서남해안(西南海岸) 간석지토양(干潟地土壤)의 특성(特性)에 관(關)한 조사연구(調査硏究)

심재환,정정화,안열,Shim, Jae-Hwan,Jung, Jung-Hwa,An, Yeul 한국토양비료학회 1989 한국토양비료학회지 Vol.22 No.4

서남해안(西南海岸)에 분포(分布)되어 있는 간척가능지(干拓可能地) 442,000ha에 대(對)한 토성별(土性別) 분포현황(分布現況)과 물리화학적(物理化學的) 특성(特性)을 조사(調査) 분석(分析)하고 토양(土壤) 성숙(成熟)에 따라 일어나는 상상(像想) 침하량(沈下量)에 대(對)하여 연구(硏究)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 기존간척지(旣存干拓地) 257,000ha의 토성별(土性別) 분포면적(分布面積)은 미사식양질(微砂埴壤質) 53.0%, 미사사양질(微砂砂壤質) 36.0%, 사질(砂質) 6.0%, 사양질(砂壤質) 5.0% 이다. 2. 간척가능지(干拓可能地) 442,000ha의 토성별(土性別) 분포면적(分布面積)은 미사식양질(微砂埴壤質) 51.0%, 사질(砂質) 20.0%, 사양질(砂壤質) 15.0%, 징사식양질(徵砂埴壤質) 14.0%이며 지역별(地域別) 분포(分布)는 경기(京機)와 전남(全南)은 미사질계토양(微砂質系土壤), 전북(全北)은 조립질토양(粗粒質土壤), 충남지역(忠南地域)은 각종토성(各種土性)이 고르게 분포(分布)되어 있다. 3. 간척가능지토양(干拓可能地土壤)은 염도(鹽度)(EC) 46~51mmhos/cm, E.S.P 25~60%, pH 7.5~8.0으로 U.S.Salinity Lab의 염류토양(鹽類土壤) 분류(分類)로 함염(含鹽)Alkali토와(土) 유사(類似)하다. 4. 간척가능지(干拓可能地)를 농경지(農耕地)로 개발(開發)할때 예상(豫想)되는 침하량(沈下量)은 미사질양토(微砂質壤土) 18.0%, 치사질식양토(徵砂質埴壤土) 21.0%이다. The soil texture and the physico-chemical characteristics of 442,000ha reclaimable tide land in the south-western of korean peninsular were analysed. The subsidence which may occur as the soil ripened was studied. The results were as follows : 1. Among the 257,000ha of existing reclaimed tidal land 53.0% was tine silty soil and 36.0% coarse silty, 6.0% coarse loamy and 5.0% sandy soils, respectively. 2. Out of the total 442,000ha of reclaimable tidal land, 51.0% was coarse silty soil, and 20% sandy, 15.0% coarse loamy and 14.0% fine silty textural family, respectively. The coarse silty deposits were mainly distributed in the Gyeong gi and Jeonnam coast, while the coarse deposits(Coarse Loamy-sandy) exist in the Jeonbuk coastal area, but in the Chungnam areas there were various textural grades. 3. Reclaimable tidal Land in the south-western part of the peninsular was Classified into saline and alkaline soil. Electric Conductivity in saturation extract was extremely high that was 46~51 mmhos/cm, E.S.P was more than 25% and pH was ranged around 7.5~8.0 4. Reclaimed to cultivated field the subsidence reclaimable tide land to be expected when was about 18% in Soil and 21% in Sicl soils calculated down to 1.25m of the profile.

Estimation of Conversion Factors for Electrical Conductivities Measured by Saturation-Paste and 1:5 Water Extraction

이승헌,홍병덕,안열,노희명,Lee, Seung-Heon,Hong, Byeong-Deok,An, Yeul,Ro, Hee-Myong Korean Society of Soil Science and Fertilizer 2003 한국토양비료학회지 Vol.36 No.4

토양전기전도도는 토양의 염분농도의 주요 지표인데 표준방법으로 토양포화침출액의 전기전도도를 측정하여 사용하고 있다. 그러나 많은 토양 염분농도 관련 자료들이 토양과 물의 1:5 희석법으로 측정하고 있으며 환산 계수를 곱하여 염분%로도 제시되고 있다. 따라서 포화침출액법과 1:5 희석법으로 측정하여 제시되어 있는 자료 및 염분%로 표시되어 있는 자료들을 상호비교하는 데 있어서 필요한 환산계수를 도출하였다. 우리나라 서남해안에 조성된 9개 간척지에서 토양시료 90점을 채취 분석하여 2가지 토성조건과 5수준의 염분농도 조건별로 환산계수를 산출하였다. 포화침출액법과 1:5 희석법간의 환산 회귀식은 미사 함량 50%이상인 토양의 경우 DF1:5=1.3624ln(ECe)+5.1386 ($r^2=0.37^{***}$) 이었고 미사 함량이 50%이하인 토양의 경우 DF1:5=1.9505ln(ECe)+5.3679 ($r^2=0.66^{***}$) 이었으며, 토성을 고려하지 않은 전체 토양의 경우에는 DF1:5=1.4001ln(ECe)+5.4865 ($r^2=0.51^{***}$) 이었다. 이들 관계식을 토대로 하여 EC1:5와 염분%로 제시된 자료들을 ECe로 환산할 수 있는 계수 DF1:5와 DF%를 산출하여 제시하였다. Electrical conductivity (EC) is a major indicator of soil salinity. Measurement of EC in saturation-paste extract of soil (ECe) is a standard way to evaluate soil salinity. However, many of the data on soil salinity have been obtained by measuring the EC of 1:5 soil-water extract (EC1:5) or salt percentage which is calculated from EC1:5 by multiplying a conversion factor. We analyzed 90 soil samples collected from 9 reclaimed tidelands in Korea, and derived relationships between ECe and dilution factors (DF1:5) which can convert EC1:5 to ECe in 2 soil textural groups at 5 salinity levels. Regression equations between ECe and DF1:5 were DF1:5 = 1.3624In(ECe) + 5.1386($r^2=0.37^{***}$) for soils of more than 50% silt content, DF1:5 = 1.9505In(ECe) + 5.3679($r^2=0.66^{***}$) for soils of less than 50% silt content. And the relationship for all soils investigated was DF1:5 = 1.4001In(ECe) + 5.4865($r^2=0.51^{***}$). From the relationships, conversion factors for calculation of ECe from EC1:5 of salt percentage data were estimated for soils of different textures and salinity levels.

휴경논에서의 수질관리 연구

김형중,김선주,김필식,안열,양용석,Kim Hyung-Jong,Kim Sun-Joo,Kim Phil-Shik,An Yeul,Yang Yong-Suck 한국농공학회 2006 한국농공학회논문집 Vol.48 No.2

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.

유휴농지를 이용한 수질관리방안 연구

김형중 ( Kim Hyung-joong ),안열 ( An Yeul ),김선주 ( Kim Sun-joo ),김필식 ( Kim Phil-shik ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-

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.

우탁 (于拓)에 따른 우석지토양 (于潟地土壤)의 물리적성숙에 관한 조사연구

엄대익(Dae Ick Uhm),안열(Yeul An) 전북대학교 농업과학기술연구소 1990 농업생명과학연구 Vol.21 No.-

관개용수 pH가 벼 생육, 수량, 미질에 미치는 영향(I)

최선화 ( Choi Sun Hwa ),김호일 ( Kim Ho Il ),안열 ( An Yeul ),허유만 ( Huh Yoo Man ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-

This study was carried out to investigate the effects of the pH of irrigation water on the growth, yield, and grain quality of rice. It acquire fundamental know ledges to set up irrigation water quality standards. The pot experiment was conducted with 5 treatments using irrigation waters with various pH values(control, 4, 6, 8, 10) and replicated four times with randomized block design. The results of this study showed that the uptake of N, P, and K, Ripened grain ratio and yield of rice tended to be reduced at the irrigation water of pH 4 and pH 10. P uptake, Ripened grain ratio and yield of rice at pH 4 water were significantly lower than the control. K uptake at pH 10 water was significantly lower than the control. Plant height, SPAD value and protein content of rice were not affected by the pH of irrigation water.

Estimation of Conversion Factors for Electrical Conductivities Measured by Saturation-Paste and 1:5 Water Extraction

Seung-Heon Lee(이승헌),Byeong-Deok Hong(홍병덕),Yeul An(안열),Hee-Myong Ro(노희명) 한국토양비료학회 2003 한국토양비료학회지 Vol.36 No.4

두 가지 토양 염도 측정법간의 환산계수 추정

이승헌 ( Lee Seung-heon ),홍병덕 ( Hong Byeong-deok ),안열 ( An Yeul ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-

The electrical conductivity, EC is a major indicator of soil salinity. Measuring EC of saturation-paste extract of soil, ECe, is the standard way to evaluate soil salinity. However much of the data on soil salinity have been obtained by measuring the EC of the 1:5 soil-to-water extract, EC(1:5) or salts contents(%) which multiplied by conversion factor. And, thus we attempted to collect and analysis 90 soil samples at 9 reclaimed tidelands in Korea and to derive a relationship between ECe and dilution factor at ECe and EC(1:5), DF_1:5 of 3 soil textural conditions and 6 salinity conditions. Regression equations between ECe and DF_1:5 were obtained ECe=1.4701ln(DF_1:5)+5.0974(r²=0.97**) in case of more than 50% silt contents, ECe=2.1399ln(DF_1:5)+5.3462 (r²=0.99***) in case of below 50% silt contents, and ECe=1.5927ln(DF_1:5)+5.2486 (r²=0.98***) in all cases, and then we suggested the DF_1:5 and DF_% of 3 soil textural conditions and 6 salinity conditions.

西南海岸 干潟地土壤의 特成에 關한 調査硏究

沈載環(Jae-Hwan Shim),丁正化(Jung-Hwa Jung),安烈(Yeul An) 한국토양비료학회 1989 한국토양비료학회지 Vol.22 No.4

干拓에 따른 干潟地土壤의 物理的成熟에 관한 調査硏究

嚴大翼,安烈 전북대학교 농업과학기술연구소 1990 農大論文集 Vol.21 No.-

The area of reclaimable tideland distributed in southwestern Korea peninsula is approximatly 442.000ha, The study was made to figure out Changing process of soil properties after reclamation. And the result of the study for silt clay Loam ( SiCL) soil are following as physical reclamation maturity was developed. 1. In the topographical distribution of reclaimable tideland, subtidal zone was mainly distributed in the Jeonbuk area, Intertidal zone in the Jeonnam area, and saltmash in the Gyeonggj area. 2. The Gyeonggj and Jeonnam area showed coarse silty soil, in the Jeonbuk area Coarse loamy - sandy, and in the Chungnam Various soil types. 3. n -factor· was 1-4~2.0(virturally unmaturity) which proportional to the submersion time of the area. While n-factor was above 2.0(unmaturity) where the submersion time is longer. n-factor was affected by clay and water content. 4. As reclamation maturity was developed, soil structure changed in progressive sequence from puddle→massive→subangular blocky→prismatic structure. 5. Coneresistance was increased as water contents decreased at the 1st year of the study it shows 1.1 kg/cm2, and at the 3th year the it increased up to 2.4kg/cm2. 6. Vertical penetration depth of, surface crack was reduced as the depth of soil was thicker while horizontal penetration was increased. 7. Anticipated desalinigation period was calculated by vandal Molen equation for safe rice farming. It will be seven years for silt in Gyonggi province. eight years for fine silt Loam in Chungnam, three years for sandy soil in Jeonbuk and ten years for silt clay Loam in Jeonnam province. 8. Test result of water holding capacity were following. Available water contents was 3.6% for Sandy soil, 9.3% for the Loam soil, 17.4% for the Silt Loam soil and, 23.3% for Siltclay loam were evaluated and it was in-creased according to the amounts of clay, silt and organic matter contents.