• 한국작물학회지
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• 제23권3호
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• pp.12-15
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• 1978

The agriculture in Korea has been gradually changed from a labor-intensive type to a labor-saving one which aims to maximize productivity of labor. Herbicides have been utilized in rice farming since 1955. The consumption of herbicides rapidly increased during the last decade. However, the technology of weed control with herbicides has not been developed yet. For the dissemination of efficient weed control methods in farming, both research and extension activities on herbicide utilization should be strengthened. Appropriate research and guidance units on weed control should be established as early as possible, in order to provide the necessary technical information.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2021년도 춘계학술대회
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• pp.43-43
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• 2021

• 한국초지조사료학회지
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• 제28권1호
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• pp.29-34
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• 2008

본 시험은 품종 및 수확시기가 총체 벼 사일리지의 품질에 미치는 영향을 구명하기 위하여 2004년부터 2005년까지 축산연구소에서 수행되었다. 식용벼인 추청벼와 총체 벼 전용품종인 하마사리를 이용하여 생육시기별로 6회(출수기, 개화기, 유숙기, 호숙기, 황숙기 및 완숙기)에 걸쳐 수확을 하여 사일리지로 조제하였다. 조단백질 함량은 숙기가 진행됨에 따라 감소되었으며 TDN 함량은 증가되었다. 평균 조단백질 함량은 총체 벼 전용품종이 식용벼 품종보다는 높게 나타났다. ADF 및 NDF 함량은 숙기가 진행됨에 따라 감소되었으며 ADF로 추정된 TDN 함량은 숙기가 진행됨에 따라 증가되었다. 그러나 품종간에는 통계적 유의성이 나타나지 않았다(p<0.05). 사일리지의 평균 pH는 4.69 이었으며 숙기가 진행됨에 따라 증가하였다. 생육이 진행됨에 따라 초산 및 낙산 함량은 감소되었으나 젖산 함량은 증가되었다. 품질등급은 호숙기에서 가장 우수하였다. 이상의 결과를 종합하여 볼때 총체 벼 사일리지는 전용 품종이 일반 벼 품종보다 약간 개선되는 것으로 나타났으나 유의적인 차이는 없었다. 따라서 양질의 총체 벼 사일리지 조제를 위해서는 호숙기 전후에 수확하여 사일리지를 만드는 것이 추천된다.

• 한국작물학회지
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• 제63권1호
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• pp.35-40
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• 2018

곡류 가공 부산물인 미강과 맥강을 활용한 GABA 생산성 향상을 위하여 맥강과 미강의 첨가량, glutamate 농도 및 보리 품종에 따른 GABA 생산량을 측정 비교하였다. 그 결과 맥강이 미강 보다 모든 조건에서 높은 GABA 생산성을 보였고, 맥강을 활용한 GABA 생산 반응에서 최적 조건은 맥강 첨가량은 0.15 g/mL, glutamate 농도는 10 mM, 반응온도는 $20^{\circ}C$로 이때 glutamate의 GABA로의 전환율은 75.1%였다. 또한 보리 품종에 따른 GABA 생산성은 유의적인 차이를 나타내었으며 다송과 영백찰쌀보리가 높은 GABA 생산성을 나타내었다. 본 연구결과 부산물인 맥강을 이용하여 GABA 생산성을 향상시킬 수 있었으며, 보리 품종이 GABA 생산의 중요 요인으로 작용하였다.

• 한국토양비료학회지
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• 제45권6호
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• pp.1187-1193
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• 2012

Water control is mainly one of the key factors that can affect nitrous oxide ($N_2O$) emissions from soils. This study was undertaken to determine the effect of intermittent drainage compared to continuous flooding (conventional water regime) on $N_2O$ emission to global warming potential (GWP) with NPK (standard cultivation practice), NPK+Straw, and PK fertilizations. Nitrous oxide emission rates were collected twice a week using a closed chamber method. With continuous flooding, nitrogen (N) application increased $N_2O$ emission by 106.6% ($0.64kg\;ha^{-1}$ in NPK) with respect to the PK treatment ($0.31kg\;ha^{-1}$), and straw addition to NPK enhanced 148.3% of seasonal $N_2O$ flux ($0.77kg\;ha^{-1}$ in NPK+Straw). Although seasonal $N_2O$ emission slightly increased by 16.1-42.9% with intermittent irrigation, its seasonal $CH_4$ emission drastically reduced at 43.5-52.8% resulting in a lower GWP at 48.9-58.5% with respect to that of continuously flooded treatments ($4.51Mg\;CO_2\;ha^{-1}$, PK; $7.60Mg\;CO_2\;ha^{-1}$, NPK; $14.55Mg\;CO_2\;ha^{-1}$, NPK+Straw). Rice yield, at similar fertilization with the continuously-flooded rice field, was not affected by intermittent irrigation. Conclusively, intermittent irrigation can be very effective and a rational soil management strategy to mitigate GWP with considering rice productivity in a temperate paddy rice field like Korea.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.151-151
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• 2017

In Asia, rice production has some difficulties with reduction of farm household population and increase of elderly population. As a result, it has resulted in inefficiency and we needs to reduce labor force and improve labor productivity. Direct-seeding in rice could reduce labor and production costs, the area of direct seeding is increasing in japonica rice production in Asia. In direct seedling cultivation competition against weeds is one of most important concern. So, low temperature germinability and mesocotyl elongation should be considered. In this study, we evaluated the mesocotyl length and low temperature germination conducted association analysis using 137 korea core collections. An average length of mesocotyl among 137 core collections was skewed range from 0mm to 43mm. we searched candidate gene around target SNP. Such related traits, genome-wide association study (GWAS) analysis was carried out using GAPIT. Also, average mesocotyl length of 394 korea landrace cultivars was measured ranging from minimum 0 mm to maximum 34mm. 30 out of 394 Korea landrace cultivar conducted re-sequencing, and haplotype analysis of candidate gene. we searched these related resources, which including germination of low temperature and mesocotyl elongation. This could be used for the development of direct-seeding cultivars. The valiated accession of core collection and landrace cultivars will be used development of direct-seedling cultivar in the future.

• 한국작물학회지
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• 제45권1호
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• pp.26-31
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• 2000

This study was carried out to obtain the basic information for breeding cold-tolerant rice varieties with high yield-productivity through wide crosses between indica and japonica rice. Genetic analysis was conducted using 55 F$_1$s obtained from half-diallel crosses among eleven cultivars of various origin including indica and japonica rice. Screening for cold tolerance was done with cold-water irrigation after transplanting until ripening stage. Both general combining ability (GCA) and specific combining ability (SCA) effects were highly significant in all characters associated with dry matter accumulation at 30 and 50days after cold-water irrigation (DAC). The variance of GCA was much larger than that of SCA in plant height, shoot dry weight per plant (DWP), crop growth rate (CGR) and cold-water response index (CRI) of these characters except CRI of shoot dry weight per plant. The DWP, CGR and CRI of these characters of Gaochan 102, Tong88-7 and TR22183 were markedly higher than those of the others. GCA effects of these varieties on DWP, CGR and their CRI were also higher than those of the others, indicating that they are useful as promising parents for breeding cold-tolerant varieties. Analysis of genetic parameters for 11$\times$11 half-diallel F$_1$s revealed that inter-locus gene interaction were concerned in the expression of plant height at 50 DAC, CRI of DWP at 50 DAC, and CRI of CGR, and that intra-locus gene interaction for plant height and the other characters were partial dominance and over-dominance, respectively. Narrow-sense heritability (h$^2$$_{N}$) was the highest in plant height as 0.729, and the lowest in CRI of DWP at 30 DAC as 0.048, suggesting that selection for cold tolerance will be quite effective in case that the selection criterion is the performance itself.f.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.967-976
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• 1996

Straw and other fibrous by-products are inevitably produced during cereal production and have traditionally been used for many purposes including feeding animals . The potential of these by -products as a feed resource for ruminants is being increasingly appreciated (FAO , 1977). In the future, the amount of cereals fed to farm animals will have to be reduced and livestock will have to rely more on by-products such as straw. The method of animal production can be classified by the major portion of feed. One is animal forage and the other is grains. In Korea , livestock farmers normally depend more than 70% upon grains for the feed stuff. The livestock production system causes the unbalance of nutrition, and results in low productivity of animal farming. In many livestock farms in Korea the rice straw is using as a major forage and the amount of rice straw fed takes 46% of total amount of required forages. Especially the rice straw is mainly using during spring, fall and winte season. However, there are still lots of problems to solved such as harvesting cost, transportation between rice farm ad livestock farm, and quality loss during drying and storage . Therefore the mechanization of straw harvesting is urgently needed to use the renewable agricultural by-products and to overcome the shortage of animal forage. The objective of this research is to develope a straw harvester with new concept which can solve the problems of the quality loss and the labor cost during drying in a field, collecting , and storage. The developed straw harvester is self-propelled machine rebuilt by rice combine and equipped with the pick-up device, the macerater and the mat-forming device.

• The Plant Pathology Journal
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• 제32권6호
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• pp.552-562
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• 2016

Pathogenesis-related proteins play multiple roles in plant development and biotic and abiotic stress tolerance. Here, we characterize a rice defense related gene named "jasmonic acid inducible pathogenesis-related class 10" (JIOsPR10) to gain an insight into its functional properties. Semi-quantitative RT-PCR analysis showed up-regulation of JIOsPR10 under salt and drought stress conditions. Constitutive over-expression JIOsPR10 in rice promoted shoot and root development in transgenic plants, however, their productivity was unaltered. Further experiments exhibited that the transgenic plants showed reduced susceptibility to rice blast fungus, and enhanced salt and drought stress tolerance as compared to the wild type. A comparative proteomic profiling of wild type and transgenic plants showed that overexpression of JIOsPR10 led to the differential modulation of several proteins mainly related with oxidative stresses, carbohydrate metabolism, and plant defense. Taken together, our findings suggest that JIOsPR10 plays important roles in biotic and abiotic stresses tolerance probably by activation of stress related proteins.

• 한국식품과학회지
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• 제35권4호
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• pp.733-737
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• 2003

고혈압 예방 효과를 가진 전통주를 개발하기 위하여 우선 엔지오텐신전환효소(ACE)저해 활성이 있다고 알려진 몇 가지 곡류를 이용하여 입국을 만들어 알콜 발효특성을 조사하였다. 또한 선정된 입국과 각종 두류분말을 덧밥에 첨가하여 전통주를 제조한 후 품질특성과 ACE저해 활성 및 기호도 등을 조사하였다. 수수 입국을 이용하여 전통주를 제조하였을 때 에탄올 생성량은 13.8%로 다른 입국으로 만든 술 보다 약간 낮았으나 ACE저해 활성은 43.3%로 제일 높았다. 또한 녹두가루를 덧밥의 50% 첨가하고 민들레꽃을 1% 첨가한 후 수수 입국과 주모로 $30^{\circ}C$에서 10일간 발효 시켰을때 에탄올 생성량과 항고혈압 활성을 나타내는 ACE저해 활성이 약 69%로 크게 증가하였고 맛과 향도 우수하였다.