• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.868-872
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• 2012

유역의 유입 및 유출은 강수에 의해 발생하며 여러 가지 기후 조건과 토지 상태의 영향을 받는다. SWAT(Soil and Water Assessment Tool) 모형은 이러한 여러 가지 복잡한 기후 조건과 토지 상태를 반영하며, 장기간 입력 자료에 따른 유출량을 산출할 수 있다. 본 연구에서는 시험유역을 안동댐 유역으로 선정하였으며, SWAT 모형을 이용하여 10년(2000년 ~ 2010년) 동안의 유출량을 산정하였고 이를 안동댐의 실측 유입량과 비교 분석하였다. ArcSWAT을 이용하여 분석하였고 입력 자료는 SWAT의 분석단위인 HRU(Hydrologic Response Unit)를 산정하기 위한 정밀 토양도 및 토지피복도와 기상입력 자료인 강우 및 최고기온, 최저기온, 습도, 풍속, 일사량 등을 사용하였다. 강우관측소는 안동댐 유역의 고선, 남회룡, 도천, 미질, 석동, 석포, 석현, 의촌, 재산, 황지를 선정하였고, 일사량관측소는 안동, 대관령, 포항을 선정하였으며, 기온, 습도, 풍속관측소는 안동, 봉화, 태백, 영주를 선정하였다. 또한 기상입력자료 중 결측값은 역거리 자승법을 이용하여 보완하였다. SWAT 모형은 유출량 계산 시 여러 가지 다양한 매개변수가 사용되며, 이러한 매개변수들의 검 보정을 통하여 실제 유역의 특성과 하천 흐름특성을 반영할 수 있다. 본 연구의 시험유역인 안동댐유역은 산림과 초지가 많은 지역이기 때문에 식물에 의해 차단되는 강우에 관한 매개변수와 지하로 침투되는 강우량에 관한 매개변수 등을 보정하여 실제 유역특성을 반영하였다. 본 연구에서는 이러한 과정을 통해 안동댐 유역의 10년 동안의 일 유출량을 산정한 결과, 홍수기의 첨두유량 및 첨두시간에는 실측자료와 약간의 차이가 있었지만 전체적으로 실측자료와 매우 유사한 유출량을 산정하였다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.25 no.1
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• pp.25-30
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• 1980

Lowland and upland rice were grown concurrently under the both lowland and upland conditions. Yield and its components such as one liter weight, 1, 000 grain weight, number of grain per panicle and number of panicle per hill were compared between varieties and between cultural conditions. Variations of rice quality were also observed about amylose content, alkali digestion value and protein content between varieties and cultural conditions. Most of lowland varieties showed high growing vigour and yielding ability in lowland culture, and they also showed high variations between the lowland and upland cultures compared to upland variety. Upland varieties were revealed higher adaptability in productivity to the lowland condition than upland condition.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.53 no.spc
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• pp.53-57
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• 2008

The experiment was carried out to select the rice cultivar adaptable to Top Rice cultivation region from 2006 to 2007 in Useong and Kyeongju, Korea. Four cultivars, recommended for high rice grain quality, were cultivated in the different region in this study. The average yield of head rice was higher in Samguangbyeo than the other three cultivars. The protein content was inversely associated with palatability (Toyo value). The protein content of Samguangbyeo was 6.2%, which was the lowest among the tested cultivars. L values in color of rice and cooked rice were not significantly different. The hardness of Samguangbyeo was lower than that of the other cultivars in texture properties of boiled rice on 4 cultivars. In conclusion,considering the rice yield and grain qualities, Samguangbyeo was selected as promising rice cultivar for Top Rice cultivation region.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.53 no.spc
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• pp.19-23
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• 2008

This study was conducted to compare the yield and grain quality as affected by rice seedling age in late transplanted rice. The rice yield was remarkably reduced in 10 day-old seedlings but those of older seedlings over than 30-day were not different. In the rice quality, as the rice seedling age younger the rate of greened and damaged rice increased, suggesting decreasing of the head rice rate. Among the physicochemical characteristics, protein content of rice grain was increased in 10 day-old seedling but amylose content was not different, consequently, the palatability was improved in older seedlings over than 30-day. From these results, it is more beneficial to machine transplant the older seedlings over than 30-day for delayed transplanting.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.51 no.spc1
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• pp.67-72
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• 2006

This experiment was carried out to identify rice varieties suitable for growing under low N-fertilization levels. Eighteen rice varieties were grown at 5.5 kg and 11 kg/10a nitrogen levels in 2004-2005 in Taegu, Korea. Several varieties like Ilmibyeo, Nampyeongbyeo, Sindongjinbyeo, Dongjin 1 and Donganbyeo yielded more than 470 kg/10a. Low N-fertilization level (5.5 kg/10a) decreased yields of Junambyeo and Donganbyeo by more than 10%. However, the decrease in yield was not significant in Surabyeo and Hwayeongbyeo compared with the 11 kg/10a N-fertilizer treatment. Improved grain quality, chemical properties and palatability was noted in some rice varieties. In terms of rice yield and grain quality, Donganbyeo, Ilmibyeo, Ilpumbyeo, Dongjin 1, Saechoocheongbyeo and Saegyehwabyeo were selected as premising rice varieties for growing under low N-fertilization levels.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.51 no.spc1
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• pp.30-34
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• 2006

The effect of N-fertilization on yield, milling characteristics and quality of Samcheonbyeo, an early maturing rice variety, was investigated in 2002 to 2004. The study was carried out in the southern alpine area of Un-bong Sub-Station, Honam Agricultural Research Institute. Higher nitrogen levels increased number of panicle and grain per unit area, but lowed ripening rate and decreased 1,000-grain weight. Higher nitrogen levels of up to 90 kg/ha also increased head rice yield. A nitrogen level of 90 kg/ha was found optimal for increasing ripening rate and head rice yield, and rice palatability.

• Korean Journal of Food Science and Technology
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• v.26 no.6
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• pp.718-725
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• 1994

The applicability of near infrared reflectance spectroscopy (NIRS) to determine moisture, protein, fat and amylose content of domestic rice was studied. The standard error of prediction (SEP) of moisture, protein, fat and amylose in polished rice was 0.014, 0.196, 0.098 and 1.427%, and those SEP of brown rice was 0.12, 1.226, 0.153 and 1.923%, respectively. It is concluded that the NIRS method allowed to detect the content of moisture and protein in rice samples with fair precision comparing conventional analysis, but the accuracy for determining amylose and fat was not acceptable.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.1
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• pp.7-14
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• 1994

This study was conducted to establish the rapid evaluation method of chemical components of rice grain on the basis of non-destructive method. A near-infrared reflectance spectroscopic(NIRS) method was utilized, for the determination of amylose, protein, magnesium, and potassium content of rice. A multiple linear regression analysis for the data obtained by standard laboratory methods and NIRS method was carried out to make a calibration. The standard error of prediction for amylose, protein, magneisum and potassium content were 0.88%, 0.28%, 12.62mg and 10.79mg, respectively. It was concluded that the NlRS method can be useful the rapid determination of amylose, protein, magnesium and potassium content instead of the existing laboratory method.

• Applied Biological Chemistry
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• v.44 no.3
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• pp.179-184
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• 2001

To investigate the effects of harvesting times on physicochemical and milling properties of rice, milling tests were performed applying laboratory milling systems. Milling and head rice yields were highest in rice harvested at the 45 days after heading at 76.49 and 94.43%, respectively. Milled rice grain harvested 45 days after heading showed the highest minimum viscosity, as shown in the amylogram curves, as well as the lowest consistency viscosity. Protein and amylose contents were highest in rice harvested at 35 days after heading, whereas the instrumental taste score was highest 45 days after heading.

• Korean Journal of Environmental Agriculture
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• v.24 no.2
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• pp.185-190
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• 2005

An experiment was conducted to know the effects of crab shell, sericite ore, and charcoal powders on the growth, yield, and grain quality of rice. After application of 110-40-57 kg/ha of $N-P_2O_5-K_2O$, 3,000 kg/ha of crab shell and charcoal powders and 5,000 kg/ha of sericite ore powder were applied and incorporated into soil before transplanting of rice seedlings. The number of tillers and panicles, leaf area index at heading stage, N concentration of plants, and protein content and chalkiness of rice grains were increased with the application of crab shell powder, while the percentage of ripened stains and head rice and Toyo taste value were decreased. The yield of milled rice and other grain appearance and chemical and physical properties of rice grains were not affected by the application of crab shell powder. The sericite ore and charcoal powders increased protein content decreased Toyo taste value, but did not affect on the growth, yield and yield components and other grain qualities.