Management Strategies to Conserve Soil and Water Qualities in the Sloping Uplands in Korea

양재이,유진희,김시주,정덕영,Yang, Jae-E.,Ryu, Jin-Hee,Kim, Si-Joo,Chung, Doug-Young Institute of Agricultural Science 2010 Korean Journal of Agricultural Science Vol.37 No.3

Soils in the sloping uplands in Korea are subject to intensive land use with high input of agrochemicals and are vulnerable to soil erosion. Development of the environmentally sound land management strategy is essential for a sustainable production system in the sloping upland. This report addresses the status of upland agriculture and the best management practices for the uplands toward the sustainable agriculture. More than 60% of Korean lands are forest and only 21% are cultivating paddy and upland. Uplands are about 7% of the total lands and about 62% of the uplands are in the slopes higher than 7%. Due to the site-specificity of the upland, many managerial and environmental problems are occurring, such as severe erosion, shallow surface soils with rocky fragments, and loadings of non-point source (NPS) contaminants into the watershed. Based on the field trials, most of the sloping uplands were classified as Suitability Class III-V and the major limiting factor was slope and rock fragments. Due to this, soils were over-applied with N fertilizer, even though N rate was the recommendation. This resulted in decreases in yield, degradation of soil quality and increases in N loading to the leachate. Various case studies drew management practices toward sustainable production systems. The suggested BMP on the managerial, vegetative, and structural options were to practice buffer strips along the edges of fields and streams, winter cover crop, contour and mulching farming, detention weir, diversion drains, grassed waterway, and slope arrangement. With these options, conservation effects such as reductions in raindrop impact, flow velocity, runoff and sediment loss, and rill and gully erosion were observed. The proper management practice is a key element of the conservation of the soil and water in the sloping upland.

한국의 경사지 밭의 토양 및 물의 보전 관리 전략

양재이(Jae E. Yang),유진희(Jin-Hee Ryu),김시주(Si-Joo Kim),정덕영(Doug-Young Chung) 충남대학교 농업과학연구소 2010 농업과학연구 Vol.37 No.3

Soils in the sloping uplands in Korea are subject to intensive land use with high input of agrochemicals and are vulnerable to soil erosion. Development of the environmentally sound land management strategy is essential for a sustainable production system in the sloping upland. This report addresses the status of upland agriculture and the best management practices for the uplands toward the sustainable agriculture. More than 60% of Korean lands are forest and only 21% are cultivating paddy and upland. Uplands are about 7% of the total lands and about 62% of the uplands are in the slopes higher than 7%. Due to the site-specificity of the upland, many managerial and environmental problems are occurring, such as severe erosion, shallow surface soils with rocky fragments, and loadings of non-point source (NPS) contaminants into the watershed. Based on the field trials, most of the sloping uplands were classified as Suitability Class Ⅲ-V and the major limiting factor was slope and rock fragments. Due to this, soils were over-applied with N fertilizer, even though N rate was the recommendation. This resulted in decreases in yield, degradation of soil quality and increases in N loading to the leachate. Various case studies drew management practices toward sustainable production systems. The suggested BMP on the managerial, vegetative, and structural options were to practice buffer strips along the edges of fields and streams, winter cover crop, contour and mulching farming, detention weir, diversion drains, grassed waterway, and slope arrangement. With these options, conservation effects such as reductions in raindrop impact, flow velocity, runoff and sediment loss, and rill and gully erosion were observed. The proper management practice is a key element of the conservation of the soil and water in the sloping upland.

난관복원술의 성공율을 높이는 제반여건의 고찰

김종덕,두재균,류철희,차경연,양재이 대한산부인과학회 1991 Obstetrics & Gynecology Science Vol.34 No.6

난관복원술의 성공율을 높이는 제반 여건을 알아보기 위하여 1982년 3월부터 1990년 2월까지 만 8년 동안 전북대학교병원 산부인과 불임크리닉에 내원하여서 미세수술을 이용한 난과복원술을 시행받은 총 116명중 6개월이상이 추적조사가 가능하였던 106명의 예를 분석하여 다음과 같은 결론을 얻었다. 1. 난관복원술후 임신성공율은 추적조사가 가능하였던 106명중 90명(84.9%)이었다. 2. 난관복원술의 동기는 자녀사망이 전체 평균 65.1로 가장 많았으나 1987년이후부터는 재혼(24.6%)과 심경의 변화(20.0%) 등이 증가하여 서구화되는 경향을 보여주고 있었다. 3. 난관복원술후 임신군의 평균연령은 28.5세, 비임신군은 30.3세이었다(p$lt;0.05). 4. 불임수술후 난관복원술까지의 평균기간은 임신군에서 35.5개월, 비임신군에서 42.4개월로 임신군에서 그 기간이 짧았다(p$lt;0.05). 5. 임신성공율에 따른 복원술후 난관 길이는 임신군 8.3 cm, 비임신군 6.8 cm이었다(p$lt;0.05). 6. 불임수술 방법에 따른 결과는 Falope ring군이 난관의 길이도 가장 길고 임신성공율도 91.7%로 가장 높았다(p$lt;0.05). 7. 난관복원술 부위에 따른 임신성공율은 팽대부-팽대부, 자궁각부-팽대부, 협부-협부, 협부-팽대부순이었다(p$lt;0.05). 8. 난관복원술후의 임신하기까지의 기간은 임신군에서 1년이내가 95.5%로 가장 높았으며 2년이후에는 1예도 없었다. 9. 난관복원술후 난관임신 발생율은 1명(0.9%)이었다. 10. 본 교실에서 고안하여 사용하고 있는 Kim`s clamp와 Doo`s microirrigator 등은 난관성형술에 있어서 아주 유용한 기구로 사료되었다. For evaluation of factors that influence the success rate of tubal reversal, 116 cases of microsurgical reversal were investigated, which were performed at the infertility clinic in the Department of Obstetrics and Gynecology, Chonbuk National University Hospital from March 1982 to February 1990. 106 cases were able to follow up more than 6 months among these 116 cases of tubal reversal patients. The results were as follows; 1. The pregnancy rate was 84.9%(90 patients) in 106 cases of tubal reversal. 2. The most common incentive was the loss of their children(75.5%), but since 1987 remarriage(24.6%) and change of marital attitude(20.0%) were increasing steadily. 3. After tubal reversal, the mean age of pregnant patients was 28.5 years and that of non-pregnant patients was 30.3 years(p$lt;0.05). 4. The time interval between the sterilization and the tubal reversal was 35.5 months in pregnancy groups, 42.4 months in non-pregnancy groups(p$lt;0.05). 5. The mean length of reconstructed tube was 8.3 cm in pregnancy patients, 6.8 cm in non-pregnant patients(p$lt;0.05). 6. Referring to the sterilization types, the pregnancy rate was higher and the length of reconstructed tube was longer in those who underwent tubal ligation with Falope ring. 7. Referring to the site of anastomosis, the pregnancy rate was higher in ampulloampullar, cornu-ampullary, isthmo-isthmic anastomosis than other group(p$lt;0.05). 8. The pregnancy rate within the first year after tubal reversal was 95.5%, but no case after 2 years was noted. 9. Postoperative tubal pregnancy developed in one case(0.9%) after tubal reversal. 10. Kim`s clamp and Doo`s microirrigator were considered to be valuable instruments in tubal surgery.

Characteristics of Phosphorus Adsorption of Acidic, Calcareous, and Plastic Film House Soils

김명숙,박성진,이창훈,윤순강,고병구,양재이 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.6

Continuous excessive application of phosphorus (P) fertilizer and manure in plastic film house soils can lead to an accumulation of P in soils. The understanding of P sorption by soils is important for fertilizer management. In this study, 9 samples were collected for acidic and calcareous soils as non-cultivated soil and plastic film house soils as cultivated soil Phosphorus sorption data of acidic soils fit the Langmuir equations, Freundlich equations in calcareous and plastic film house soils. In calcareous and plastic film house soils, the slope of isotherm adsorption changed abruptly, which could be caused P precipitation with CaCO3. The calculated Langmuir adsorption maximum (Smax) varied from 217 to 1,250, 139 to 1,429, and 714 mg kg-1 for acidic soils, calcareous soils, and plastic film house soils with low available phosphate concentration, respectively. From this result, maximum P adsorption by the Langmuir equation could be regarded as threshold of P concentration to induce the phosphate precipitation in soil. Phosphate-sorption values estimated from one-point isotherm for acidic and calcareous soils as non-cultivated soils were comparable with the Smax values calculated from the Langmuir isotherm.

Decision of Available Soil Depth Based on Physical and Hydraulic Properties of Soils for Landscape Vegetation in Incheon International Airport

정영상,이현일,정문호,이정호,김정태,양재이 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.5

Decision of available soil depth based on soil physical and hydraulic properties for the 3rd Landscape Vegetation Project in the Incheon International Airport was attempted. The soil samples were collected from the 8 sites at different depths, 0-20 and 20-60cm, for the three project fields, A, B, and C area. Physical and chemical properties including particle size distribution, organic matter content and electrical conductivity were analyzed. Hydrological properties including bulk density and water holding capacity at different water potential, -6 kPa, -10 kPa, -33 kPa, and -1500 kPa were calculated by SPAW model of Saxton and Rawls (2006), and air entry value was calculated by Campbell model (1985). Based on physical and hydrological limitation, feasibility and design criteria of soil depth for vegetation and landfill were recommended. Since the soil salinity of the soil in area A area was 19.18 dS m-1 in top soil and 22.27 dS m-1 in deep soil, respectively, landscape vegetation without amendment would not be possible on this area. Available soil depth required for vegetation was 2.51 m that would secure root zone water holding capacity, capillary fringe, and porosity. Available soil depth required for landscape vegetation of the B area soil was 1.51 m including capillary fringe 0.14 m and available depth for 10% porosity 1.35 m. The soils in this area were feasible for landscape vegetation. The soil in area C was feasible for bottom fill purpose only due to low water holding capacity.

Candida성 질염에 대한 Fluconazole의 임상적 치료 효과

오병찬,안진섭,김종덕,황수경,이희섭,차경연,양재이 대한산부인과학회 1992 Obstetrics & Gynecology Science Vol.35 No.11

저자 등은 1991년 2월 1일부터 9월 30일까지 대하, 음부소양증 및 작열감을 주소로 전북대학교병원 산부인과 외래에 내원한 환자중 질분비물 직접도말검사와 배양검사에 의해 candida가 확인된 비임신 여성 33명을 대상으로 fluconazole 1회 경구요법을 사용하여 다음과 같은 결과를 얻었다. 1. 환자의 연령분포는 28∼60세이며, 평균연령은 37.7세였고 분만횟수는 2회 군이 21례로 63.6%를 차지했다. 2. 치료후 자각증상의 소실은 작열감이 100%, 대하증이 81.5% 음부소양증이 76.9%였으며 질경소견상의 호전은 외음 및 질의 표피박라기 91.7%, 홍반이 85.0%, 분비물이 73.3%였다. 3. 진균성 질염의 원인균은 candida albicans가 29례로 88%차지하였다. 4. Sabouraud dextrose배지를 이용한 배양법에 의해 치료판정한 결과 치료 1주후의 추적검사에서 90.0%의 치료성적을 보였으며 4주후의 추적검사에서 93.1%의 치료 지속효과를 나타냈다. 5. 약제의 부작용은 자각적 증상이나 검사학적인 면에서 발견할 수 없었다. A clinical study about effectiveness of single dose Fluconazole (Diflucan) therapy in vaginal candidiasis has been carried out in 33 patients who visited Department of Obstetrics and Gynecology, Chonbuk National University Hospital form February 1st, 1991 to September 30th, 1991. Ages ranged from 28 years to 60 years with a mean of 37.7 years and the mean height was 157.1 cm and the mean body weight was 53.0kg. The majority of contanception methods (69.7%) were IUD and surgically sterilized methods. The most offending organism was Candida albicans (88%). The subjective symptoms such as discharge, pruritus, burning were ameliorated after treatment in 81.5%, 76.9% and 100%, respectively. The clinical signs such as erythema, excoriation, erosion and discharge were ameliorated after treatment in 85.0%, 91.7%, 71.4% and 73.3%, respectively. Ninety-one percent(30/33) of patients treated with the single dose were found to be cured at the 1-week follow-up, and this persisted in 93.1%(27/29) of patients to the 4-week follow up. There were no undesirable side effects in all patients during and after treatment. Fluconzole may become the orally active antifungal agents capable of treating vaginal candidiasis with single dose therapy.