• 한국토양비료학회지
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• 제44권4호
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• pp.534-538
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• 2011

One of the problems for cultivating crops in the mountainous highland is soil erosion and nutrients runoff. Alternative cropping ways were searched to reduce soil erosion and to ensure farm income in the mountainous highland agricultural region. Three edible wild plants including goatsbeard, Korean thistle, and aster, were selected to test as alternative crops to reduce soil erosion in mountain agriculture of highland area. In the first year, the soil losses from the alternative cropping were 26 to 63 percents of the soil loss from summer radish cultivated by conservation tillage with contour and plastic film mulching. The relative soil losses in the second year ranged from 2.8 to 5.5 percents in comparison with radish cultivation. Rapid surface coverage contributed to successive soil loss protection by these alternative crops. Farm net profit of these crops was greater than that of radish. Monitoring of yields of Korean thistle or aster for further experiments, however, might be necessary for economic cultivation due to yield reduction caused by consecutive production.

• 농업과학연구
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• 제40권2호
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• pp.169-176
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• 2013

The price and revenue of rice are expected to decrease due to increasing rice imports, decreasing consumption and the discontinuance of the government's rice procurement. This degenerating profitability is leading to a rise in the cultivation of upland-crops such as beans, fodder crops and fruits in paddy fields. However, there is a lack of research on the selection of rice substitute crops which are adaptable to the relevant region through profitability analysis. This research, therefore, analyzed investment profitability of rice substitute crops for Cheorwon-gun area in Kangwon province. The study applied net present value (NPV) and internal rate of return (IRR), which fit for mutually exclusive investments that make one selection to the exclusion of other crops. Target crops are green house plants in Cheorwon-gun area. Financial analysis showed paprika and cucumber have investment feasibility for automated vinyl greenhouses and conventional plastic greenhouses respectively.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1998년도 21세기 한반도 농업전망과 대책(한국작물학회.한국육종학회 공동주관 심포지움 회보)
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• pp.266-287
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• 1998

Environmental conditions and expected profit are the major criteria to select crops to be cultivated in any region. Traditionally, miscellaneous crops have been cultivated as alternative crop in case of unfavorable climate or supplementary crop in marginal lands. Since the successful breeding of high yielding varieties of staple crops and development of cultural techniques in 1970s in Korea, production of miscellaneous crops decreased markedly due to the rapid commercialization of agriculture and increased productions of horticultural crops, although yields have been doubled during the last $2\~3$ decades. On the other hand, animal husbandry has been developing remarkably parallel with national economic development and the increased consumption of animal products. As a result, imports of feed grains such as corn have increased rapidly, while roughage production became lower than demand. Among miscellaneous crops, corn production increased markedly through the development of hybrids and due to its importance as silage crops. Acreage of corn production including grains, fresh corns and feeding is about 120,000 ha, while acreage of buckwheat is about 5,000 ha and those of other miscellaneous crops decreased to a level of about 1,000 ha. Although miscellaneous crops have low yield potential and are unprofitable due to low price and imports of cheap foreign products, they should be kept to cultivate. Miscellaneous crops are important components that maintain diversity among upland crops as well as alternative crops in case of unfavorable climate. The low yield potential of miscellaneous crops might be due to lack of efforts to breed high yielding varieties and to develope cultural techniques. Continuous investment in research, exploitation of new utilization for miscellaneous crops as sustainable crop, honey crop and sightseeing crop, and development of healthy and special foods will promote their cultivation. Animal feeding in Korea depends mainly on formula feeds. As the number of animals increases to meet demand of animal products, there is no alternative way but to import grains to feed them. But roughage production, which is necessary for normal growth of ruminant animals, should be increased. However, lack of arable land and pasture land limits the production of good roughages. It is estimated that number of course for meat and milk production will be $2.5{\~}2.6$ million and total of $6.2{\~}7.5$ million tons of roughages should be produced. This implies that more than 1 million tons of roughage are needed, although pasture land, upland for forage crops, forage crops after rice cultivation and rice straw are utilized. Therefore, new reclamation of pasture land, increased roughage production in cultivating land, increased cultivation of forage crops after rice, more utilization of rice straw and active exploration of indigenous plant species as roughage resources should be promoted

• BMB Reports
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• 제46권9호
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• pp.439-447
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• 2013

Rice is a monocot gramineous crop, and one of the most important staple foods. Rice is considered a model species for most gramineous crops. Extensive research on rice has provided critical guidance for other crops, such as maize and wheat. In recent years, climate change and exacerbated soil degradation have resulted in a variety of abiotic stresses, such as greenhouse effects, lower temperatures, drought, floods, soil salinization and heavy metal pollution. As such, there is an extremely high demand for additional research, in order to address these negative factors. Studies have shown that the alternative splicing of many genes in rice is affected by stress conditions, suggesting that manipulation of the alternative splicing of specific genes may be an effective approach for rice to adapt to abiotic stress. With the advancement of microarrays, and more recently, next generation sequencing technology, several studies have shown that more than half of the genes in the rice genome undergo alternative splicing. This mini-review summarizes the latest progress in the research of splicing and alternative splicing in rice, compared to splicing in humans. Furthermore, we discuss how additional studies may change the landscape of investigation of rice functional genomics and genetically improved rice.

• 한국자원식물학회지
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• 제35권5호
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• pp.686-695
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• 2022

벼 대체 밭작물(검정콩, 들깨, 참깨)과 연계한 밀 이모작 작부체계를 적용한 논에서 조경밀 생산성과 밀가루의 품질 특성을 살펴보았다. 전작으로 검정콩, 참깨, 들깨를 재배하였던 포장은 벼를 재배한 논보다 토양의 pH는 높고, 전기전도도는 낮았다. 그리고, 유효인산(Av. P₂O₅), Ca²⁺과 Mg²⁺ 함량은 벼를 재배하였던 토양에서보다 높았다. 밀의 생육 특성 중 간장, 수장, 수수, 수당립수는 검정콩 전작 토양에서 전반적으로 양호하였다. 하지만, 밀의 수량은 벼 전작 토양에서보다 대체작물인 검정콩이나 참깨, 들깨의 전작 토양에서 모두100 kg/10a 이상 증가하였다. 더군다나, 단백질 함량과 SDS-침전가가 검정콩, 참깨, 들깨 전작에서 모두 벼 전작에서보다 높았으며, 아밀로스 함량은 벼 전작에서보다 검정콩, 들깨 전작에서 다소 낮았다. 이러한 결과들은 논토양에서 전작으로 참깨나 콩, 들깨 등의 벼 대체 작물들의 재배는 토양의 물리화학적 특성을 개선하고 제빵공정에 좀 더 유리한 고품질의 밀을 생산하는데 이바지할 수 있음을 보여준다.

• 한국약용작물학회지
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• 제15권2호
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• pp.95-99
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• 2007

The cost of conventional cultivation of ginseng (Panax ginseng C.A. Meyer) is very expensive, because shadow condition should be maintained during cultivation periods owing to inherently weak plant for high-temperature. Therefore, application of plant biotechnology may be possible to overcome these difficulties caused by conventional breeding of ginseng. Transgenic plants were produced via Agrobacterium tumefaciens Gv3101, both carrying the binary plasmid pBI121 mLPISO with nptII and Iso (isoprene synthase) gene. Integration of the transgenes into the P. ginseng nuclear genome was confirmed by PCR analysis using nptII primers and Iso primers. RT-PCR result also demonstrated the foreign isoprene synthase gene in three transgenic plant lines (T1, T3, and T5) which was expressed at the transcriptional level. When whole plants of transgenic ginseng were exposed to high temperature at $46^{\circ}C$ for 1 h, a non-transformed plant was wilted from heat shock, whereas a transgenic plant appeared to remain healthy. We suggest that the introduction of exogenous isoprene synthase is considered as alternative methods far generating thermotolerance ginseng.

• 경영과학
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• 제8권1호
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• pp.3-11
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• 1991

Non-Stationary transition probabilities models which is incorporated into a Markov framework with exogenous variables to account for some of variability are discussed, and extended for alternative procedure. Also as an application of the methodology, the size change of aggregate time-series data on the planted system of agricultural crops is estimated, and evaluated for the precision of time-varying evolution statistically.

• 한국환경농학회지
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• 제36권2호
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• pp.67-72
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• 2017

논에서 대체작물의 재배에 따른 토양 물리화학성과 작물 수량의 변화를 살펴보기 위하여 하성충적지에 분포된 규암 미사질 양토의 배수 약간양호인 토양에서 콩, 레드클로버, 공심채를 대체작물로 재배하여 3년간 경작시험을 수행하였다. 경작처리는 콩-벼-벼, 콩-콩-벼, 레드클로버-레드클로버-벼, 레드클로버-벼-벼, 공심채, 공심채-벼, 공심채-벼-벼 작부체계로, 3년차에는 모든 처리에서 논으로 복원한 다음 벼를 재배하여 토양 물리화학성과 작물 수량을 조사하였다. 앞그루가 밭일 때 토양의 용적밀도와 경도 수분함량이 감소하였고 공극률은 증가하였다. 대체작물을 2년 재배하였을 때에 1년 재배하였을 때보다 토양 입단량과 감수심이 높았다. 토양 유기물 함량은 레드클로버와 공심채를 2년 동안 재배하였을 때 높았다. 3년차에 유효인산과 치환성 칼리 함량 토양 CEC는 앞그루가 콩이었을 때 높았다. 대체작물의 1년차 생산성은 공심채가 레드클로버보다 높았으나, 2년차에는 반대였다. 3년차의 벼 수량은 앞그루가 콩과 레드클로버일 때가 공심채일 때보다 높았다.

• 한국초지조사료학회지
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• 제28권2호
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• pp.129-138
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• 2008

Demand for alternatives to petroleum is increasing the production of biofuels from food crops such as corn, soybeans, sorghum and sugarcane, etc. At least for the next 5 years, ethanol demand will be increased greatly in the United States and in the world. Presently, most ethanol produced in the United States is corn (Zea mays) ethanol. As a result, especially in the Americas and Southeast Asia, agricultural land is diverted to biofuel production. Even though biofuel industry has many advantage including national security, economical, energetical and sustainable impacts, it is driving grain prices up and creating considerable concern about the potential negative impacts on a wide range of food products that depend on gain : chicken, pork, beef, and dairy products such as milk, cheese, yoghurt, cream and ice cream. Feedstock crops are crops such as switchgrass(Panicum virgatum, L.), corn stover and grasses that can be used in industrial processes such as fermentation into alcohol fuels. Feedstock is no compete with food. Furthermore it is friendly environmental bioenergy crops. In Korea, with increasing demand for fossil fuels the exploration of alternative sources of liquid fuel is inevitable. I suggest Korea need to research and to develop actively on feedstock for biofuel production through this review.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2018년도 추계학술대회
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• pp.125-125
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• 2018