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배수불량 간척지에서 배수처리가 제염 및 작물생육에 미치는 영향
배희수,이수환,황재복,박홍규,이건휘,이경보,이교석,이동성,홍병덕,이자현,정덕영 한국국제농업개발학회 2016 韓國國際農業開發學會誌 Vol.28 No.4
To determine the effect of soil salinity and crop response according to drainage methods, a field experiment was conducted in reclaimed tidal flat land adjacent to Yeongsangang located at Sanyimyon Haenamgun Jeonnam province for three years from 2012 to 2014. Three drainage methods, subsurface drainage (SD), 30 cm open ditch drainage (OD30) and 60cm open ditch drainage (OD60) tested on silt loam soil. In SD and ND, soil salinity were lower than OD30 and OD60 but there was no significant soil EC to the depth of open ditch. SD had a little effect in lowering ground water table. Waterlogging intensity in SEW30 values during the growing season was the lowest in SD 297 compared with the OD30 855, ND 1,420 and OD60 1,553 cm-day. From the above results, subsurface drainage system control soil salinity and waterlogging. Also, the open ditch drainage had an effect on drainage improvement but there was no significant effect on desalinization. So drainage and soil reclamation were essentially needed to stable upland crop cultivation at the reclaimed tidal flat land.
Relationship between Soil Chemical Properties and Algae Growth at Rice Paddy Field
배희수,안성현,황재복,장현수,윤종택,김욱한,박태선,배범수 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.4
Influences of various soil chemical properties on the algae growth (Chl-a concentration) at the paddy fieldwere statistically analyzed using soil and water samples collected from 2016 to 2018 in June. As a result of correlation analysis between soil chemical properties and Chl-a concentration, significantly positive relationships were observed in pH, EC and SiO2. To identify the key soil chemistry variables and predict Chl-a concentration, factor analysis was done and three principal components (PCs) with eigenvalues > 1 were found, which accounting for 60.9% of the original variance. The PC1 included Mg 2+ , Ca 2+ and Avali.-P. The PC2 included pH, Na + , K + , and Avail.-SiO2. PC3 included OM and T-N. According to the result of linear regression analysis based on the factors by factor analysis, the total explanation amount was 18.0% and only PC3 had an significant influence on the decrease of Chl-a concentration. These result will be used for soil management to prevent algae blooms at rice paddy field.
Managing Soil Organic Matter and Salinity by Crop Cultivation in Saemangeum Reclaimed Tidal Land
배희수,장현수,황재복,박태선,이교석,이동성,정덕영 한국토양비료학회 2018 한국토양비료학회지 Vol.51 No.1
This study was to evaluate the effect of organic amendments incorporation on soil properties and plant growthunder two different soil salinity levels and various cultivated crops at Saemangeum reclaimed tidal land forthree years from 2012 to 2014. The soil texture of the experimental site was sandy loam. Four different crops,sesbania (Sesbania grandiflora), sorghum-sudangrass hybrid (Sorghum bicolor-Sorghum sudanense), rice(Oryza sativa L.) and barley (Hordeum vulgare) were cultivated at low (< 1 dS m-1) and high (> 4 dS m-1) soilsalinity levels. The soil salinity was significantly lowered at the rice cultivation site compared to continuousupland crops cultivation site in high soil salinity level. But the soil salinity was increased as cultivatingsesbania coutinuously in low soil salinity level. The soil organic matter content was increased with theincorporation of straw at the continuous site of rice and barley, and the average of soil organic matter wasincreased by 0.9 g kg-1 per year which was effective in soil aggregate formation. The highest biomass yieldplot was found in barley (high salinity level) and sesbania (low salinity level) cultivation site, respectively. Our research indicates that rice cultivation in paddy field with high salinity level was effective in lowering soilsalinity and sesbania cultivation was useful to biomass production at upland with low salinity. In conclusion,soil salinity and organic matter content should be considered for multiple land use in newly reclaimed tidalland.
새만금간척지에서 점적관수량이 토양염농도와 녹색꽃양배추의 생육에 미치는 영향
배희수(Bae Huisu),황재복(Hwang Jaebok),김학신(Kim Haksin),구본일(Gu Bonil),최인배(Choi Inbae),박태선(Park Taeseon),박홍규(Park Hongkyu),이수환(Lee Suhwan),오양열(Oh Yangyeol),이상훈(Lee Sanghun),이건휘(Lee Geonhwi) (사)한국생물환경조절학회 2015 생물환경조절학회지 Vol.24 No.4
본 연구는 새만금 간척지에서 비닐하우스 작물 재배 가능성 검토를 위해 녹색꽃양배추를 대상으로 일일 관수량을 달리하여 관수량에 따른 토양 염농도 및 생육특성 등을 조사하여 관수량에 의한 재염화 억제효과를 알아보고자 수행하였다. 수확기의 표토의 평균 토양 EC 는 1.5 및 3.0mm·day<SUP>-1</SUP> 처리구에서 각각 10.9 및 11.5dS·m<SUP>-1</SUP>였으며 6.0mm·day<SUP>-1</SUP> 처리구에서 5.1dS·m<SUP>-1</SUP>로 1.5 및 3.0mm·day<SUP>-1</SUP> 처리구보다 52~56% 낮게 나타나 점적관수량에 따른 제염효과를 확인할 수 있었다. 화뢰의 무게는 6.0mm·day<SUP>-1</SUP> 처리구에서 주당 371.3g으로 1.5 및 3.0mm·day<SUP>-1</SUP> 처리구의 60.9g 및 129.1g보다 높은 값을 나타냈다. 50%의 수량감소를 보이는 토양 EC는 7.6dS·m<SUP>-1</SUP>였으며 점적관수에 의한 토양 제염효과는 6.0mm·day<SUP>-1</SUP> 처리에서 30~40cm 깊이까지 나타났다. 따라서 새만금간척지에서 녹색꽃양배추 재배시 점적관수에 의한 토양 재염화 억제를 위해서는 6.0mm·day<SUP>-1</SUP> 수준의 관수량으로 총 422mm의 물량이 필요할 것으로 예측된다. 그러나 염류의 이동은 토양 이화학적 특성 및 계절적 요인 등 여러 가지 환경요인에 영향을 받으므로 간척지 비닐하우스에서 점적관수에 따른 염류의 이동특성에 관한 추가적인 연구가 필요할 것으로 판단된다. The objective of this study was to investigate the effect of drip irrigation level on soil salinity and growth of broccoli (Brassica oleracea L. var. italica) at the ‘Saemangeum Reclaimed Tidal Land’ from April to June, 2015. Drip irrigation was conducted at 1.5, 3.0 and 6.0mm·day<SUP>-1</SUP> level for reduction of resalinization in the plastic vinyl house using 10cm spacing drip irrigation tape. At harvesting stage, the average EC of surface soil was 10.9dS·m<SUP>-1</SUP> for 1.5mm·day<SUP>-1</SUP>, 11.5dS·m<SUP>-1</SUP> for 3.0mm·day<SUP>-1</SUP> and 5.1dS·m<SUP>-1</SUP> for 6.0mm·day<SUP>-1</SUP> and was significantly reduced by 52~56% in 6.0mm·day<SUP>-1</SUP> treated plot compared to those in 1.5 and 3.0mm·day<SUP>-1</SUP> plots. The fresh bud weights of 1.5, 3.0 and 6.0mm·day<SUP>-1</SUP> treatment plots were 60.9, 129.1 and 371.3g·plant<SUP>-1</SUP>, respectively. The estimated soil EC for 50% yield reduction was 7.6dS·m<SUP>-1</SUP> and the desalinization depth by drip irrigation was 30~40cm in soil profile. The total amount of drip irrigation water was estimated to be 422mm and the daily drip irrigation level was 6.0mm·day<SUP>-1</SUP> for the prevention of resalinization during the broccoli growing period at the ‘Saemangeum Reclaimed Tidal Land’. Our results suggested that drip irrigation shows effectiveness on the lowering the soil salinity according to the drip irrigation quantity but it needs more research on this study because dynamics of salts in soil can vary with many factors such as soil physico-chemical properties and seasonal climate.