• Journal of the Korean Society of Environmental Restoration Technology
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• v.2 no.2
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• pp.70-77
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• 1999

This study was carried out to suggest an effective method for the rehabilitation of Close-to-Nature River and artificial wetland. The results on the revegetation methods by seeding and sodding of Phragmites japonica, Miscanthus sacchariflorus, Themeda triandra, and Pennisetum alopecuroides were summarized as follows. Seed germination of Phragmites japonica was 76.3% at $30^{\circ}C$, that of Miscanthus sacchariflorus was 68.7% at $20^{\circ}C$, that of Themeda triandra germinated 52.3% at $25^{\circ}C$, $30^{\circ}C$ constant temperature and that of Pennisetum alopecuroides germinated 86.7% at $30^{\circ}C/20^{\circ}C$ alternating temperature. Seed germination of Pennisetum alopecuroides exceeded 80% at $20^{\circ}C$, $25^{\circ}C$, $30^{\circ}C$ constant temperature and $25^{\circ}C/15^{\circ}C$ alternating temperature. At 60 days after seeding, the ground coverage of Phragmites japonica, Miscanthus sacchariflorus, Themeda triandra, and Pennisetum alopecuroides reached 81%, 81 %, 74%, and 86% respectively in the soil media of vermiculite and peatmoss(1 : 1 by volume). In the results of sod experiment, Phragmites japonica, Miscanthus sacchariflorus, Themeda triandra, and Pennisetum alopecuroides were formed sod completely in soil composition type of vermiculite and peatmoss(1 : 1, v/v). Thus this media seems to be best sad production media for rehabilitation works of Close-to-Nature River and man-made wetlands. Phragmites japonica and Miscanthus sacchariflorus were not significantly different in shoot height and the number of tillers by different planting distance for the first one year of experiment. Pennisetum alopecuroides shows high possibility to be used for Close-to-Nature River rehabilitation works by seeding.

• Weed & Turfgrass Science
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• v.7 no.1
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• pp.22-34
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• 2018

Miscanthus has been considered as the most promising bioenergy crop for lignocellulosic biomass production. In Korea, M. sacchariflorus and M. sinensis can be found easily in all regions. It is a great advantage to utilize as important species with respect to genetic and cross-breeding programs materials for creation of novel hybrids. For successful breeding programs, it is important to precisely understand the variability of morphological and growth characteristics among Miscanthus species as breeding parent materials. In this study, morphological and growth characteristics were observed in 960 germplasms of two Miscanthus species (M. sacchariflorus and M. sinensis) for growing seasons over three years. Due to the inherent characteristics of these species, the germplasm of M. sacchariflorus among the collected germplasm were reduced in plant height than in the collection area. In M. sinensis, the plant height of germplasm collected mainly from Jeju-do increased more than those collected from collection area. Sixty-one of the collected 960 germplasms were selected and investigated to the morphological characteristics. Based on the investigated morphological data, the phylogenic tree was developed. As the results, it was confirmed that there exist germplasm in which the characteristics of M. sacchariflorus and M. sinensis are mixed. This study of Miscanthus may provide an important information in order to expedite the introduction as breeding materials for creation of new hybrid.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.107.2-107.2
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• 2011

억새는 척박한 토양 조건에서도 쉽게 자라며 관리가 용이하다는 장점이 있어 바이오에너지 작물로 주목을 받고 있다. 억새는 주로 Miscanthus sacchariflorus(물억새)와 Miscanthus sinensis(참억새) 그리고 두 억새의 잡종인 Miscanthus giganteus로 구분되며, 최근 기존의 억새보다 생체량을 크게 늘린 거대억새가 개발되기도 하였다. 본 실험에서는 우리나라 전역에서 가장 흔하게 볼 수 있는 물억새와 참억새를 유동층 반응기를 이용하여 급속열분해 하였다. 본 연구의 목적은 억새로부터 얻은 바이오원유와 나무로부터 얻은 바이오원유의 특성을 비교하고, 시료투입속도의 변화를 주어 억새로부터 얻은 바이오원유의 수율과 특성을 알아보고자 함이다. 시료의 투입속도는 200g/h, 300g/h, 500g/h, 1000g/h로 변화를 주었으며, 반응온도($500^{\circ}C$), 공탑속도(0.19m/s), 응축기온도($10^{\circ}C$)는 매 실험마다 동일하게 유지하였다. 수집한 바이오원유는 공업분석을 통해 연료로서의 가치를 알아보았다. 목재를 급속열분해 한 경우 바이오원유의 수율은 56.03wt.%로 동일한 조건에서 억새를 급속열분해 한 경우 보다 약 6wt.%가량 높았다. 바이오원유의 발열량은 큰 차이가 없었으나 수분과 점도에서 큰 차이를 보였다. 투입속도가 증가할수록 바이오원유의 수율은 증가하는 경향을 보였으며, 시간당 1000g을 투입하였을 때는 수율이 감소하였으나 수율의 변화는 크지 않았다. 투입속도가 증가하는 경우 바이오원유의 고위발열량과 점도는 감소하고 수분이 증가하는 경향을 보였다.

• Journal of Biosystems Engineering
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• v.40 no.3
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• pp.296-304
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• 2015

Purpose: The balance between miscanthus production and its cost effectiveness depends greatly on its moisture content during post processing. The objective of this research was to measure the moisture content using a non-destructive and non-contact methodology for in situ applications. Methods: The moisture content of comminuted miscanthus was controlled using a closed chamber, a humidifier, a precision weigher, and a real-time monitoring software developed in this research. A CMOS sensor equipped with $50{\times}$ magnifier lens was used to capture magnified images of the conditioned materials with moisture content level from 5 to 30%. The hypothesis is that when light is incident on the comminuted particles in an inclined manner, higher moisture content results in light being reflected with a higher intensity. Results: A linear regression analysis for an initiative hypothesis based on general histogram analysis yielded insufficient correlations with low significance level (<0.31) for the determination coefficient. A significant relationship (94% confidence level) was determined at level 108 in a reverse accumulative histogram proposed based on a revised hypothesis. A linear regression model with the value at level 108 in the reverse accumulative histogram for a magnified image as the independent variable and the moisture content of comminuted miscanthus as the dependent variable was proposed as the estimation model. The calibrated linear regression model with a slope of 92.054 and an offset of 32.752 yielded 0.94 for the determination coefficient (RMSE = 0.2%). The validation test showed a significant relationship at the 74% confidence level with RMSE 6.4% (n = 36). Conclusions: To compensate the inconsistent significance between calibration and validation, an estimation model robust against various systematic interferences is necessary. The economic efficiency of miscanthus, which is a promising energy resource, can be improved by the real-time measurement of its crucial material properties.

• Journal of the Korean Wood Science and Technology
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• v.40 no.1
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• pp.38-43
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• 2012

Sound absorption capability and mechanical properties such as MOE and MOR in bending of miscanthus particle based board were estimated by the two microphone transfer function method and three point bending method, respectively. The results are summarized as follows: The sound absorption coefficients of miscanthus particle based board was higher than those of commercial gypsum board which is well used as sound absorbing barrier. The MOR and MOE of miscanthus particle based board increased with increasing of board density. The sound absorption coefficients of miscanthus particle based board were 50~80% in the frequency range of about 1~2.5 Khz. In entire frequency range, those value increased with target board density decreasing.

• Journal of The Korean Society of Grassland and Forage Science
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• v.4 no.2
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• pp.122-126
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• 1983

The allocation of the dry-matter yield in Miscanthus sineusis grasslands on soils of different water contents was investigated. The results obtained in this study can be summarized as follows; 1. The standing crops of Miscanthus sineusis grassland A (soil water content; 22.54%) and B (soil water content; 9.22%) were 2,267.12 and 943.44 g/m$^{2}$, respectively. 2. The productivity curves of the Miscanthus sineusis grassland A and B were the bell-shape and the productivity peak values were showed in September. 3. In Miscanthus sineusis grassland A and B, the reproductive allocation was represented by characteristics of production structure and dry-matter yields. 4. Allocation rates of dry-matter yields to panicle and rhizomes in Miscanthus sineusis grassland A and B were 0.6 and 1.4% and 35.4 and 46.6% respectively. 5. In these results, allocation of dry-matter yield to reproductive organs was increased in the condition of water-stress.

• Journal of Microbiology and Biotechnology
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• v.33 no.10
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• pp.1384-1389
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• 2023

This work aimed to evaluate the feasibility of biohydrogen production from Barley Straw and Miscanthus. The primary obstacle in plant biomass decomposition is the recalcitrance of the biomass itself. Plant cell walls consist of cellulose, hemicellulose, and lignin, which make the plant robust to decomposition. However, the hyperthermophilic bacterium, Caldicellulosiruptor bescii, can efficiently utilize lignocellulosic feedstocks (Barley Straw and Miscanthus) for energy production, and C. bescii can now be metabolically engineered or isolated to produce more hydrogen and other biochemicals. In the present study, two strains, C. bescii JWCB001 (wild-type) and JWCB018 (ΔpyrFA Δldh ΔcbeI), were tested for their ability to increase hydrogen production from Barley Straw and Miscanthus. The JWCB018 resulted in a redirection of carbon and electron (carried by NADH) flow from lactate production to acetate and hydrogen production. JWCB018 produced ~54% and 63% more acetate and hydrogen from Barley Straw, respectively than its wild-type counterpart, JWCB001. Also, 25% more hydrogen from Miscanthus was obtained by the JWCB018 strain with 33% more acetate relative to JWCB001. It was supported that the engineered C. bescii, such as the JWCB018, can be a parental strain to get more hydrogen and other biochemicals from various biomass.

• Journal of the Korean Institute of Landscape Architecture
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• v.44 no.4
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• pp.1-13
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• 2016

To detail a picture of the economic value of Miscanthus landscape conservation in terms of cultural services aspects of Ecosystem Services, Sunghaksan(Mt.), Hwawangsan(Mt.) and Jaeyaksan(Mt.), which are known for their Miscanthus colonies, were chosen as survey sites. After examining the willingness to pay for the value of Miscanthus landscape conservation by targeting of visitors each study area, the economic value of Miscanthus landscape conservation per capita aspects was evaluated using Contingent Valuation Methods(CVM) from the collected willingness to pay for economic value of Miscanthus scenery by site. After using the target Chi-square test to analyze the differences among each site, the correlation between specific variables was investigated. Willingness to pay for the Miscanthus landscape conservation was found to increase as the respondents' income became higher. The more environmental conservation efforts were being made in their daily life, the higher willingness to pay was for Miscanthus landscape conservation. Likewise in other studies, the higher the bid was, the less willingness to pay was. The per capita assessment of the Miscanthus landscape value of the logit models in the dual estimated using the factor extracted with each of the injected variable bounds was estimated for Seunghaksan (\38,277), Hwawangsan(\38,648), and Jaeyaksan(\48,891). The average of the three sites was estimated to be \38,679. Assessment of the economic value of these Miscanthus landscape sites saw high willingness to pay by visitors when compared to the current market price inflation, such as watching movies or amusement park admission, which could mean that visitors recognize the value of ecosystem services from nature in evaluating the Miscanthus landscape.

• Korean Journal of Weed Science
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• v.30 no.4
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• pp.330-339
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• 2010

In order to suggest correct direction of researches on Miscanthus spp. which are promising bioenergy crop, authors had reviewed and summarized various literature about botanical taxonomy, morphology and present condition of breeding, cultivation and utilization of miscanthus. Among the genus of Miscanthus which are known 17 species, the most important species are M. sinensis and M. sacchariflorus which origin are East Asia including Korea, and M. x giganteus which is inter-specific hybrid of tetraploid M. sacchariflorus and diploid M. sinensis. Miscanthus is superior to other energy crops in resistance to poor environments including cold, saline and damp soil, nitrogen utilization efficiency, budget of input energy and carbon which are required for producing biomass and output which are stored in biomass. The major species for production of energy and industrial products including construction material in Europe, USA and Canada is M. x giganteus which was introduced from Japan in 1930s. In present, many breeding programs are conducted to supplement demerits of present varieties and to develop "Miscanes" which is hybrid of miscanthus and sugar cane. In Korea, the researches on breeding and cultivation of miscanthus were initiated in 2007 by collecting germplasms, and developed "Goedae-Uksae 1" which is high biomass yield and "mass propagation method of miscanthus" which can improve propagation efficiency in 2009. In order to develop "Korean miscanthus industry" in future, the superior varieties available not only domestic but also foreign market should be developed by new breeding method including molecular markers. Researches on production process of cellulosic bio-ethanol including pre-treatment and saccharification of miscanthus biomass also should be strengthen.

• Korean Journal of Plant Resources
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• v.24 no.5
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• pp.628-635
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• 2011

This study was conducted to establish the tissue culture system for Korean domestic Miscanthus sinensis, which is used in various purposes such as forage, and bio-energy resources. With the mature seed of Miscanthus, optimum concentrations of plant growth regulators were identified for an efficient callus induction and regeneration. Among the treatments of 1~10 $mg{\cdot}L^{-1}$ 2,4-D, IBA, or NAA, callus induction rate was highest (85.3%) on MS medium containing 5 $mg{\cdot}L^{-1}$ 2,4-D. Under the condition, the callus were efficiently induced and proliferated with comparably lower frequencies of callus browning. In shoot regeneration, the treatment of NAA combined with BAP seemed to contribute more efficient conditions to shoot regeneration than those of NAA with Kinetin or 2-iP. Especially, regeneration efficiency and number of regenerated plants were 83.7% and 5.5 in 3 $mg{\cdot}L^{-1}$ NAA with 5 $mg{\cdot}L^{-1}$ BAP, respectively, which were higher frequencies than those in NAA with Kinetin or 2-iP. In results, 5 $mg{\cdot}L^{-1}$ 2,4-D and 3 $mg{\cdot}L^{-1}$ NAA combined with 5 $mg{\cdot}L^{-1}$ BAP were efficient for embryogenic callus induction and regeneration of Miscanthus. This system would be useful for mass-propagation and developing new cultivars via tissue culture of Miscanthus sinensis.