• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.141-141
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• 2022

• 한국환경농학회지
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• 제39권3호
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• pp.188-196
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• 2020

BACKGROUND: In order to cultivate upland crops in reclaimed land, economically appropriate crops should be selected. Jerusalem artichoke (Helianthus tuberosus L.) is one of the primary sources for inulin in higher plants. The objective of this study was to evaluate and compare growth and inulin of H. tuberosus L. according to the cultivation region in Korea. METHODS AND RESULTS: 21 varieties of H. tuberosus L. were collected in Korea, and then 7 varieties of H. tuberosus L. were selected for this study. To compare growth and inulin, those varieties were cultivated in reclaimed land and upland soils. The growth of H. tuberosus L. significantly decreased when cultivated in reclaimed land. There was an increas at 17.8% in the content of white H. tuberosus L. tuber inulin in reclaimed land. CONCLUSION: The content of inulin in H. tuberosus L. tubers was found to be dependent on cultivation region and tuber color. There was a difference of the inulin content between the tubers with different colors in reclaimed land. Purple tubers of P20 were considered suitable varieties for cultivation in reclaimed land. White tubers of W1 and W8 were also considered suitable varieties for cultivation in reclaimed land.

• 한국환경농학회지
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• 제39권4호
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• pp.327-333
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• 2020

BACKGROUND: Through Saemangeum development project, 283 ㎢ of new land is planned to be created and the reclaimed land of 89.7 ㎢ will be used as agricultural land. Therefore, monitoring of soil salinity is required to evaluate the suitability of the land for agricultural purposes. METHODS AND RESULTS: We investigated changes of soil physico-chemical properties, including electric conductivity (EC), of the Saemangeum reclaimed tidal land (1,195 ha) from 2008 to 2017 to obtain basic data for suitable soil management of the Saemangeum reclaimed tidal land. Soil samples were collected from the sites spaced 200 meters apart from each other. Soil analysis results showed that average soil EC was 14.5 dS m-1 in 2008, and decreased to 6.5 dS m-1 in 2014 and to 0.9 dS m-1 in 2017. Accordingly, the soil area below soil EC 4.7 dS m-1 (accepted as farmable soil salinity) increased; 25.0% in 2008, 54.3% in 2014, and 96.9% in 2017. The annual decrease in soil EC was described as y = -1.5756x + 14.6 (R2= 0.96), where y = soil EC and x = elapsed years since 2008. CONCLUSION: The soil salinity have decreased to a level for cultivation of most edible crops. However, since the soil chemical properties, such as soil organic matter were inadequate for the cultivation of crops, it was suggested that management of soil fertility would be important for efficient agricultural use of Saemangeum reclaimed land.

• 한국토양비료학회지
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• 제7권3호
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• pp.137-140
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• 1974

개간지(開墾地)에 대(對)한 영농상태(營農狀態) 토양조건(土壤條件) 생산성등(生産性等)을 파악(把握)하기 위(爲)하여 전국(全國) 개간지(開墾地)를 대상(對象)으로 현황조사(現況調査)를 실시(實施)한 결과(結果)는 다음과 같다. 1. 개간(開墾)에 참여(參與)한 농가(農家)는 1ha미만(未滿)의 기경지(旣耕地)를 소유(所有)하고 있는 영세농(零細農)이 42.6%중농(中農)이 46.3%, 그리고 대농(大農)(3ha이상)이 11.1%였다. 2. 개간지(開墾地)의 토지이용(土地利用)은 개간년차(開墾年次) 따라 차이(差異)가 심(甚)하나 전작(田作) 28.6%, 과수(果樹) 11.7%, 상전(桑田) 33.8 그리고 초지(草地)가 25.9%였으며 최근(最近)에 와서 상전(桑田)은 점차(漸次) 감소(減少)하는데 반(反)하여 초지(草地)는 급진적(急進的)으로 증가(增加)하고 있다. 3. 개간지(開墾地)의 토양경사(土壤傾斜)는 15% 미만(未滿)이 68.7%이었으며 경사(傾斜)가 심(甚)한 곳에서는 계단식(階段式) 개간(開墾)을 경사(傾斜)가 낮은 곳에서는 원지형개간(原地形開墾)을 실시(實施)하고 있었다. 4. 개간지(開墾地)의 화학적성분(化學的成分) 함량(含量)을 극(極)히 낮으며 인산(燐酸)을 제외(除外)하고는 개간후(開墾後) 10년(年)이 경과(經過)되어도 숙전(熟田)에 비(比)하여 매우 미달(未達)하고 있었다. 5. 개간지(開墾地)에 시용(施用)하는 삼요소(三要素) 시비량(施肥量)은 추천시(推薦施) 비량(肥量)에 비(比)하여 매우 적다. 6. 개간지(開墾地)의 수량(收量)은 콩을 제외(除外)하고는 개간후(開墾後) 10년(年)이 경과(經過)하여도 전국(全國) 평균수량(平均收量)에 비(比)하여 30~86%에 지나지 않았다.

• 한국농공학회논문집
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• 제59권6호
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• pp.81-87
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• 2017

The total area of domestic reclaimed lands is 54,379 ha, and among these, 30,394 ha can be agriculturally available. To increase an agricultural availability of reclaimed land, controlled horticultural products that can be highly profitable have come to the fore. However, as being characteristically concerning, when original glasshouse is intactly applied in reclaimed land, it is unsafe on account of ground subsidence and, even if ground were reinforced, it has a problem by high cost. So a new greenhouse model would be necessary taking into account not only cost-efficiency but also safety with relatively light-weight one. Before this, this paper estimated acceptance rate of controlled horticultural complexes in reclaimed land and new greenhouse model for 414 farmers. The annual rental fee is 129,712,500 won/ha, considering the interest rate (2.5 %) of the investment, the depreciation cost of the facilities (straight line depreciation method, 20 years of service life estimated), and government subsidy rate (50 %) which resulted in a sufficient number of intended tenants with the acceptance rate of 0.33. The results of this paper may contribute to the government's policies for reclaimed land.

• 한국작물학회지
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• 제64권2호
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• pp.109-126
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• 2019

새만금 간척지에서 적응 가능한 잡곡자원을 선발하기 위하여 조, 기장, 수수 등 3종의 잡곡 유전자원 84종을 수집하였다. 수집 자원을 간척지에서 재배하면서 적응성을 검정한 결과 수수의 간척지 적응성이 가장 우수하였다. 대표적인 생육 요소인 초장의 간척지/일반지 비율을 측정한 결과 수수가 0.82로 간척지에서도 일반지에 비하여 크게 떨어지지 않는 생육상황을 보이는 것으로 확인되었고 기장은 0.61, 조는 0.51 순이었다. 수수자원 중 우수한 간척지 적응성을 가진 유전자원으로 까만수수, 사탕대죽, 남풍찰 3종이 선발되었다. 사탕대죽은 간척지 수량 229.4 kg/10a로 간척지/일반지 수량 비율이 89.3%이었으며 까만수수는 227.4 kg/10a로 간척지/일반지 수량 비율 87.8%를 나타내었고 남풍찰은 간척지에서의 수량이 일반지 수량의 86.0%인 239.6 kg/10a로 우수한 간척지 적응성 자원으로 선발되었다. 선발자원의 내염성 정도를 구명하기 위하여 포트에서 천일염을 사용하여 염농도를 1.0%까지 처리하고 지상부 및 지하부 생육과 광합성 능력 등을 검정한 결과 사탕대죽, 남풍찰, 까만수수 모두 높은 내염 정도를 가진 것으로 확인되었으며 가장 강한 내염성을 가진 수수 자원은 사탕대죽이었다. 간척지 생산 수수 자원의 기능성 향상을 확인하기 위하여 폴리페놀과 플라보노이드 함량 그리고 유해 활성산소 제거능을 확인하였고 ${\alpha}$-glicosidase 억제 활성을 통하여 항당뇨 활성을 분석하였다. 기능성 분석 항목 모두에서 간척지 재배 생산물의 기능성이 일반지 생산물에 비하여 향상되는 것을 확인되었는데 항산화 성분인 폴리페놀은 간척지 재배 시 함량 증가율 범위가 2%~26%이었으며, 플라보노이드 함량은 8.5%~55.6%로 함량이 증가하였다. DPPH 소거능도 간척지 재배시 16.7%p~47.0%p 증가하여 유해 활성산소 제거능력도 향상되는 것을 알 수 있었다. ${\alpha}$-glicosidase 억제 활성도 선발자원별로 18.4%p~19.9%p 높아서 항당뇨 활성도 간척지 재배에서 증가하였다.

• 대한원격탐사학회지
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• 제39권1호
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• pp.47-63
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• 2023

Unmanned aerial vehicle (UAV) and sensor technologies are rapidly developing and being usefully utilized for spatial information-based agricultural management and smart agriculture. Until now, there have been many difficulties in obtaining production information in a timely manner for large-scale agriculture on reclaimed land. However, smart agriculture that utilizes sensors, information technology, and UAV technology and can efficiently manage a large amount of farmland with a small number of people is expected to become more common in the near future. In this study, we evaluated the productivity of forage maize grown on reclaimed land using UAV and sensor-based technologies. This study compared the plant height, vegetation cover ratio, fresh biomass, and dry biomass of maize grown on general farmland and reclaimed land in South Korea. A biomass model was constructed based on plant height, cover ratio, and volume-based biomass using UAV-based images and Farm-Map, and related estimates were obtained. The fresh biomass was estimated with a very precise model (R² =0.97, root mean square error [RMSE]=3.18 t/ha, normalized RMSE [nRMSE]=8.08%). The estimated dry biomass had a coefficient of determination of 0.86, an RMSE of 1.51 t/ha, and an nRMSE of 12.61%. The average plant height distribution for each field lot was about 0.91 m for reclaimed land and about 1.89 m for general farmland, which was analyzed to be a difference of about 48%. The average proportion of the maize fraction in each field lot was approximately 65% in reclaimed land and 94% in general farmland, showing a difference of about 29%. The average fresh biomass of each reclaimed land field lot was 10 t/ha, which was about 36% lower than that of general farmland (28.1 t/ha). The average dry biomass in each field lot was about 4.22 t/ha in reclaimed land and about 8 t/ha in general farmland, with the reclaimed land having approximately 53% of the dry biomass of the general farmland. Based on these results, UAV and sensor-based images confirmed that it is possible to accurately analyze agricultural information and crop growth conditions in a large area. It is expected that the technology and methods used in this study will be useful for implementing field-smart agriculture in large reclaimed areas.

• 한국토양비료학회지
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• 제44권5호
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• pp.752-761
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• 2011

Recently, upland crops cultivation instead of paddy crops are more popular and highlighted by increase of social demand in agricultural land use. Especially, wheat cultivation for replacing of import food grain are more interested by government, and it is urgently needed that possibility of wheat cultivation is evaluated in the reclaimed tidal land. Crop cultivation is closely related with soil salinity and cultivation method in the reclaimed tidal land. In order to evaluate possibility of wheat cultivation, effect of different application level of compost and nitrogen additional fertilizer, also soil salinity on the grain yield and yield components of three wheat cultivars was studied at the newly reclaimed Saemangeum and Hwanong tidal lands in Korea. $270-300kg\;10a^{-1}$ of grain yield were obtained at the experimental site in the Saemangeum reclaimed tidal land where soil salinity was less than $4dS\;m^{-1}$ during growing periods from December, 2009 to June, 2010. However, almost no grain yield was obtained at the experimental site in the Hwaong reclaimed tidal land, where soil salinity was more than average $8dS\;m^{-1}$ ranged from 2.0 to $25.9dS\;m^{-1}$ during growing period and then salt demage was severe. Yield was significantly different among application level of compost and nitrogen additional fertilizer in the newly reclaimed Saemangeum tidal land. However, it is considered that three cultivars such as Chopum, Chogyung and Geumgang, have similar sensibility to soil salinity and fertilizer level, because there is statistically no difference among ciltivars in Hwaong and Saemangeum, and also among cultivars in the different levels of compost and fertilizer. Finally, it is concluded that wheat can be possibly produced by reasonable fertilizer application in the Saemangeum reclaimed tidal land, but wheat cultivation is impossible because of high soil salinity in the Hwaong reclaimed tidal land.

• 한국토양비료학회지
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• 제47권6호
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• pp.398-405
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• 2014

Salt accumulation at soil surface is one of the most detrimental factors for crop production in reclaimed tidal land. This study was conducted to investigate the effect of capillary barriers beneath the soil surface on dynamics of soil salts at coarse-textured reclaimed tidal land. A field experiment was conducted at Saemangeum reclaimed tidal land for two years (2012-2013). Capillary barriers ($3.5{\times}12m$) were treated with crushed-stone, oyster shell waste, coal briquette ash, coal bottom ash, rice hull and woodchip at 40-60 cm depth from soil surface. Silage corn (Zea mays) was cultivated during the experimental period and soil salinity was monitored periodically. Soil salinity was significantly reduced with capillary barrier compared to that of control. Oyster shell waste was one of the most effective capillary barrier materials to control soil salinity at Saemangeum reclaimed tidal land. At the first growing season capillary barrier did not influence on corn growth regardless of types of the material, but plant biomass and withering rate of corn were significantly improved with capillary barrier at the second growing season. The results of this study showed that capillary barrier was effective on the control of soil salinity and improvement of corn growth, which indicated that capillary barrier treatment can be considered one of the best management practices for stable crop production at Saemangeum reclaimed tidal land.

• 한국작물학회지
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• 제68권4호
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• pp.413-421
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• 2023

본 연구는 간척지 들깨 재배을 위하여 품종별 NaCl 처리, 치상온도 조건에 따른 발아율과 토양 용적밀도, 염농도, 종자 파종깊에 따른 출현 후 생존율을 분석하여 간척지 새로운 소득작물로써 들깨의 안정적 재배를 위한 기초자료로 활용하고자 수행하였다. 1. NaCl 관개수 염농도, 치상온도, 들깨 품종 모든 요인이 발아에 영향을 주었으며, 관개수 염농도가 높아질수록 다유 > 들샘, 늘새미 > 들향, 소담 순으로 높은 발아율을 보였다. 2. 치상온도에 따른 들깨 발아율은 10℃에서는 다른 처리구보다 발아기간이 늦었으며, 35℃에서는 발아하지 못하였다. 3. 토양 용적밀도와 종자 파종깊이에 따른 들깨 출현 후 생존율은 1.1 g cm^-3에서는 3 cm 깊이까지, 1.3 g cm^-3 수준에서는 2 cm 깊이까지, 1.5 g cm^-3 수준에서는 1 cm 깊이까지 출현을 하였다. 4. 토양 염농도에 따른 생존율은 품종별로 유의성을 보이지 않았으며, 1.1 dS m^-1까지는 안정적으로 생존이 될 것으로 보이며, 1.9 dS m^-1 이상에서는 안정적인 출현이 힘들 것으로 판단된다.