• 한국작물학회지
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• 제50권spc1호
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• pp.51-55
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• 2005

남부 산간고랭지인 운봉에서 고품질 쌀 생산을 위한 재배기술을 확립하고자 $2002\~2004$년에 삼천벼와 상미벼를 공시하여 적정 이앙시기를 검토하였는데, 이들 시험결과를 요약하면 다음과 같다. 1. 단위면적당 영화수는 생태형에 관계없이 이앙시기가 빠를수록 많은 경향이었다. 2. 등숙비율은 삼천벼는 5월 21일 이앙에서 높았으나 상미벼는 조기 이앙할수록 높았다. 3. 완전미 수량은 삼천벼는 5월 21일 이앙에서, 상미벼는 5월 1일 이앙에서 가장 많았다. 4.완전미 수량, 등숙비율, 미질 등을 고려한 이앙적기는 조생종은 5월 21일, 준조생종은 5월 1일로 판단된다.

• 농업생명과학연구
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• 제53권2호
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• pp.87-95
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• 2019

경남의 벼농사 대표 지대인 남부 중간지와 남부 평야지에서 질소 감비(7 kg/10 a)에 의한 고품질 쌀 생산을 위한 품종을 선발하고자 본 연구가 수행되었다. 7품종의 벼를 중간지에서 재배하였고 평야지에서는 10품종의 벼를 재배하여 평가하였다. 중간지에서 완전립의 수량은 보라미(526 kg/10 a)를 제외하고 대부분의 품종이 대조품종인 추청벼(533 kg/10 a)에 비해 높게 나타났다. 반면, 보라미와 고품벼, 온누리는 완전립률이 다른 품종에 비해 낮게 나타났다. 더욱이, 보라미와 대조품종인 추청벼는 도복지수가 다른 품종에 비해 높게 나타났다. 도정된 대조품종인 추청벼의 단백질 함량은 6.1%로 나타났고, 다른 품종들은 대조품종에 비해 비슷하거나 낮게 나타났다. 평야지에서는 남평벼(527 kg/10 a)만이 완전립 수량에서 대조품종인 일미벼(503 kg/10 a)에 비해 높게 나타났다. 그리고 호품벼, 신동진 그리고 칠보벼는 다른 품종들에 비해 완전립 비율이 더 낮게 나타났다. 그러나 호품벼(5.9%)와 진수미(6.0%), 신동진(5.9%), 칠보벼(6.0%), 황금노들(5.8%), 호평벼(6.0%)는 대조품종 일미벼(6.1%)에 비해 단백질 함량이 더 낮게 나타났다. 아밀로오스 함량, 백도, 식미 등은 두 지역에서 품종들 간 유의적 차이는 없었다. 결론적으로 완전립 비율, 완전립 수량, 단백질 함량, 도복 저항성, 등숙률 그리고 식미 등을 고려하면 중간지에서는 풍미1호, 새누리, 칠보벼가 평야지에서는 진수미, 황금노들이 고품질의 쌀을 생산하는데 적합한 품종으로 판단된다.

• Journal of Biosystems Engineering
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• 제32권5호
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• pp.332-338
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• 2007

Yield mapping is necessary for precision farming. An on-site rice weighing system for a head-feed combine was developed to measure the total weight of rice grain harvested while the combine was operated. A load cell system was used to monitor rice weights accumulated into the combine grain tank using a load cell. This method gave cumulative grain weight readings as a function of time. The system consisted of a load cell, two supporting brackets, and a computer-based data acquisition system. The weights measured with the system from two fields were compared with those obtained with a commercially available electronic balance. The response of the load cell to varying grain weights was linearly modeled, showing a coefficient of determination of 0.998 and a standard error of ${\pm}4.09kg$.

• 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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• 제53권spc호
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• pp.1-8
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• 2008

본 연구는 30개의 고품질 벼 품종을 공시하여 영남 남부 평야지에서 이앙시기의 차이가 도정특성에 미치는 영향을 살펴보고, 우리나라에서 재배되는 고품질 벼 품종 중에서 도정특성이 우수한 유전자원을 탐색하고자 수행하였으며, 그 결과는 다음과 같다. 1. 만기(6월 20일) 이앙시 보통기 이앙에 비하여(6월 5일) 출수가 6일 늦어지면서 등숙율과 백미 완전립비율, 완전미 도정수율이 증가하여 수당립수의 감소에 따른 쌀수량의 차이가 컸음에도 불구하고 완전미 쌀수량은 유의적인 차이가 없었다. 2. 현미 선별체를 이용한 현미립의 두께에 따른 분포특성은 보통기 이앙에 비하여 만기 이앙에서 $1.6{\sim}1.9\;mm$ 두께의 현미립이 줄고, 1.9 mm 이상 두께의 현미립이 증가하여 균일도가 향상되었다. 3. 보통기와 만기 이앙간에 도정 손실율의 차이는 없었으나, 도정에 소요되는 시간이 만기 이앙에서 증가하였다. 4. 도정특성이 우수한 유망유전자원으로 남평벼, 일미벼, 추청벼, 동진벼, 호평, 말그미, 칠보, 히노히까리, 청무 등 9품종을 선정하였다. 5. 등숙율은 추청벼, 동진벼, 밀양 205호가 90% 이상으로 가장 양호 하였으며, 백미 완전립비율은 남평벼가 95%로서 가장 좋았고, 완전미 쌀수량은 남평벼와 일미벼가 500 kg/10a 이상으로 가장 높았다.

• 한국작물학회지
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• 제51권spc1호
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• pp.30-34
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• 2006

남부 산간고랭지에서 고품질 쌀 생산을 위한 질소시비량을 구명하고자 $2002{\sim}2004$년에 남부 산간고랭지 인 운봉에서 삼천벼를 공시하여 질소시비량에 따른 생육, 수량구성요소, 쌀 수량 및 품질 관련형질을 조사한 결과를 요약하면 다음과 같다. 1. 단위면적당 수수와 입수는 다비할수록 많았으나, 등숙비율과 현미천립중은 다비할수록 저하되었다. 2. 백미 외관상 품위에서 완전립 비율은 질소시비량이 많을수록 낮았고, 아밀로스 함량은 질소시비량 간에 별 차이가 없었으나, 단백질 함량은 질소시비량이 증가됨에 따라 다소 높아지는 경향이었다. 3. 쌀 수량과 완전미 수량은 질소 9 kg/10a 수준까지는 증수 되었으나 그 이상의 질소시비량에서는 수량 차이가 인정되지 않았다. 4. 따라서 남부 산간고랭지에서 완전미 수량, 완전미비율, 미질, 등숙비율 등을 고려한 품질향상을 위한 적정 질소시비량은 10a당 9 kg 내외로 판단된다.

• Mycobiology
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• 제46권3호
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• pp.283-286
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• 2018

Fusarium graminearum causes the devastating plant disease Fusarium head blight and produces mycotoxins on small cultivated grains. To investigate the timeframe of F. graminearum infection during rice cultivation, a spore suspension of F. graminearum was applied to the rice cultivars Dongjin 1 and Nampyeongbyeo before and after the heading stage. The disease incidence rate was the highest (50%) directly after heading, when the greatest number of flowers were present, while only 10% of the rice infected 30 days after heading showed symptoms. To understand the mechanism of infection, an F. graminearum strain expressing green fluorescent protein (GFP) was inoculated, and the resulting infections were visually examined. Spores were found in all areas between the glume and inner seed, with the largest amount of GFP detected in the aleurone layer. When the inner part of the rice seed was infected, the pathogen was mainly observed in the embryo. These results suggest that F. graminearum migrates from the anthers to the ovaries and into the seeds during the flowering stage of rice. This study will contribute to uncovering the infection process of this pathogen in rice.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.59-59
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• 2022

The transplanting date of rice affects grain yield and quality, and it is changed by the environment during cultivation. Thus, it is important to provide the optimal transplanting dates for rice growers under global warming environment. In this study, transplanting date experiments with thirty-day-old seedlings of three cultivars (early, mid, and mid-late maturity) were conducted at the National Institute of Crop Science in Suwon from 2018 to 2021 to determine the optimal transplanting dates for and quantify the effect of planting dates on yield and quality. Transplanting date was strongly associated with culitvar across every year. Clear relationships between transplanting date and head rice yield in early and mid-late maturing rice varieties were observed, and the highest head rice yields were observed during transplantings in mid and late June for early maturing cultivar and mid June for mid-late maturing cultivar. It is obvious that the optimal rice transplanting dates have been shifted and are better later than the optimal transplanting dates in 2002-2004. Days to heading was also strongly associated with the transplanting date and cultivar with 89% of the variation explained. Days to heading was reduced in the later transplanting dates. Grain yield was strongly associate with biomass production during ripening(R²=0.85), however translocated biomass from leaf and stem showed little association with grain yield. The results from this study reconfirmed the importance of shifting optimal transplanting dates to maximize head rice yield for the Mid-plain area in South Korea.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.261-261
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• 2017

This study was carried out to provide basic data for spreading rice direct seeding by inducing stabilization of seedlings, yield and quality according to sowing times in rice direct seeding cultivation. In 2016, 'Sukwang' was seeded 3 times by 10 days interval on May. 10, 20, 30 and 6kg/10ha of seeding rate respectively in Iksan. In summary, the number of rice seedling establishment was higher than the optimum seedling establishment level at all sowing periods and the seeding rate was better as the sowing period was delayed. Weed development by sowing was the highest at early sowing, May 10, and decreased at late sowing. Heading dates were delayed by 3days for sowing on May 10, 7days for sowing on May 20, and 11 days on sowing on May 30. Rice yield increased with the delay sowing time and compared to the transplanting. It was 84% in sowing on May 10, 94% in sowing on May 20, and 99% in sowing on May 30. In addition, head rice ratio and head rice yield increased according to delayed of seedling.

• 농업과학연구
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• 제42권3호
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• pp.151-158
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• 2015

This study was conducted to know the variation and relationship of rice grain quality and starch pasting properties by transplanting times. Two early maturing rice cultivars which accounted for the most area of early maturing rice cultivar in Chungnam province were used. The experiment was laid out in a split-plot design with 3 replications. The main plot consisted of three transplanting times viz. early (April 25), ordinary (May 25) and late (June 25) with sub-plots containing two cultivars. According to the transplanting times, most of rice grain quality and starch pasting properties showed significant difference and Joami showed higher grain quality than Unkwang in all transplanting times. Especially, rice grain quality was improved when transplanted late, showing high head rice and glossiness of cooked rice due to the lower mean temperature during grain filling stage. Glossiness of cooked rice was positively correlated with head rice ratio, amylose content and setback value, and negatively correlated with chalky rice ratio and protein content. The highest positive and negative correlation were observed between breakdown value and peak viscosity ($r=0.98^{**}$), and breakdown and setback ($r=-0.94^{**}$), respectively. These results provide some information for rice researchers and producers producing cultivars with an improved quality, suggesting that rice quality is highly influenced by temperature at grain filling stage, and transplanting times is crucial in improving rice quality. In addition, starch pasting properties are useful for determining rice quality because rice grain quality and starch pasting properties are dependent on each other.