• 제목/요약/키워드: organic N

검색결과 4,334건 처리시간 0.031초

유기농 자재의 연용이 토양의 이화학적 성질과 토마토의 생육, 수량 및 체내성분에 미치는 영향 (Effect of Continuous Application of Organic Farming Materials on the Soil Physicochemistry Property and Plant Growth, Yield and Components of Tomato)

  • 오주성;이종성;강경희;김회태;정원복;정순재
    • 한국유기농업학회지
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    • 제9권1호
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    • pp.75-89
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    • 2001
  • This study the effects of the application of organic farming materials on the soil Physicochemistry property and plant growth, yield and components of Tomato were compared with conventional culture. The results obtained from the experiment are summarized as follows : 1. The effect of soil chemical properties after application organic farming materials, The amounts of pH and O.M. in N, P, K treated plot were few of change, To the contrary, fermentation compost and microorganisms fermentation compost treated plot were some increase, Amount of $P_2$$O_{5}$, Ca and K increase in comparison with the N, P, K treated plot. 2. Changes of soil microbial after application organic farming materials, The number of bacteria, actinomycetes and fungi in N, P, K treated plot were appeared definite direction. to the contrary, The number of bacteria and actimycetes in fermentation compost and microorganisms fermentation compost treated plot showed the increased tendency, The number of fungi showed the decreased tendency. 3. Effect of organic farming materials application on the growth and yield of tomato was superior in order of microorganisms fermentation compost plot〉 chemical fertilizers plot〉 fermentation compost plot. especially, chicken manure + microorganisms fermentation compost treated plot was the highest. 4. Effect of organic farming materials application on the components of tomato were not different.

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시용된 유기물 종류별 토양중 질소무기화 (Nitrogen Mineralization in Soils Added with Different Organic Materials)

  • 이종식
    • 한국토양비료학회지
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    • 제31권3호
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    • pp.233-237
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    • 1998
  • 토양에 시용되는 각종 폐유기물들의 토양중 질소 무기화율을 알아보기 위하여 3종의 폐유기물(A:도시고형폐기물+하수슬러지, B:목재잔사, C:목재잔사+하수슬러지)를 토양에 처리한 뒤 12주 동안 $25^{\circ}C$ 호기조건에서 질소 무기화율을 조사한 결과, 초기 질산화율은 C 처리구가 다른 처리구에 비하여 높았다. 또한 무기화된 총질소량은 C 처리구에서 가장 많았으나 실험기간 동안의 질소 무기화율과 질산화율은 무처리구에서 높게 나타났다.

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Potential Nitrogen Mineralization and Availability in Upland Soil Amended with Various Organic Materials

  • Im, Jong-Uk;Kim, Song-Yeob;Jeon, Seong-Hwa;Kim, Jang-Hwan;Yoon, Young-Eun;Kim, Sook-Jin;Lee, Yong-Bok
    • 한국토양비료학회지
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    • 제50권1호
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    • pp.40-48
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    • 2017
  • In this study, we evaluated the nitrogen (N) mineralization potential and Nitrogen use efficiency (NUE) of oil-cake, compost, hairy vetch and barley, which are the most widely used organic amendments in South Korea. The N mineralization potential (No) for organic fertilizers treated soil was highest for the hairy vetch treatment with a value of $18.9mg\;N\;100\;g^{-1}$, followed by oil-cake, barley and compost. The amount of pure N mineralization potentials in hairy vetch, oil-cake, barley and compost treatments were 8.42, 7.62, 3.82 and $3.60mg\;N\;100\;g^{-1}$, respectively. The half-life ($t_{1/2}$) of organic N in soil amended with oil-cake fertilizer mineralized quickly in 17 days. While, $t_{1/2}$ values of organic N for the compost and barley treatments accounted to 44.4 and 44.1 days, respectively. Oil-cake was good in supplying nutrients to plants. Compost and barley inhibited plant growth in the beginning growth stage and this is attributed to N immobilization effect. The results of this study highlight that compost and barley could be used as potential slow release fertilizers in conventional agriculture.

Identification of Tetrachloroethylene Sorption Behaviors in Natural Sorbents Via Sorption Models

  • Al Masud, Md Abdullah;Choi, Jiyeon;Shin, Won Sik
    • 한국지하수토양환경학회지:지하수토양환경
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    • 제27권6호
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    • pp.47-57
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    • 2022
  • A number of different methods have been used for modeling the sorption of volatile organic chlorinated compounds such as tetrachloroethylene/perchloroethylene (PCE). In this study, PCE was adsorbed in several natural sorbents, i.e., Pahokee peat, vermicompost, BionSoil®, and natural soil, in the batch experiments. Several sorption models such as linear, Freundlich, solubility-normalized Freundlich model, and Polanyi-Manes model (PMM) were used to analyze sorption isotherms. The relationship between sorption model parameters, organic carbon content (foc), and elemental C/N ratio was studied. The organic carbon normalized partition coefficient values (log Koc = 1.50-3.13) in four different sorbents were less than the logarithm of the octanol-water partition coefficient (log Kow = 3.40) of PCE due to high organic carbon contents. The log Koc decreased linearly with log foc and log C/N ratio, but increased linearly with log O/C, log H/C, and log (N+O)/C ratio. Both log KF,oc or log KF,oc decreased linearly with log foc (R2 = 0.88-0.92) and log C/N ratio (R2 = 0.57-0.76), but increased linearly with log (N+O)/C (R2 = 0.93-0.95). The log qmax,oc decreased linearly as log foc and log C/N increased, whereas it increased with log O/C, log H/C and log (N+O)/C ratios. The log qmax,oc increased linearly with (N+O)/C indicating a strong dependence of qmax,oc on the polarity index. The results showed that PCE sorption behaviors were strongly correlated with the physicochemical properties of soil organic matter (SOM).

마이크로웨이브를 이용한 N', N'-Disubstituted N-Fluorophenylformamidine 유도체의 편리한 합성과 살충활성 (A Convenient Synthesis of N', N'-Disubstituted N-Fluorophenylformamidines by Using Microwave and Their Insecticidal Activities)

  • 이동국;정근회;고영관;류재욱;우재춘;구동완;최용호;박노중;김진주;김태준
    • 농약과학회지
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    • 제13권2호
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    • pp.117-125
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    • 2009
  • Phenylformamidine계 유도체들은 곤충의 신경전달 물질인 octopamine과 경쟁적으로 octopamine receptor에 작용하여 살충 활성을 나타낸다. 불소를 함유한 4-fluoro-2-methylaniline과 2-fluoro-4-methylaniline을 트리에틸오르토포메이트와 반응시켜 얻은 중간체 formimidate(1)을 마이크로웨이브 조건하에서 반응시켜 짧은 반응시간 내에서 높은 수율로 새로운 화합물인 다양한 N', N'-fluorophenylformamidine 유도체들을 합성하였으며 이들 화합물의 복숭아 흑진딧물, 배추좀나방, 점박이응애, 그리고 벼멸구 등에 대한 살충활성을 시험하였다. 2-I-a, 2-I-c, 2-I-d, 2-II-d 화합물들이 응에류와 멸구유에 좋은 살충활성을 보여주었다.

왕겨 바이오차와 유기농자재 혼합에 따른 주요 양분 용출 모델 적용 및 N2O 배출량 산정 (Application of major plant nutrient releasing model and N2O emissions to the leachate from the mixtures of rice hull biochar and organic fertilizer materials)

  • 이동건;최재이;심창기;남주희;윤석인;송종석;박도균;신중두
    • 유기물자원화
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    • 제31권3호
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    • pp.43-53
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    • 2023
  • This batch experiment evaluated the impacts of major plant nutrient releases by applying the modified Hyperbola model on the leachates and N2O emissions from incorporated rice hull biochar with organic fertilizer materials. The treatments consisted of the control as incorporated with organic fertilizer materials, the incorporated rice hull biochar with organic fertilizer materials, and the incorporated plasma-activated rice hull biochar with organic fertilizer materials under redox conditions. The results indicated that the maximum release amount of NH4-N was 3486.3 mg L-1 in the control, and their reduction rates of NH4-N, NO3-N, PO4-P, and K were 8.0%, 17.5% 44.3.0% and 8.7%, respectively, relative to the control. In the control, the highest soluble amount of PO4-P was 681.0 mg L-1. The estimations for accumulated NH4-N, NO3-N, PO4-P, and K-releases in all the treatments were significantly (p<0.01) fitted with a modified Hyperbola model. For greenhouse gas emissions, the lowest cumulative N2O was 340.4 mg kg-1 in the soil incorporated with plasma-activated rice hull biochar, and the reduction rates were 27.8% and 86.4% in the rice hull biochar and plasma-activated rice hull biochar treatments, respectively, compared to the control. Therefore, it concluded that the incorporated rice hull biochar can be especially useful for controlling PO4-P release and N2O emissions for bio-fertilizer applications.

유기질 비료의 사용에 따른 맥문동 생육 및 수량 (Effects of Organic Fertilizers on Growth and Yield in Liriope platyphylla WANG et TANG)

  • 이충열;김용철;최인수;민경갑;성재덕;김성만
    • 한국약용작물학회지
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    • 제15권3호
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    • pp.148-151
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    • 2007
  • 1. 맥문동 괴근크기별 전체 괴근수는 각 처리별로 약간 차이를 보이나 주당 50개에서 58개 사이로 형성 되었고, 그 중 2cm이상 가장 많이 형성된 처리는 3.5소 +두엄 +유박 +계분 +초목회 처리구였다. 2. 괴근 심도 조사를 보면 0${\sim}$20cm사이에 가장 많이 분포한 처리구는 3요소 +두엄이며, 21 ${\cdot}$ 30cm 이상에 가장 많이 분포한 구는 3요소 +두엄 +유박 +계분 +초목회 처리구 였다. 3. 건근수량은 3요소 +두엄 +유박 + 계분 +초목회 처리구에서 414kg/10a로 가장 많았고, 그 다음은 3요소 +두엄 +유박 + 계분 +초목회 처리구 이며, 3요소 +두엄의 관행 보다 34%, 25%의 수량을 높일 수 있었다.

유기 전기 발광 소자에서 $\alpha$-septithiophene을 이용한 buffer layer의 영향 (The effects of buffer layer using $\alpha$-septithiophene on the organic light emitting diode)

  • 이기욱;임성택;신동명;박종욱;박호철
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 춘계학술대회 논문집 디스플레이 광소자 분야
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    • pp.53-56
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    • 2002
  • The effect of $\alpha$-septithiophene (${\alpha}-7T$) layers on the organic light emitting diode(OLED) was studied. The ${\alpha}-7T$ was used for a buffer layer in OLED. Hole injection was investigated and improved emission efficiency. The OLEDs structure can be described as indium tin oxide(ITO)/ buffer layer / hole transporting layer / emitting layer / electron transporting layer / LiF / Al. The hole transporting layer were composed of N,N-diphenyl-N,N-di(3-methylphenyl)-1,1-biphenyl-4,4-diamine(TPD), and N,N-di(naphthalene-1-ly)-N,N-diphenyl-benzidine( ${\alpha}$-NPD). The emitting layer, and electron transporting layer consist of tris(8-hydroxyquinolinato) aluminum($Alq_3$). All organic layer were deposited at a background pressure of less than $10^{-6}$ torr using ultra high vacuum (UHV) system. The ${\alpha}-7T$ layer can substitute the hole blocking layer, and improve hole injection properties.

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Improved Efficiency of Organic Light-Emitting Diodes with Doped Transporting Layer

  • Seo, Ji-Hyun;Park, Jung-Hyun;Kim, Jun-Ho;Seo, Ji-Hoon;Hyung, Gun-Woo;Kim, Young-Kwan
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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    • pp.1464-1466
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    • 2007
  • We demonstrate p-doped organic light emitting diodes (OLEDs) comprising tungsten oxide ($WO_3$) and 1,4-bis[N-(1-naphthyl)-N'-phenylamino]-4,4' diamine (NPB). We propose the NPB : $WO_3$ composition functions as a p-doping layer which significantly improves hole injection that leads to the fabrication of 4-(dicyano-methylene)-2-methyl-6-(p-dimethylaminos tyryl)-4H-pyrane (DCMl) based p-doped OLEDs with high efficiency and long lifetime.

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