• 한국농공학회논문집
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• 제48권2호
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• pp.69-76
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• 2006

Fallow paddy areas have been increased due to the import of cheap agricultural product, and the unbalance between farming cost and rice price since 1990. The increasing fallow paddy area needs to be protected from the devastation by weed breeding for the re-cultivation. In this study, two fallow paddy fields managed with different water depth were selected for monitoring and analysing of water quality, water balance and plant body change. The managed fallow paddy fields were more effective in water quality purification and plants growth control than non-managed fallow paddy fields. And the fallow paddy field managed with some degree of water depth was the most effective field in terms of weed control.

• 한국농공학회논문집
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• 제48권3호
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• pp.35-45
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• 2006

Fallow paddy areas have been increased due to the import of cheap agricultural product, and the unbalance between farming cost and rice price since 1990. In domestic, rice production control that decrease paddy field area has been introduced for the control of rice demand and supply and stabilization of rice price since 2003. Because of the desire of paddy field's owner to create benefit by using paddy for other object, fallow paddy would be continuously increased. In the other aspect, many people in the world is suffering from hunger because of the shortage of food. In case of Korea, continuous drought and flood damages will be potential concern of stable food supply. From this viewpoint, the increasing fallow paddy area needs to be protected from the devastation by weed breeding for the re-cultivation. In this study, fallow paddy managed with the shallow pools and shallows was selected fur monitoring and analyzing of water quality and plant body change. As the results, the managed fallow paddy found to be effective in the purification of water quality and the control of plant growth.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.485-489
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• 2005

Fallow paddy has been increased in disadvantageous farming condition area because of importation of foreign agricultural products, labor cost and the imbalance between farming cost and agricultural products price since 1990. The fallow paddy that has gradually increased needs to be prevented from the devastation by weed breeding for re-cultivation. In this study, two fallow paddies that manage with different water depth from the experimental field were selected for observation, and analysis of water quality, water balance and plant body change. The managed fallow paddy was more effective in water quality purification and plants growth control than non-managed fallow paddy. And the fallow paddy managed with a some degree water depth was the most effective field on weed control.

• 한국농공학회논문집
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• 제51권1호
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• pp.33-39
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• 2009

A number of fallow paddies field continues to increase because of adverse agricultural circumstance such as upsurge income of foreign products, increase of labor costs in local community, imbalance between productivity and profitability etc. Such fallow paddies are necessary to be protected against weeds and trees. If fallow paddies are not managed, it will be devastated and needed cost for re-cultivation. Therefore, management of gradually increased fallow paddy fields should be conducted. In this study, the effect of plants growth inhibition and water quality purification through the control of flood in fallow paddy were examined in an experimental field. The managed and unmanaged fallow paddies through the control of water depth were constructed in the experimental field. The monitoring was conducted from 2005 to 2007. As the result, the managed fallow paddies were more effective than the unmanaged ones on the growth inhibition and water purification. In addition, when the fallow paddy is managed with regular water depth, it was the most effective in the plants growth inhibition.

• 한국환경농학회지
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• 제17권3호
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• pp.211-214
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• 1998

휴경답에서의 휴경년한에 따른 토양의 이화학적 특성과 주요 영양분의 변화 및 잡초종의 식생 변화를 조사하였다. 휴경년한이 경과할수록 휴경답 토양의 유기물 함량이 증가하였으며 pH는 휴경후 3년까지는 변화가 없었으나 이후로는 다소 증가하였다. 토양의 양이온치환용량 및 치환성 N, K, Ca, Mg의 함량은 휴경후 3년까지는 감소하였으나 휴경년한이 길어지면서 증가하였다. 유효 $P_2O_5$의 함량은 휴경년한이 길어지면서 지속적으로 감소한 반면 유효 $SiO_2$의 함량은 3년까지는 변화가 없었으나 그이후로는 증가하였다. 휴경답에서의 잡초종 구성은 초기에는 화본과, 사초과 및 국화과가 주종을 이루었으며 휴경년한이 경과할수록 마디풀과와 골풀과의 잡초 발생이 증가하는 반면 콩과, 물옥잠과, 닭의장풀과, 바늘꽃과의 잡초 발생이 점차 감소하였다. 그러나 화본과의 사초과의 잡초종은 휴경년한의 경과와는 관계없이 항상 우점종으로 발생하였다. 일반적으로 휴경화가 진전될수록 일년생 잡초종에 비해 다년생 잡초종의 발생 비율이, 또한 논 잡초종에 비해 밭 잡초종의 발생 비율이 높아지는 경향이 뚜렷하였다.

• Journal of Biosystems Engineering
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• 제28권2호
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• pp.107-116
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• 2003

One of the major obstructing factors against managing dairy farm in Korea has been a shortage of roughage supply. The shortage of roughage caused excessive use of concentrate feed increase of production cost and deterioration of cattle quality. In order to solve this problem for the dairy farm, use of fallow paddy field in the winter was feasible to produce barley and rye forage during the winter season after harvesting of in. And many desirable effects of raising cattle productivity, saving dollars for importing feeds and providing huge ground for manure spreading are expected by enlarged local roughage production. Through analysing the forage producing process, a mechanized operation model was developed for dairy farms in Korea. Its model consists of seeding models(till, no-till model) and harvesting models(wrap silage, traditional silage, hay model). Currently, the government policies are being executed to urge producing winter cereal wrap silage in the fallow paddy field with various supporting programs. Ant with enlarged local forage production, it is possible to make a new huge market fur forage producing machine.

• 한국응용곤충학회지
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• 제48권3호
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• pp.285-294
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• 2009

2004년에서 2005년까지 전 남북지역 휴경 논에 발생하는 식물, 해충 및 천적의 발생종류 및 발생정도를 조사하였다. 휴경 논에 발생하는 식물 종은 32과 124종, 해충은 30과 58종, 천적은 9과 11종 이었다. 식물 종은 벼과(Poaceae)와 국화과(Asteraceae)가 각각 28, 18종으로 발생량이 많았으며, 해충은 쌕새기, 애긴노린재, 시골가시허리노린재, 가시점둥글노린재, 끝동매미충, 애멸구 및 각다귀 1종의 발생량이 많았다. 휴경 논에 발생하는 해충 중 끝동매미충과 애멸구는 $5{\sim}6$월에 발생이 가장 적었고, 애멸구는 $8{\sim}9$월에 발생량이 가장 많았다. 천적곤충으로는 실잠자리류, 무당벌레, 꼬마남생이무당벌레, 꽃등에의 발생이 많았다.

• 한국잡초학회지
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• 제30권4호
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• pp.405-411
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• 2010

휴경논에 분포하고 있는 식생구조에 대해 식물사회학적 연구를 수행하였다. 총 22개 조사구에 대한 식생자료의 분석은 Zurich-Montpellier 학파의 방법을 이용하였다. 휴경논 식생조사 결과 1아군집, 5군락으로 구분되었다. 고마리군집(Polygonetum thunbergii Lohm. et Miyawaki 1962)의 고마리전형아군집, 골풀군락, 갈대군락, 물달개비군락, 사마귀풀군락, 부들군락. 요인분석에서 식생단위와 환경과의 상관관계를 보면, 사마귀풀군락과 물달개비군락은 토양 전질소와 음의 상관관계, 갈대군락과 고마리아군집은 토양 pH가 낮은 지역에 분포하는 것으로 분석되었다.

• 한국응용곤충학회지
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• 제23권4호
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• pp.237-241
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• 1984

이 시험은 우리나라 남부지방에 있어서 끝동매미충의 알에 기생율이 높은 Paracentrobia andoi의 포장생태에 대해서 조사한 결과는 다음과 같다. 1. 월동후 활동은 3월상순부터 활발하였으며 4월상순 이후 부터는 휴한답로 옮겨가는 경향이였다. 2 .휴한답의 둑새풀에서 끝동매미충의 알에 대한 기생율은 끝동매미충의 산란최성기인 4월하순에서 5월상순 사이에 $21\%$ 높은 경향이였다. 3. 휴한답에서 지역별 평균 기생율은 거창과 남지는 $0\%$, 남해, 김해 및 진주는 $9.6\~29.2\%$였다. 4. 본답에 있어서 이 알기생봉은 3회 발생을 하였으며 발생최성기는 8월중순과 10월초순경이였다. 5. 본답기에 있어서 끝동매미충의 2세기충(6월하순경 발생)과 3세대충(8월하순경 발생)에 대한 이 알기생봉의 평균 기생율은 각각 $16.5\%$와 $36.7\%$였다.

• 한국환경과학회지
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• 제30권8호
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• pp.659-671
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• 2021

The physicochemical properties of soil and the yield and quality of rice (Oryza sativa L. cv. Sailmi) were assessed using Italian ryegrass (Lolium multiflorum Lam. cv. Kowinearly)-rice double cropping systems in the paddy fields at Goseong and Miryang in southern Korea. The average temperatures during the ripening period were approximately 1 ℃ higher than the optimal temperature for rice ripening and the sunshine duration was reduced by frequent rainfall. Consequently, it was slightly below the optimal conditions required for rice ripening. In the soil at Goseong, winter Italian ryegrass cropping increased the pH, electrical conductivity, and the contents of organic matter, total nitrogen (T-N), available P₂O₅, K, Ca, and Mg than winter fallowing. Particularly, the contents of T-N and available P₂O₅increased significantly. In the soil at Miryang, Italian ryegrass slightly increased the electrical conductivity and the T-N, Mg, and Na contents. Therefore, winter Italian ryegrass cropping improved the physicochemical properties of paddy soils; however, Italian ryegrass-rice double cropping slightly reduced the culm length at both Goseong and Miryang, without markedly changing the panicle length or number compared to fallow-rice cropping. Furthermore, at Goseong, Italian ryegrass-rice double cropping slightly decreased the spikelet number and milled rice yield, and increased the ripened grain rate; however, at Miryang, contrasting results were observed. In addition, fallow-rice cropping revealed no differences in the head rice or opaque rice rates. The protein content was slightly increased in Italian ryegrass-rice double cropping, without significant changes in the amylose content or Toyo value, compared to that in fallow-rice cropping. The peak and breakdown viscosities were slightly decreased. These results indicate that winter Italian ryegrass cropping might alter rice taste but may not exhibit remarkable negative effects on rice cultivation. Therefore, Italian ryegrass-rice double cropping system is recommended for paddy fields in southern Korea. Nevertheless, to increase the rice yield and quality, fertilization standards for rice cropping that consider the changes in the T-N and organic matter contents in paddy fields caused by winter Italian ryegrass cropping need to be established.