• 한국환경농학회지
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• 제28권1호
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• pp.53-58
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• 2009

The propose of this study was to find out optimum conditions for no-tillage rice-winter cover crops cropping system. A field research was conducted to evaluate productivity and quality of rice cultivars (Dongjinbyeo and Junambybyeo) in rice-winter cover cropping systems at Doo-ryangmyeon., Sacheon, Gyeongsangnam-do, Korea from January 2005 to October 2006. The experimental soil was Juggog series (fine silty, mesic family of Fluvaquentic Eutrndepts). The rice cultivars were experimented under some different high residue farming systems, i.e. no-tillage no treatment (NTNT), no-tillage amended with rice straw (NTRS), no-tillage amended with rye (NTR), no-tillage amended with Chinese milkvetch (NTCMV), tillage no treatment (TNT), and conventional cropping system (Control). The miss-planted rate was 8.8% in 2005 and range of 10.8% to 13.3% in 2006 at NTR, and the other treatments were carried out at miss-planted rate ranging from 1.2% to 5.0%. Tiller numbers of Junambyeo, and Dongjinbyeo in both of years were the highest in Control, and decreased nearly in NTCMV, NTR, NTRS, NTNT, and TNT in that order. The lowest grain yield was observed in TNT both cultivars due to the lower tiller numbers per area, and spikelet numbers per panicle. Also, no-tillage treatments were lower grain yield than control. On the other hand, 1,000-grain weight was lowest in control due to higher tiller numbers per area, and spikelet numbers per panicle. Ripened grain ratio was a similar aspect in all treatments. The palatability score of milled rice was lowest in control while protein content of milled rice was highest in control. The NTCMV was considered an effective sustainable farming practice for rice yield and quality.

• Journal of Biosystems Engineering
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• 제3권2호
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• pp.88-99
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• 1978

In this study, rice harvesting systems suitable to Korean situations and the optimum timing of these systems were determined, respectively, based on experimentally determined factors such as filed yield and the milling quantity and quality measured at various levels of the grain moisture content at harvest. Rice varieties used for the experiment were the AKIBARE (Japonica-type) and the SUWEON 251 (high yielding TONGIL sister-line variety), The harvesting systems studied by the experimental work of this study were traditional system with both the wet material and dry-material threshing system by use of binder with both the dry-material and wet-material threshings, and system by use of combine. Grain samples were taken from final products of the paddy rice harvested from the experiment a fields for each system to measure the recovery rates of the milled rice. The results may be summarized as follows; 1. The milling recovery rate of the AKIBARE variety had highest value within the range of the grain moisture at harvest, showing from 21 to 26 percent. The head-rice recovery for the same variety was a little greater in the wet-material threshing than in the dry-material threshing , higher values of which , were 20 to 25 percent , seen within the range of grain moisture at harvest regardless of the harvesting systems tested. 2. The milling recovery of the SUWEON 251 , when tested for different harvesting systems and harvesting grain moisture, did not show a statistically significant different. In contrast , head-rice recovery for the systems operated by the wet-material threshing was much greater than that by the -material threshing. The difference of the recoveries between these systems range from 2.6 to 4.7 percent. 3. An assessment of the optimum period of -harvest timing for each of the harve\ulcornersting systems tested were made bJ.sed on (a) the maximum total milled-rise yield and (b) the percentage reduction in the total milled-rice yield due to untimely harvest operations. The optimum period determined are: 23-19% for the ATD, AC, STD, SBW, STW systems, 25-21% for the ATW ani ABW systems, and 27-18% for the ABD, SBD, and SC systems, respectively.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.123-123
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• 2022

In order to evaluate the effect of nitrogen application levels on yield and protein content of rice varieties, a field experiment was conducted at National Institute of Crop Science of Korea in 2020. Five levels(0, 3, 5, 7, and 9 kg·10a^-1) of nitrogen fertilizer were treated to six Korean rice varieties. The nitrogen uptake amount, soil nitrogen content before and after rice cultivation, milled rice yield, and protein content in head rice were analyzed. As the treatment of nitrogen fertilizer increased, the nitrogen uptake amount of plants increased significantly. However, changes in nitrogen content in the soil before and after rice cultivation were different for each cultivar. The amount of nitrogen change in the soil decreased as the amount of nitrogen application increased in the three cultivars of Haepum, Gopum, and Odae, and the other three cultivars showed the opposite trend. As a result of correlation analysis of nitrogen application amount, nitrogen uptake amount, milled rice yield, and protein content of head rice, the five varieties except for Haepum showed a high correlation between these factors. The amount of nitrogen application and nitrogen uptake of plant showed a positive correlation about the milled rice yield and protein content of head rice. In particular, the protein content in head rice appeared to be more affected by nitrogen uptake amount than nitrogen application amount. As a result of this study, the yield and protein content of rice had positive correlations with the level of nitrogen fertilizer, and had a high correlation with the nitrogen absorption of plants.

• 한국작물학회지
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• 제50권spc1호
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• pp.33-36
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• 2005

재배시기가 중산간지에서 생산된 쌀 품질에 미치는 영향을 구명하기 위하여, 중산간지에 추천된 품종(삼천벼, 상미벼, 화영벼, 주남벼)을 대상으로 5월 10일부터 6월 9일까지 10일 간격으로 4회에 걸쳐 이앙${\cdot}$재배한 3년간의 결과를 분석한 쌀품질 분석 결과를 요약하면 다음과 같다. 1. 식미치 분석결과 재배시기와 품종간의 상호작용 효과가 있어, 5월 10일 이앙재배에서는 상미벼, 화영벼, 주남벼가 삼천벼에 비해, 5월 20일 이앙재배에서는 상미벼와 주남벼가 삼천벼에 비해, 5월 30일 이앙재배에서는 상미벼와 화영벼가 삼천벼와 주남벼에 비해, 6월 9일 이앙재배에서는 상미벼와 삼천벼가 화영벼와 주남벼에 비해 식미치가 높았다. 따라서 상미벼가 4처리의 모든 이앙기에서 식미치가 높은 것으로 나타났다. 2. 아미로스 함량도 재배시기와 품종간에 상호작용 효과가 인정된바, 5월 10일과 5월 30일 이앙재배에서는 품종간의 아미로스함량에 유의차가 없었고, 5월 20일 이앙재배에서는 상미벼와 삼천벼가 주남벼보다, 6월 9일 이앙재배에서는 상미벼와 삼천벼가 화영벼와 주남벼 보다 아미로스 함량이 낮게 나타났다. 3. 단백질 함량은 이앙시기 중 6월 9일 이앙이, 품종 중에서는 주남벼가 가장 낮았다. 4. 완전미의 수량은 이앙시기 및 품종간의 유의차가 없었다. 5. 백미의 수량은 5월 20일 이앙이 5월 30일과 6월 9일 이앙재배보다 높았고, 품종간의 유의차는 없었다. 6. 본 실험 처리 중 중산간지 고품질 쌀 생산에 가장 유리한 이앙기는 5월 20일, 품종은 상미벼인 것으로 분석되었다.

• 한국작물학회지
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• 제47권3호
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• pp.254-258
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• 2002

앙식미 쌀생산을 위한 기초 정보를 얻고자 조생종인 대진벼, 중생종인 서진벼, 중만생종인 추청벼를 공시하여 농가포장 조건에서 수확시기에 따른 수량과 품질특성을 검토한 결과는 다음과 같다. 1. 백미의 단백질 함량은 대진벼, 서진벼, 추청벼 모두 수확시기가 출수후 40일에서 70일로 늦어짐에 따라 유의하게 증가하는 경향이었다. 2. 식미계에 의한 식미치는 대진벼, 서진벼, 추청벼 모두 출수후 40일에 수확시 유의하게 높았고 출수후 70일로 늦어짐에 따라 낮아지는 경향이었다. 3. 수량과 식미를 함께 고려한 수확적기는 대진벼는 출수후 40-50일, 서진벼와 추청벼는 출수후 40-60일이나 앙식미를 위하여는 3품종 모두 출수후 40-50일에 수확하여야 할 것으로 판단되었다. 4. 식미를 좋게 하는 등숙적산온도는 대진벼와 서진벼는 120$0^{\circ}C$, 추청벼는 110$0^{\circ}C$ 정도일 것으로 추정되었다. 5. 식미치는 백미의 단백질함량과는 매우 유의하고도 직선적인 부의 상관(-0.94$^{**}$ )을 나타내었고 아밀로스함량과는 매우 유의한 정상관(0.66$^{**}$ )을 나타내었다. 6. 식미치는 적산등숙온도와 매우 유의하도고 직선적인 부의 상관(-0.79$^{**}$ )을 나타내어 등숙기간중 적산온도가 낮을수록 식미치가 높았다

• 한국식품영양학회지
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• 제27권3호
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• pp.414-420
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• 2014

This study was performed to increase the yield and to reduce the processing times for the preparation to improve the productivity and quality of rice jochung, a traditional food in Korea. In order to evaluate the quality characteristics and yield of jochung, the viscosity, color value, mineral contents and the sensory evaluation were measured. Jochung is prepared from steamed rice (STR), wet-milled rice flour (WRF) and dry-milled rice flour (DRF) by processing methods of rice and reacting times (6 hours or 13 hours) of liquefaction and saccharification. There is commonly added liquefying enzyme for rice liquefaction (0.4%/10 kg rice, at $85{\sim}90^{\circ}C$ for 1 hour or 4 hours) and saccharogenic enzyme with malt (2.5% or 4.5%/10 kg rice, at $56{\sim}60^{\circ}C$ for 5 hours or 9 hours). The inner structural properties of WRF showed the more distinct shape regular structure of uncombined starch particles but the DRF closely maintained particles of rice flour observed by SEM. If processing times for liquefation and saccharification were reduced from 13 hours to 6 hours, the yield of jochungs prepared with WRF increased 8%, the DRF 7%, and the STR 3% respectively and the sensory evaluation as well as color values and overall desirability received high scores. The viscosity, color a and b values of jochung processed with WRF for 6 hours were lower than that processed for 13 hours. The viscosity and color a, b value and Ca content were decreased in the jochung processed with WRF or DRF for 6 hours, but Mg, P and K were increased than that of STR. Jochung processed by 0.4% liquefying enzyme and 2.5% malt with WRF for 6 hours will increase the yield, save manufacturing times and costs and will thereby enable cost-effective techniques.

• 한국식품과학회지
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• 제22권2호
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• pp.199-205
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• 1990

우리나라 쌀의 품종별 도정 및 품위특성을 조사하여 합리적인 시장성을 평가할 수 있는 방법을 모색하고자 일반계 쌀과 다수계 쌀의 품종별로 품위 및 도정특성을 조사 분석한 결과는 다음과 같다. 유형별 도정률은 일반계가 높고 쇄미율은 통일계가 높았으나 미강률은 큰 차이가 없었으며 벼에서 쌀까지의 도정률은 현미의 용적중, 제현율 및 현백률이 높은 품종이 요구되고 현미의 쇄립률, 심복백립률, 왕겨율, 쇄미율 및 미강률이 낮은 품종은 쌀의 품위 및 수율이 향상되었다.

• 한국작물학회지
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• 제53권3호
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• pp.326-332
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• 2008

영남평야지 조기재배시 국내 육성된 고품질 조생종 품종들의 품질에 미치는 영향을 살펴본 결과를 요약하면 아래와 같다. 1. 공시품종들의 평균 출수기는 7월 22일로 8월 하순에서 9월 상순사이에 수확이 가능한 것으로 판단되었고, 공시품종들의 평균 수당립수, 등숙율 및 수량에서 품종간 유의한 차이가 있었으며, 운광벼가 수량이 529 kg/10a로 가장 많았다. 2. 수확시기별 현미 품위를 조사한 결과 동할미 발생을 줄이고 현미 정립율을 높이기 위해서는 출수 후 40일경에 수확하는 것이 정립은 8월25일$\sim$ 9월1일 사이 수확하는 것이 가장 높았으며, 수확시기가 늦어질수록 미숙립의 발생은 감소하고 동할립의 발생은 증가하였다. 백미 완전미는 중화벼와 고운벼가 72.2%와 71.0%로 높았으나 싸라기 발생이 높았으며, 운광벼와 오대벼는 분상질의 발생이 많았다. 3. 운광벼와 오대벼는 백미 단백질 함량은 6.4%로 낮았으며, 식미관능검정의 총평이 각0.6 및 0.5로 밥맛이 양호하였다.

• Plant Resources
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• 제5권2호
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• pp.104-108
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• 2002

In order to obtain basic information for selecting early maturing rice varieties which is suitable for early cropping before Alisma plantago in the southern part of Korea. Six rice varieties were grown from May to August in 2002 at Youngjeon Experiment Field, Sunchon and yield components and yield of plants were investingated. Early maturing rice cv. Grubyeo showed higher rough rice yield than any other varieties used in the experiment. It showed high yield components, such as culm length, panicle length, number of panicles per plant, number of spikelets per panicle and ratio of ripened grains. Therefore, it was concluded that Grubyeo was the most suitable variety with high yield for the cultivation before growing of Alisma plantago at the southern part of Korea. The heritability of culm length number of spikelets per panicle and rough rice yield were high and that of panicle length number of panicle per plant, ratio of ripened grain and 1,000 grain wt. of milled rice were low. According to the result of path coefficient analysis, characters highly correlated with rough rice yield showed large direct effects on rough rice yield.

• 한국식품조리과학회지
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• 제10권2호
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• pp.142-145
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• 1994

출수시일별에 따른 일반성분, 수율 및 경도 조사 결과 출수 후 33일 이후부터는 큰 차이가 없었다. 도정 후 쌀가루의 수율은 출수시일이 증가함에 따라 증가하였으며 ,출수 후 45일 이후의 벼에서 제조한 쌀가루만 양호한 상태였다. 곡립경도 연화실첩 결과 a-amylase 용액이 경도가 가장 낮았으며 4시간 침지가 최적인 것으로 나타났다. 따라서, 출수 후 45일 지난 벼는 제분 가능성이 있으며 효소용액 처리 후 곡립경도를 감소시켜 미세한 입자를 가진 쌀가루를 제조할 수 있다.