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새만금 간척지에서 토양특성별 제염 및 재염화특성에 관한 연구
송재도 ( Jae Do Song ),손재권 ( Jae Gwon Son ),최진규 ( Jin Kyu Choi ),장태일 ( Tae Il Jang ),조재영 ( Jae Young Cho ),한평희 ( Pyeong Hee Han ),우혜진 ( Hye Jin Woo ) 한국농공학회 2014 한국농공학회 학술대회초록집 Vol.2014 No.-
새만금 간척사업은 1991년 11월 방조제공사가 착공되었으며, 2006년 4월 방조제 끝물막이 공사로 그 모습이 드러나게 되었다(농어촌공사, 2000). 본 사업을 통해 간척 토지 면적 28,300 ha와 담수호 면적 11,800 ha를 조성하여 전체 개발면적 40,100 ha를 계획하고 있다(농어촌공사, 1998). 새만금 간척지중 농업용지에 대한 내부개발 공사는 새만금 첨단농업시험단지, 농어업회사 부지 등이 포함된 농업용지 5공구를 대상으로 이루어지고 있는 상황이다. 그러나, 간척지 내부개발공사가 완료된 이후 본격적인 영농작업을 실시할 경우 간척지 토양 내 함유된 염분에 대한 종합적인 관리대책이 필요할 것으로 여겨진다. 이에 본 연구에서는 현재 공사가 진행중에 있는 새만금 농업용지5공구지역의 대표적인 토양이라 할 수 있는 미사질양토, 사양토, 양질사토 토양을 대상으로 제염 및 재염화에 대한 라이시미터시험을 실시하였다. 초기 제염시 미사질양토 토양은 지속적인 용수를 공급하였음에도 불구하고 토양침출이 이루어지지 않고 있었으나, 사양토와 양질사토 토양에서는 초기 전기전도도(EC)가 각각 6.9dS/m, 9.3dS/m였다가 초기 제염용수 300mm공급시 토양심도 60cm까지 2dS/m수준으로 제염이 이루어지고 있었다. 또한, 초기 제염이후 무관개, 간단관개, 상시관개 등 관개방식을 달리하여 적용한 결과 무관개시에는 사양토, 미사질양토, 양질사토 순으로 토양염분 상승이 이루어졌고, 간단관개나 상시관개에서는 재염화에 대한 방지효과가 있었다. 따라서, 향후 새만금 간척지에서 작물재배시에는 작물생육특성과 더불어 간척지 토양특성을 감안하여 제염방식이나 관개방식 적용이 필요할 것으로 판단된다.
손재권 ( Son Jae Gwon ),구자웅 ( Cho Jae Young ),최진규 ( Koo Ja Woong ),조재영 ( Choi Jin Kyu ),송재도 ( Song Jae Do ),김영주 ( Kim Young Ju ),황선아 ( Hwang Seon Ah ),이강수 ( Lee Kang Soo ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
The research was conducted to analyzed the sediments of Dongjin watersheds in reclaimed tideland of Saemangeum under consideration of physico-chemical properties in order to suggest for basic data the reasonable management of the highly salinized reclaimed tideland and to secure the way to desalinize. The distribution of soil texture in sediments was mainly sandy loam and loamy sand, as 58.3% of sandy loam, 38.2% of loamy sand, and 3.5% of sand, respectively. The saturation was in the range of 33.4 ~ 58.5% and the average of DJA, DJB, and DJC was 45.6, 41.1, and 40.5%, respectively. And the overall average was 41.9%. The EC was entirely in the range of 17.2 ~ 39.8 dS/m and the average of DJA, DJB, and DJC was 25.7, 30.2 and 33.1 dS/m, respectively. The pH was in the range of 6.40 ~ 8.57 and the average of DJA, DJB, and DJC was 7.05, 7.15 and 7.37, respectively. The CEC of sediment was in the range of 5.25 ~ 11.95 cmol/kg and the average of DJA, DJB, and DJC was 8.33, 7.64 and 7.45 cmol/kg, respectively. The concentration of OM was in the range of 0.14 ~ 6.55% and the average of DJA, DJB, and DJC was 2.21, 0.92 and 1.17%, respectively.
손재권 ( Son Jae-gwon ),최진규 ( Choi Jin-kyu ),구자웅 ( Koo Ja-woong ),송재도 ( Song Jae-do ),김영주 ( Kim Young Joo ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-
This study was performed in order to analyze the changes of electrical conductivity during the growing period in Saemangum reclaimed tidal lands soils. According to USDA Salinity Laboratory classification system of salt affected soils, the reclaimed tidal land soils used in this study were saline-sodic soils. As the results obtained from analying the changes of electrical conductivity(EC) during the growing period in reclaimed tidal land soils, EC of irrigation water and soils were no difference among the fertilization quanity, fertilization method and fertilization times.
손재권 ( Son Jae Gwon ),최진규 ( Choe Jin Gyu ) 한국농촌계획학회 2003 농촌계획 Vol.9 No.1
This study was carried out to provide the basic information for the water quality management of the Sumjin River Basin. The Chooryeongchon stream watershed was selected and the parameters representing water were investigated from May 1999 to September 2002, periodically. Yearly mean runoff ratio to the rainfall amount of the watershed was analysed as 26.6~58.8%. Temporal variation of water quality constituents such as water temperature, pH, EC, total nitrogen, total phosphorus were analysed. The result showed that pH ranged 5.7~7.7, EC 54~167 μS/cm, COD 0.8~18.1mg/L, respectively. Total-N and total-P concentration ranged from 0.89 to 5.19 mg/L and from 0.0004 to 0.030 mg/L, respectively. The relationships between runoff and mass load were derived and showed high linear relationships.
간척지의 토지이용 현상과 문제점 파악 및 발전방향 - 충남, 전북, 전남 지역 지자체 및 한국농어촌공사 지사 대상 설문조사 -
손재권 ( Son Jae-gwon ),정찬희 ( Jeong Chan-hee ),이동호 ( Lee Dong-ho ),고승환 ( Go Seung-hwan ),송재도 ( Song Jae-do ),이기성 ( Lee Gi-sung ),박종화 ( Park Jong-hwa ) 한국농촌계획학회 2020 농촌계획 Vol.26 No.3
The purpose of this study was to determine the problems of reclamation sites and the prospects of farming in reclamation areas seen by local governments and the KRC branches in Chungnam, Jeonbuk, and Jeonnam provinces. A mail survey method was used. The survey items were set for 15 items regarding the reclamation site situation, problems, and prospects. Seventy-five copies of the questionnaire were distributed to the local government, and 90 copies were sent to the KRC 165 copies in total. In response to the questionnaire, 72 recipients of the local governments responded, showing a 96% response rate, and 74 (82.2%) of the KRC responded. The overall response rate was 88.5%. The opinions on the rental method of the reclaimed land were found to differ according to the geographic conditions of the reclaimed land, the construction conditions, and the time. Regarding the survey on crops preferred for cultivation, rice was highest in both local governments (61%) and KRC (46%). When cultivating field crops in reclaimed land, 56% of local governments and 57% of KRC considered salinity a s t he most problematic or resolvable problem. Regarding growing other field crops in reclaimed land, salt and drainage problems were recognized as the biggest obstacles in all reclaimed land. As for technologies that need to be applied first for the future agriculture of reclamation land, KRC responded with automatic water management (48%) and local governments responded with unmanned agricultural machinery (32%). In order to diversify the land use in the reclamation area, it is necessary to reduce salt damage and ensure systematic maintenance, employing, for example, automatic water management facilities and drainage improvement methods. The results of this study can set a land use direction for reclamation sites and provide useful information for use in various forms.
손재권(Jae-Gwon Son),조재영(Jae-Young Cho) 한국토양비료학회 2009 한국토양비료학회지 Vol.42 No.3
신선유기물 (이탈리안 라이그라스), 신선유기물 +부산물비료 그리고 부산물비료 처리 후 3년 동안 토양입단 발달상태를 조사한 결과, 토양별로는 모래 함량이 상대적으로 높은 새만금 간척지 토양 보다는미사와 점토함량이 높은 고흥 간척지 토양에서의 입단형성이 더 양호한 것으로 나타났다. 유기물 자원처리별로는 고흥 간척지 토양에서는 유의성 있는 차이가 나타나지 않았으나 (P<0.05), 새만금 간척지 토양에서는 녹비 형태의 신선 유기물 즉, 이탈리안 라이그라스를 처리한 시험구에서 가장 입단화도가 높게 나타났다.유기물 종류별로는 이탈리안 라이그라스와 같은 신 선 유기물을 단독 처리한 시험구에서 토양 입단의 중량평균직경이 가장 크게 나타났다. 간척지 토양의 물리성 및 토양구조 개선을 위한 유기물 처리시 신선유기물의 처리가 바람직하며, 불가피할 경우 일반 유기질/부산물비료의 단독처리보다는 신선유기물과 혼합하여 처리하는 것이 타당한 것으로 조사되었다. It is generally accepted that organic materials are a significant factor on the soil aggregation formation but little information exists on how the formation and stabilization of aggregates in reclaimed tidelands. In this work, the effects of organic materials on the soil aggregate formation in reclaimed tidelands were determined. The soil was treated with 5 cm-size chopped fresh italian ryegrass residues (fresh organic material), commercial livestock compost with swine manure and sawdust (by product fertilizer), and fresh organic material + by product fertilizer (1 : 1 w/w) after ploughing at 20 cm soil depth. The three organic materials applied 2,000 kg 10 a<SUP>-1</SUP> every year. Water stable aggregate was estimated by wet-sieving method. Three years after the beginning of the experiment, water stable aggregate rate and MWD (mean weight diameter) were higher fresh organic material treatment than two other treatments. For improvement of physical property and structure of soil in reclaimed tidelands, fresh organic material treatment was more suitable than two other treatments.
손재권 ( Son Jae-gwon ),구자웅 ( Koo Ja-woong ),최진규 ( Choi Jin-kyu ),조재영 ( Cho Jae-young ),송재도 ( Song Jae-do ),김영주 ( Kim Young-ju ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
A aggregate size distribution is an important in successful crop production in reclaimed tidelands. The aggregate size distribution for this study were determined of 0.1mm, 0.5mm, 1.0mm, and 2.0mm by wet sieving method. Agricultural activity, period of reclamation showed significant effects on aggregate size distribution in reclaimed tidelands. The percentage of < 2mm aggregates for SMG, GHD, and SM reclaimed tidelands were ranged 8.9, 36.7, and 38.0%, respectively. The percentage of >0.1mm aggregates for SMG, GHD, and SM reclaimed tidelands were ranged 9.0, 26.0, and 48.9%, respectively.