• 제목/요약/키워드: Seed grain

검색결과 450건 처리시간 0.04초

장수지역에서 국내육성 호밀품종의 채종재배기술 개발 (Devolpment of Optimal Seed Production Methods Using Domestic Rye Cultivar in Jangsu Province)

  • 송주희;한옥규
    • 현장농수산연구지
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    • 제22권1호
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    • pp.43-53
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    • 2020
  • 본 연구는 국내 호밀 종자의 자급률을 향상시키기 위해 전북 장수지역에 적합한 종자 채종기술을 개발하고자 2013~2015년까지 3개년에 걸쳐 시험을 실시하였다. 품종은 국내 육성종인 곡우호밀을 사용하였다. 시험구는 파종량 4수준(3, 5, 7, 9 kg/10a), 질소시비량 4수준(0, 3, 6, 9 kg/10a)으로 처리별 단요인 시험을 실시하였다. 시험구배치는 난괴법 3반복으로 하였으며, 생육특성과 종실생산성을 평가하였다. 장수지역에서 호밀 종자의 파종량을 10a당 3 kg으로부터 9 kg으로 증가시킴에 따라 m2당 이삭수·도복이 증가하였으며, 유효경수·임실률·리터중·1000립중 및 종실수량은 감소하였다. 질소 시비량은 10a 당 3 kg으로부터 9 kg으로 증가시킴으로써 m2당 이삭수, 간장, 1수립수, 도복 및 종실수량은 증가하였으며, 1립중 및 리터중은 감소하였다. 따라서 호밀의 종실수량, 파종용 종자 비용과 질소 과잉 시비에 따른 환경오염, 도복 등을 고려할 때 장수지역에서 호밀 종자생산을 위해 적합한 파종량은 10a당 5 kg, 질소 시비량은 10a당 6 kg로 추천되었다.

산청지역에서 파종량 및 질소 시비량에 따른 호밀의 생육과 종실 수량 (Effects of Seeding Rate and Nitrogen Fertilizer Level on Growth and Seed Productivity of Rye Cultivar in Sancheong Province)

  • 김종성;김진진;한옥규
    • 현장농수산연구지
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    • 제22권2호
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    • pp.89-97
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    • 2020
  • 국내에서 소비지역에 필요한 호밀 종자를 생산하기 위해 경남지역에 적합한 종자 채종기술을 개발하고자 2013~2015년까지 3개년에 걸쳐 경상남도 산청에서 시험을 실시하였다. 품종은 국내 육성종인 곡우호밀을 사용하였고, 시험구는 파종량 3수준(3, 5, 7 kg 10 a-1), 질소시비량 4수준(0, 3, 6, 9 kg 10 a-1)의 분할구배치법 3반복으로 하였으며, 생육특성과 종실 생산성을 평가하였다. 호밀 종자의 파종량을 3 kg 10 a-1로부터 7 kg 10 a-1로 증가시킴에 따라 설립중이 증가하고 임실률과 1 수립수가 감소하였지만 m2당수수가 증가하여 전체 수량이 증가하는 경향이었다. 그리고 유효경비율, 리터중, 1000립중이 다소 감소하였으나 수량에는 영향이 크지 않았다. 질소 시비량을 무비로부터 9 kg 10 a-1로 증가시킴에 따라 출수기가 늦어지고 도복이 다소 증가하지만, m2당수수와 1수립수가 많아져서 수량이 증가하였다. 그리고 호밀의 종실 수량은 파종량과 질소 시비량 간에 교호작용을 보이지 않았다. 호밀의 종실 수량, 파종용 종자 비용과 질소 과잉 시비에 따른 환경오염, 도복 등을 고려할 때 산청지역에서 호밀 종자생산을 위해 적합한 파종량은 5 kg 10 a-1, 질소 시비량은 3 kg 10 a-1로 추천되었다.

$U_3O_8$ 종자가 $UO_2$ 핵연료 소결체의 입자성장에 미치는 영향 (Effect of $U_3O_8$-seed on the grain growth of uranium dioxide)

  • 이영우;김동주;김건식
    • 한국결정성장학회지
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    • 제17권2호
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    • pp.75-81
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    • 2007
  • [ $UO_2$ ] 소결체와 $U_3O_8$종자를 5wt% 첨가한 $UO_2$ 소결체의 치밀화 과정 및 입자성장 양상을 소결 온도 및 시간을 변수로 하여 분석하였다. $UO_2$ 성형체와 5wt% $U_3O_8$ 종자 첨가 성형체를 수소분위기에서 $1300^{\circ}C$에서 $1700^{\circ}C$로 온도를 올려가며 0시간에서 4시간 소결하여 밀도와 입자크기를 측정하였다. $1300^{\circ}C$까지는 종자 첨가에 상관없이 거의 같은 밀도를 가졌지만 온도가 올라가면서 종자 첨가 소결체의 치밀화가 저하되었다가 $1700^{\circ}C$ 근처에서 거의 비슷한 밀도를 가지게 된다. 입자성장의 경우, $1600^{\circ}C$에서는 종자 입자를 제외하면 기지상의 입자 크기는 거의 비슷하지만 $1700^{\circ}C$ 이후에서는 종자첨가 $UO_2$ 소결체의 입자성장이 종자가 첨가되지 않을 경우에 비하여 2배 이상 빠르게 진행되었다.

상온분사분말공정에 의해 SrTiO3 (100), (110) Seed에 코팅된 BaTiO3의 고온 성장 거동 분석 (High Temperature Grain Growth Behavior of Aerosol Deposited BaTiO3 Film on (100), (110) Oriented SrTiO3 Single Crystal)

  • 임지호;이승희;김기현;지성엽;정승운;박춘길;정한보;정대용
    • 한국재료학회지
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    • 제29권11호
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    • pp.684-689
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    • 2019
  • Single crystals, which have complexed composition, are fabricated by solid state grain growth. However, it is hard to achieve stable properties in a single crystal due to trapped pores. Aerosol deposition (AD) is suitable for fabrication of single crystals with stable properties because this process can make a high density coating layer. Because of their unique features (nano sized grains, stress inner site), it is hard to fabricate single crystals, and so studies of grain growth behavior of AD film are essential. In this study, a $BaTiO_3$ coating layer with ${\sim}9{\mu}m$ thickness is fabricated using an aerosol deposition method on (100) and (110) cut $SrTiO_3$ single crystal substrates, which are adopted as seeds for grain growth. Each specimen is heat-treated at various conditions (900, 1,100, and $1,300^{\circ}C$ for 5 h). $BaTiO_3$ layer shows different growth behavior and X-ray diffraction depending on cutting direction of $SrTiO_3$ seed. Rectangular pillars at $SrTiO_3$ (100) and laminating thin plates at $SrTiO_3$ (110), respectively, are observed.

Agronomic Characters and Their Correlation Coefficient on Black Seeded Soybeans Collected in Chonnam Province

  • Kwon, Byung-Sun;Choi, Seong-kyu;Shin, Jeong-Sik;Shin, Dong-Youn;Kyu Hwan
    • Plant Resources
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    • 제5권2호
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    • pp.118-123
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    • 2002
  • In order to obtain the genetic information on the quantitative characters of black seeded soybeans, which would be needed to improve selection efficiency for breeding high yielding genotype, 45 varieties of black seeded soybeans collected in Chonnam, Korea were grown and variations of several important characters were observed. Heritability of each observed character, phenotypic and genotypic correlations among the characters and contribution of each yield component on grain yield through path coefficient analysis were estimated. Both number of pods per plant and 100-seed weight showed not only high heritability but also highly significant phenotypic and genotypic correlation with seed yield, and hence it was desirable to select plants with more number of pods per plant and higher 100-seed weight than raise seed yield of black seeded soybeans collected in Chonnam. In addition, number of pods per and 100-seed weight were proved to be the most influential variables on the viability of seed yield by path coefficient analysis. Since these showed the high heritability of number of pods per plant, selection of plants with higher 100-seed weight would be more efficient for breeding high yielding genotype.

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Transcriptome and Small RNAome Analyses Reveal the Association of pre-harvest Sprouting and Heat Stress Response in Rice (Oryza sativa L.)

  • Minsu Park;Woochang Choi;Sang-Yoon Shin;Yujin Kweon;Jihyun Eom;Minsun Oh;Chanseok Shin
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2023년도 춘계학술대회
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    • pp.157-157
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    • 2023
  • Pre-harvest sprouting (PHS) in rice (Oryza sativa L.) is one of the main problems associated with seed dormancy. PHS causes yield loss and reduction of grain quality under unpredictable humid conditions at the ripening stage, thus affecting the economic value of the rice crop. To resolve this issue, it is important to understand the molecular mechanism underlying seed dormancy in rice. Recent studies have shown that seed dormancy is affected by a large number of genes associated with plant hormones. However, the effect of heat stress on seed dormancy and plant hormones is not well understood. In this study, we compared the PHS rate as well as the transcriptome and small RNAome of the seed embryo and endosperm of two different accessions of rice, PHS-susceptible rice (low dormancy) and PHS-resistant rice (high dormancy) under three different maturation stages. We identified and verified the candidate genes associated with seed dormancy and heat stress-related responses in rice using quantitative real-time PCR. We newly discovered hormone-related genes, heat shock protein-related genes, and miRNAs potentially involved in PHS. These findings provide a foundation for understanding the dynamics of transcriptome and small RNAome of hormone- and heat stress-related genes, which affect PHS during seed maturation.

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Amorphous Cr-Ti Texture-inducing Layer Underlying (002) Textured bcc-Cr alloy Seed Layer for FePt-C Based Heat-assisted Magnetic Recording Media

  • Jeon, Seong-Jae;Hinata, Shintaro;Saito, Shin
    • Journal of Magnetics
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    • 제21권1호
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    • pp.35-39
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    • 2016
  • $Cr_{100-x}Ti_x$ amorphous texture-inducing layers (TIL) were investigated to realize highly (002) oriented $L1_0$ FePt-C granular films through hetero-epitaxial growth on the (002) textured bcc-$Cr_{80}Mn_{20}$ seed layer (bcc-SL). As-deposited TILs showed the amorphous phase in Ti content of $30{\leq}x(at%){\leq}75$. Particularly, films with $40{\leq}x{\leq}60$ kept the amorphous phase against the heat treatment over $600^{\circ}C$. It was found that preference of the crystallographic texture for bcc-SLs is directly affected by the structural phase of TILs. (002) crystallographic texture was realized in bcc-SLs deposited on the amorphous TILs ($40{\leq}x{\leq}70$), whereas (110) texture was formed in bcc-SLs overlying on crystalline TILs (x < 30 and x > 70). Correlation between the angular distribution of (002) crystal orientation of bcc-SL evaluated by full width at half maximum of (002) diffraction (FWHM) and a grain diameter of bcc-SL indicated that while the development of the lateral growth for bcc-SL grain reduces FWHM, crystallization of amorphous TILs hinders FWHM. $L1_0$ FePt-C granular films were fabricated under the substrate heating process over $600^{\circ}C$ with having different FWHM of bcc-SL. Hysteresis loops showed that squareness ($M_r/M_s$) of the films increased from 0.87 to 0.95 when FWHM of bcc-SL decreased from $13.7^{\circ}$ to $3.8^{\circ}$. It is suggested that the reduction of (002) FWHM affects to the overlying MgO film as well as FePt-C granular film by means of the hetero-epitaxial growth.