• Weed & Turfgrass Science
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• v.3 no.1
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• pp.6-12
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• 2014

The survey of weed occurrence was conducted to identify problem weed species in the paddy field. The 320 sites of the 13 regions in Gyeongbuk Province were investigated from June to July, 2013. In the whole region, 51 weed species were identified including 34 annuals and 17 perennials. The highest importance value of annual weed and perennial was dominant 88.4 and 48.7%, in Gumi region, respectively. The most dominant weed species in paddy fields of Gyeongbuk Province were Monochoria vaginalis var. plantaginea (10.80%), followed by Lemna paucicostata (10.74%), Bidens tripartite (8.77%), Echinochloa oryzoides (7.17%), and Scirpus juncoides (6.20%). The similarity of paddy weeds in 13 regions observed through TWINSPAN analysis was distinguished by Ludwigia prostrata, Scirpus juncoides, Lindernia dubia, Polygonum aviculare, and Alopecurus aequalis var. amurensis. The weed species, Ludwigia prostrata, was divided into the four regions, Gyeongju, Gumi(direct seeding cultivation), Youngcheon and Euiseong and ten regions, Gumi, Bonghwa, Sanju, Goryung, Youngdeog, Pohang, Sanju, Andong, Yecheon, and Cheongdo.

• Journal of fish pathology
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• v.9 no.2
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• pp.137-145
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• 1996

A specific disease syndrome, which led to massive mortality on larve of rockfish(Sebastes schlegeli) in marine hatcheries at Chungnam area during the period 1995~1996 was studied. The causative agent isolated from the diseased or dead larvae was identified as Vibrio ordalii on the basis of biochemical and biological characteristics. In the experimental challenges aganist 0 and 1 summer fish conducted at two different temperatures as $18^{\circ}C$ and $25^{\circ}C$, Vibrio ordalii showed higher virulence to no summer fish at $18^{\circ}C$ than 1-summer fish at $25^{\circ}C$. These results were consistent to field data obtained during epizootic outbreaks in the farms. Moribund and died larvae presented telangiectasis of secondary gill lamella and brain, dissecting of respiratory epithelium, atrophy of hepatic cells and necrosis of kidney associated with the presence of the bacteria. But the digestive tissue of these fish showed no significant change.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.22 no.1
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• pp.52-60
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• 1977

The affect of annual weeds to rice yield with morphological characteristics was evaluated. Rice heading date was shortened 1～5 days and rice culm length was shortened 5～10cm in heavy weed growing condition. No. of grains per panicle and no. of panicle per hill were the major yield components in yield reduction.

• Korean Journal of Weed Science
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• v.14 no.4
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• pp.258-264
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• 1994

The weed survey in lowland rice field in 1992 was conducted to identify weed population change as affected by different elevation, soil type and cultivation pattern at Gangweon province. There were more perennial weeds in plain and east coastal area while more annual weeds in mid alpine and alpine area. Meanwhile, perennial weed species was more dominant at ordinary and sandy soil but annual weed species was more dominant at poorly drained soil. In general, hand and machine(30 day old seedling) transplanting would result in higher dominant weed species of perennial while there was more annual weed species in machine (10 day old seedling) transplanting and dry seeding, respectively. Also, annual weed species was more predominant at spring plowing time compared to autumn plowing time. Particularly, there was change in dominant weed species with time. In 1971 annual weed species was more predominant but perennial weed species was highly dominant in 1981 and 1992.

• Korean Journal of Weed Science
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• v.14 no.3
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• pp.163-170
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• 1994

The experiment was conducted in 1993 to find out a simple prediction method of weeds and to make the prediction models of weeds in paddy fields. The annuals producing fine seeds were apt to emerge at sampling soil only, on the contrary the perennials and the annuals producing large seeds tended not to emerge at sampling soil due to the miss of seeds at sampling. There was no appropriate regression between a total number of weeds emerged at sampling soil and that of weeds occurred in fields. The important annual weeds occurring in fields were able to predict by the number of weeds emerged at sampling soil, but it was difficult to predict the important perennial weeds. In case of Bidens tripartita producing large seeds and Eleocharis kuroguwai producing large tubers, the prediction coefficients were high as above 1.0, and that of Echinochloa crus-galli and Sagittaria pygmaea were comparatively high as 0.175 and 0.172, respectively. However the coefficients of the other weeds were much low as below 0.08. The prediction models for 9 species were made. The model of six species including E. crus-galli, M. vaginalis, R. indica, B. tripartita, E. triandra and S. pygmaea were linear regression with high significance, however that of 3 species including C. difformis, S. juncoides and E. kuroguwai were curve regression with high significance.

• Proceedings of the KSCN Conference
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• 2003.05a
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• pp.149-149
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• 2003

토마토는 가지과에 속하는 일년생 작물로써 주로 온대지방에서 재배되며 세계각국에서 해마다 생산량이 증가하고 있고 우리나라에서도 기후풍토가 적합하여 전국적으로 재배되고 있다. 토마토는 특히 vitamin A와 ascorbic acid 가 풍부한 과일로 최근에는 각종 암, 비만, 심장질환 및 만성퇴행성 질환에 미치는 효과 등에 대한 연구가 활발히 진행되고 있다. 최근 우리나라의 모든 연령층에 걸쳐 칼슘 섭취 상태가 양호하지 못한 편으로 2001년도 국민영양조사(보건복지부 2002)에 의하면 우리나라 국민의 하루 평균 칼슘 섭취량이 권장량의 71.0%로 나타났다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.10a
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• pp.77-81
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• 1998

참외는 일년생 작물로 손자덩굴에 과실이 착과되며 포복재배를 하고 있어, 덩굴의 과번무로 인한 채광과 통풍불량 및 고온으로 착과와 과실비대가 부진하여 품질이 저하되며 호흡량의 증가로 광합성율의 저하와, 각종 병해충 및 생리장해인 발효과 발생으로 많은 피해를 주고 있는 실정이다. 조 등(1997)은 관행적인 포복재배에 의존하고 있어 단위 면적당 수량 증수는 크게 기대할 수 없다고 하였으며, 최 등(1996)은 지주재배에서 과실의 당도가 높았으며 기형과와 발효과의 감소로 상품과 수량은 증수되었다고 보고하였으며, 함 등(1996)은 줄유인재배는 수량 증수는 가져왔으나 줄유인 및 관리에 많은 노동력이 소요되었다고 하였다. (중략)

• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.418-421
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• 2009

Effects of aqueous ammonia soaking to three annual plants (hemp woody core, tobacco stalk and corn stover) awere investigated to focus on the enzymatic saccharification characteristics change by this treatment. At two different levels of treatment ($90^{\circ}C$-16 h and $45^{\circ}C$-6 days), higher temperature treatment led to more enzymatic saccharification of cellulose to glucose by commercial cellulase mixtures (Celluclast 1.5L and Novozym 342 from Novozyme Korea). Difference among annual plants were significant. corn stover was the best response to enzymatic saccharification of cellulose and xylan by comercial enzymes all treatment conditions but tobacco stalk was the worst response to all of them. chemical composition or physical structure difference may brought this difference.

• Asian Journal of Turfgrass Science
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• v.9 no.2
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• pp.137-157
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• 1995

Some indices of species of the Arundinella hirta communities in Cheolwon area were studied and the following results were obtained. The vegetational date was analyzed from six grass stands selected with the distance away from the DMZ in Cheolwon area. Species diversity was higher in the stand away from the DMZ than in that neat to it. All six stands are not considered to be free of disturbance. Species composition of the stands might be related to the degree of disturbance. It can be said that the destruction of the vegetation by periodical fire or cutting simplifies the species composition. In the rear district the human inter ference is supposed to be more frequent. But it is supposed to be slight in near the DMZ and that the degree of disturbance is not so destructive. This could be the explanation of high diversity in these stands.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.3 no.6
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• pp.34-44
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• 1982

1970년대 초부터 본격적으로 도입되기 시작하여 1974년 이래 급속한 사용증가를 기록한 우리나라의 벼농사용 제초제는 1980년을 최고로 95$\%$ 이상의 농가에 의해 매년 사용되고 있다. 1982년 5월 현재 정부에 의해 논잡초약으로 고시된 제초제의 종류는 14종 17게 품목이고 이들중 8종 10개 품목은 일년생 잡초약 그리고 6종 7개품목은 소위 다년생 잡초약으로 분류되고 있다. 그동안 벼의 소출에 직접 영향을 주는 살충제나 살균제의 중요성에 비추어 제초제는 상대적으로 그 중요성이 비교적 경시(輕視)되어 온 것이 사실이다. 그러나 1980년 이후 일반농가는 물론 정부의 제초제에 대한 관심이 두드러지게 높아져서 여러 가지 논의가 되고 다각도에서 심각한 검토가 이루어지고 있는 것이 현실이다. 이 기회에 필자가 평소에 생각해온 문제의 핵심과 그 대책을 기술함으로써 효과적인 잡초방제에 일조(一助)가 되기를 바란다.