미치는 영향
이상일(Sang Ill Lee),박기웅(Kee Woong Park),원옥재(OK Jae Won),박수혁(Su Hyuk Park),엄민용(Min Yong Eom),황기선(Ki Seon Hwang),김영태(Young Tae Kim),변종영(Jong Yeong Pyon) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.2
Combined applications of rice bran with pine leaves were tested to examine the inhibitory effects to paddy weeds and increased yield of rice for developing techniques of environment-friendly weed management in paddy rice fields. Weed control efficacy at 60 days after treatment was improved to 88.8% by combined application of rice bran with pine leaves, while weed control efficacy by single application of rice bran showed 67.5%. The other weed control efficacy combined with chestnut leaves and barley straws were 76.3% and 69.9% respectively. Combined application of rice bran with pine leaves was more effective to broadleaf weeds such as Monochoria vaginalis. Weed control efficacy by combined application with pine leaves was 100% until 70 days after rice transplanting and maintained weed control effect up to 90 days after transplanting. Rice yield by combined application of rice bran with pine leaves was 526 ㎏/10 a, which was higher yield than by combined application with barley straws, single application of rice bran, natural snail application and hand weeding.
벼 담수직파에서 Carfentrazone-ethyl 혼합제의 제초활성
원옥재(OK Jae Won),박기웅(Kee Woong Park),박수혁(Su Hyuk Park),엄민용(Min Yong Eom),황기선(Ki Seon Hwang),김영태(Young Tae Kim),변종영(Jong Yeong Pyon) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.2
This study was conducted to evaluate the herbicidal efficacy of carfentrazone-ethyl mixtures in direct-seeding flooded rice. The efficacy of three different carfentrazone-ethly mixtures was greater than pyrazosulfuron-ethyl pyriminobac-methyl GR (PP GR). Weeding efficacy of three different carfentrazone-ethly mixtures was more than 96.9%. No phytotoxic effect was observed in the rice based on the plant height and the number of tillers. Yield of rice un three different carfentrazone-ethly mixtures application was more than both in the PP GR and in the hand weeding. Based on these data, three different carfentrazone-ethly mixtures can be applied to provide an effective weed management in direct-seeding flooded rice.
황기선(Ki Seon Hwang),엄민용(Min Yong Eom),박수혁(Su Hyuk Park),원옥재(Ok Jae Won),서수정(Su Jeoung Suh),이인용(In Yong Lee),박기웅(Kee Woong Park) 충남대학교 농업과학연구소 2014 농업과학연구 Vol.41 No.4
This study was conducted in order to utilize the basic data for weed control by surveying the occurrence of weed species. Total 63 sites of upland Chinese cabbage fields in Chungnam Provinces were investigated. The result of survey, 71 weed species in 25 families were identified and classified to 39 annuals, 16 biennials and 16 perennials. Based on the occurrence ratio, the most weed species belonged to Compositae (20 species). 8, 6 and 5 weed species belonged to Poaceae, Cruciferae and Polygonaceae, respectively, and these 10 weed species in the most six families accounted for 50% of total weed occurrence. The most dominant weed species in upland Chinese cabbage fields were Portulaca oleracea (8.07%), followed by Digitaria ciliaris (7.54%), Rorippa palustris (6.44%), Chenopodium album (5.73%), Echinochloa crus-galli (5.02%) and Cyperus amuricus (3.95).