• Title/Summary/Keyword: 억새

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Studies on the Relationship between Standing Crop of Miscanthus sinensis Grassland and Soil Morphological Characteristics (억새초지의 현존량과 토양의 형태적 특성에 관한 연구)

  • 박봉규
    • Journal of Plant Biology
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    • v.21 no.1_4
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    • pp.7-12
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    • 1978
  • The results of the relationship between standing crop of Miscanthus sinensis grassland and soil morphological characteristics are as follows. The Miscanthus sinensis grassland seems to grow well in volcainc ash soil. The depth of A layer was closely related to the standing crop of the Miscanthus sinensis grassland. The root systems of Miscanthus sinensis reached to its maximum in A layer. The root systems of Miscanthus sinensis showed its maximum at 20mm and below(soil hardness). The soil texture of A layer showed SL-SiL. The soil structure of A layer contained Massive-Small Granular. The soil colors of A layer expressed Dark Yellowish Orange-Brownish Black.

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Community Structure and Soil Properties of Grassland in the Vicinity of Yoch’on Industrial Complex (여천공단 주변 초지군락의 구조와 토양 특성)

  • 류재근;이종영;이윤영;문형태
    • Korean Journal of Environmental Biology
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    • v.17 no.4
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    • pp.421-426
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    • 1999
  • Species composition, species diversity, standing biomass and soil properties of the grasslands, which are developed in the vicinity of Yoch’on Industrial Complex, were investigated. The grassland divided into three types, mugwort (Artemisia princeps var. orientalis) community, porkweed (Phytolacca americana) community and eulalia (Miscanthus sinensis) community by physiognomy Standing biomass of mugwort community, porkweed community and eulalia community was 5,645 g/$m^2$, 2,827 g/$m^2$ and 9,048 g/$m^2$, respectively. Species diversity of mugwort community, porkweed community and eulalia community was 1.03, 0.54 and 0.26, respectively. Total N, available P, total S and soluble S of the top soil in this grassland were much higher than those in other areas. Most of the species in this grassland are indicator species of soil eutrophication.

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Combined Aqueous Ammonia-Dilute Sulfuric Acid Pretreatment of Miscanthus for Bioethanol Production (바이오에탄올 제조를 위한 억새의 암모니아-희황산 복합 전처리)

  • Bark, Surn-Teh;Koo, Bon-Cheol;Choi, Yong-Hwan;Moon, Youn-Ho;Ahn, Seung-Hyun;Cha, Young-Lok;Kim, Jung Kon;An, Gi Hong;Suh, Sae-Jung;Park, Don-Hee
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.05a
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    • pp.179.1-179.1
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    • 2011
  • Pretreatment of cellulosic biomass is necessary before enzymatic saccharification and fermentation. The objective of this study was to evaluate the effect of combined aqueous ammonia-dilute sulfuric acid treatment on cellulosic biomass. Miscanthus was pretreated using aqueous ammonia and dilute sulfuric acid solution under high temperature and pressure conditions to be converted into bioethanol. Aqueous ammonia treatment was performed with 15 %(w/w) ammonia solution at $150^{\circ}C$ of reaction temperature and 20 minutes of reaction time. And then, dilute sulfuric acid treatment was performed with 1.0 %(w/w) sulfuric acid solution at $150^{\circ}C$ of reaction temperature and 10 minutes of reaction time. The compositional variations of this combined aqueous ammonia-dilute sulfuric acid treatment resulted in 68.0 % of cellulose recovery and 95.7 % of hemicellulose, 81.3 % of lignin, 89.1 % of ash removal respectively. The enzymatic digestibility of 90.5 % was recorded in the combined pretreated Miscanthus sample and it was 14.7 times higher than the untreated sample. The ethanol yield in the Simultaneous Saccharification and Fermentation was 90.4 % of maximum theoretical yield based on cellulose content of the combined pretreated sample and it was about 98 % compared to the ${\alpha}$-cellulose ethanol yield.

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A Phytosiciological Study of the Shrubby and Herbaceous Vegetation of the Riverside in the Upper Stream of Nak-dong River, Korea (낙동간 상류부의 하천변 관목 및 초본성 식생의 식물사회학적 연구)

  • 송종석
    • Korean Journal of Environment and Ecology
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    • v.15 no.2
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    • pp.104-117
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    • 2001
  • 경상북도 낙동상 상류부에 위치한 하천변 식물군락에 대해 식물사회적 조사를 하였다. 그 결과 아래처럼 10군강에 속하는 30군락단위와 상급단위 미결정의 1군락단위를 식별하였다. 특히, 과거에 인위적 영향을 반영하여 쑥군강에 속하는 군집 군락이 가장 많이 출현하였다. A. 관목식물군락-A-1나도버들군장, 버드나무군단: 버드나무-왕버들군집, 버드나무군집, 시무나무군집, 갯버들군집, 눈갯버들군집, 선버들군집, A-2 찔레꽃 군강: 국수나무군락, 구기자나무군락: A-3 상급단위 미결정의 군락: 누리장나무군락; B, 초본식물군락 B-1 가래군강: 노랑어리연꽃군집, 마름군락, B-2 좀개구리밥군강: 좀 개구리밥-개구리밥군랍, B-3 가막사리군강: 고마리군집, 미꾸라지낚시-여뀌군집, 개기장-여뀌군집, B-4 갈대군강; 창포군집, 갈풀-미나리군집, 달뿌리풀군집, 물억새군집, 갈대군락, B-5 쑥군강:물쑥군집, 쑥군락, 물봉선군락, 왕고들빼기-환삼덩굴군집, 칡-환삼덩굴군집, 수크려군랑, B-6 명아주군강: 물피군락, 바랭이군란, 큰개여뀌군락, B-7 억새군강: 억새군락, B-8 질경이군강: 비노리-질경이군락, 이들 식생단위는 거의가 일본의 것과 공통하고 있어 한국에 고유한 하천변 식생은 매우 드물다는 사실을 나타내었다. 한편 하천에는 고유한 군강의 군집, 군락은 하류에서 상류로 감에 따라 양적으로 증가 하였으마, 귀화식물의 수는 그 반대였다. 또, 각 군락과 환경과의 관계, 하천변 식생의 복원생태 및 자연보호 등에 관해 상세히 논하였다.

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Studies on the Fermentative Utilization of Cellulosic Wastes (Part 7) Culture of Cellulolytic Bacteria from Miscanthus (폐섬유자원의 발효공학적 이용에 관한 연구 (제7보) 억새풀을 기쇄로 한 섬유소 자화세균의 배양)

  • 성낙기;윤한대;심기환;이천수
    • Microbiology and Biotechnology Letters
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    • v.5 no.3
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    • pp.127-131
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    • 1977
  • Various kinds of native herbage grasses like-Miscanthus sinensis, Arundinella hirta, Cymbopogen geirngii, Themeda japonica etc. are widely distributed in every Korean mountain. So we investigated the availability of native grass, Miscanthus sinensis as a substrate for the production of S. C. P. The results were obtained as follows. 1) At the alkali treatment, NaOH was the most effective with the exclusion of lignin, and pretreated Miscanthus with NaOH appeared to be a good substrate for the microbial growth. 2) When Miscanthus was treated with one to 10% NaOH, the microbial growth increased in proportion to the increased alkali concentration. Beyond 4% NaOH, a slight increase was observed. 3) Phosphoric acid, as a neutralizer, was the most effective in cell production after alkali treatment. 4) On the effect of incubation time, the productivity was best found at 60 hours, and the cell weight was 9.23 mg per 1 ml, and the microbial digestibility of substrate was 75.2%.

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