• Proceedings of the Korean Society of Organic Agriculture Conference
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• 2009.12a
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• pp.283-283
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• 2009

본 연구에서는 2008년 전라남도 나주시 반남지역과 노안지역 두 곳의 벼 농가포장에서 유기재배 및 관행(일반)재배 시험을 수행하고 벼 병충해발생, 생육 및 수량, 그리고 쌀의 품위 및 품질을 비교 분석하였다. 시험의 연구결과를 요약하면 다음과 같다. 1) 벼 병충해 방제는 노안지역 관행재배는 2회, 반남지역 관행재배는 4회 실시하였으며 유기재배는 노안, 반남지역 모두 2회 실시하였다. 포장에서 벼 병해충은 줄무늬잎마름병, 잎도열병, 이삭도열병, 잎집무늬마름병, 흰잎마름병, 혹명나방, 멸구류가 주로 발생하였다. 벼 병해충 중 잎도열병, 이삭도열병, 혹명나방은 관행재배보다 유기재배에서 발생이 많았다. 2) 벼생육상황은 간장이나 수장은 관행재배에 비해 유기재배에서 약간 짧은 경향이었다. 노안지역은 유기재배의 경우 관행재배에 비해 주당수수는 0.6개 정도 많았으나 수당입수, 등숙비율, 정현비율, 현미 천립중이 낮았다. 반면 반남지역은 유기재배의 경우 관행재배에 비해 주당수수는 0.8개 정도 적었으나 수당입수와 등숙비율은 높았고 정현비율은 낮았다. 전체 수량은 유기재배가 관행재배에 비해 노안지역은 84% 수준이고, 반남지역은 94% 수준이었다. 3) 쌀의 품위는 노안지역과 반남지역 두 지역 모두 완전립율이 관행 재배보다 유기재배에서 낮은 경향을 보였다. 쌀의 품질은 반남지역의 경우 유기재배시 기비로 사용한 질소가 관행재배에 비해 많아서 늦게 비효가 발현되어 이삭도열병, 혹명나방 피해가 발생하여 관행재배에 비해 단백질, 취반미 윤기치값이 낮았다. 반면 노안지역의 경우 유기재배시 기비로 사용한 질소가 관행재배에 비해 적어서 관행재배보다 단백질, 백도, 취반미 윤기치 값 등에서 양호하게 나타났다. 이상의 연구 결과를 소비자들에게 홍보하여 이들로부터 소비를 촉진케 함으로써 벼 유기재배 농가의 소득증대에 기어코자 한다.

• 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.

• 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.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.07a
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• pp.3-8
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• 2002

쌀은 전 세계에서 매년 약 4억 톤이 생산되어 세계인구의 약 45%에게 주식으로 제공되고 있다. 우리나라에서는 쌀 농사가 농업소득의 약 44%를 차지하는 농가의 주 소득원으로 경제적 비중이 크다. 또한 WTO 개방경제 체제에서는 쌀 생산농가가 생존하기 위해서는 생산비 절감을 통한 가격경쟁력 제고와 품질향상을 통한 소비자 선호도 확보가 가장 중요한 과제이다. 지금까지 우리나라의 벼농사는 생산비 절감이나 품질향상보다는 수량증대에 치중하여 쌀 산업의 국제경쟁력은 매우 취약한 실정이다. 손 모내기에서 중묘 기계이앙 기계기술이 확립되어 확대보급 되었고 이보다 육묘비용 및 노력을 절감할 수 있는 어린 모 재배 기술이 보급되기 시작하였으나, 미국 등 선진국의 벼농사 노동 투하시간 3.5시간/㏊에 비하여 우리나라는 328시간/㏊ 쌀 생산비는 미국의 2,018천원/㏊에 비하여 우리나라는 5,105/천원㏊로 월등히 높아 노동 투하시간을 획기적으로 줄일 수 있는 기계기술 개발이 요구되고 있다. (중략)

• KOREAN JOURNAL OF CROP SCIENCE
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• v.48 no.6
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• pp.534-539
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• 2003

The yield and quality characteristics of three rice varieties(Seojinbyeo, Ilpumbyeo, and Chuchungbyeo) in reclaimed saline paddy field were investigated under different cultural practices, three transplanting times (May 15, May 30 and June 15) and four harvest times (40, 50, 60 and 70days after heading) in order to obtain basic information for the production of high quality rice. Brown rice yield of three rice varieties were significantly higher in early and medium than late season cultivation. The protein content of milled rice showed high interaction effect between transplanting time and harvest time. Palatability values of Seojinbyeo and Ilpumbyeo were significantly higher in late than medium season cultivation, but Chucheongbyeo did not show any difference in its palatability value by different transplanting time. The palatability values of three rice variety was the highest in the harvest at 40 days after heading. The grain yield of three rice varieties were higher in early and medium than late season cultivation, whereas palatability values of three rice varieties were significantly higher in the early and late season cultivation than medium season cultivation. The palatability value measured by rice taster showed a highly negative correlation(r=$0.43^{**}$) with cumulative air temperature during ripening period.

• 농업기술회보
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• v.49 no.4
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• pp.21-22
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• 2012

벼 흰잎마름병은 벼에 발생하는 중요한 세균병 중 하나로 우리나라 벼 재배에서 가장 큰 피해를 주고 있다. 한 번 발생하면 치료가 힘든 병으로 알려져 있어 예방위주로 철저히 방제해야 수량감소와 쌀의 품질저하를 막을 수 있다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.48 no.6
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• pp.501-505
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• 2003

The growth characteristics and damage of naked barley infected with barley yellow mosaic virus (BaYMV) were investigated between resistant and susceptible varieties in habitual field plot of BaYMV BaYMV of the barley plants with typical disease symptom were identified by enzyme linked immunosorbent assay (ELISA) test. The visual degree (0-9) based on disease symptoms of BaYMV was different as 9 and 1 between susceptible variety Baegdong and resistant variety Naehanssalbori, respectively. Susceptible variety, Baegdong showed significant damage in culm length, number of kernel per spike and tiller per square meter but not in 1,000 kernel weight, so these results caused yield reduction to only 80% comparing to the control. Seed germination did not affected by BaYMV infection both in susceptible and resistant variety. In grain quality test, abortive grain yale and crude protein content were significantly increased compared to the control. The relationships between BaYMV infection and growth characteristics showed the negative correlations in culm length, number of tiller, 1000 kernel weight and yield, but it showed the positive correlation in crude protein contents. These results implied that BaYMV can affect not only barley growth and yield but grain quality.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.47 no.3
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• pp.259-262
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• 2002

Relationship between yield and palatability value measured by vice taster among 9 rice varieties was investigated to obtain basic information for production of rice with high quality in reclaimed paddy field. The rice yield showed a highly negative correlation with palatability value of milled rice (r=-0.49$^{**}$). The varieties of high palatability value tend to show low yield. The protein content of milled rice grown in reclaimed paddy field was higher than 7.5% mainly due to heavy fertilization of nitrogen and irrigation of eutrophicated water, The rice varieties such as Daeanbyeo, Jinpumbyeo and Sindongjinbyeo were recommendable only for higher yield, but in view of rice quality, Kwanganbyeo, Surabyeo and Nampyoengbyeo were more recommendable because of their lower protein content and higher palatability value.e.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.57 no.3
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• pp.233-237
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• 2012

The yield of Unkwangbyeo transplanted on May 10 was 596kg/10a in 2010. The rice yield decreased with delaying transplanting date. The head rice rate was 91.9% when transplanted in June 10, and the rate decreased as the transplanting got earlier. In 2011, the yield increased by 5~8% when transplanted on June 10 because of the increase of Ripened grain ratio and 1,000 grain weight. The yield, when transplanted in the distance of $30{\times}13cm$ with 5 plants, was higher than the other treatments. The yield of Oraebyeo, transplanted on June 10, decreased by 6% compared with transplanting on May 25, while the yield, transplanted in the distance of $30{\times}13cm$ with 5 plants, increased by 5% because of the increase in the number/$m^2$ of panicle and grain. The head rice rates of the two varieties increased by 5~7% and the Toyo palatability appeared to get improved when transplanted on June 10 possibly because of the effect of low ripening temperature by 0.9~$1.6^{\circ}C$ with delaying heading date from 9 to 12 days.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.55 no.1
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• pp.70-75
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• 2010

In Korea, standard N application level was amended from 110 to 90kg per ha for high quality rice production in 2005. So far, N application method, however, has not been considered for yield and quality based on changed standard N application level. Therefore, this experiment was conducted to find out more efficient N application method for improving rice quality or labor saving under the amended standard N application level with several varieties at three site (Suwon, Iksan, and Milyang) for two years from 2005 to 2006. Top dressing of N at 15 days before heading compared to the standard (25 days before heading) showed improved rice qualities such as 1000 grain weight and head rice ratio without changing rice yield and protein content of brown rice. In addition, there were no significant differences in yield and quality between different N split application of 70-0-30% and 50-30-20%, indicating that the former would be useful for labor saving without yield decrease and quality deterioration.