Energy Crops for Sustainable Bioethanol Production; Which, Where and How?

Hattori, Tomokazu; Morita, Shigenori

doi:10.1626/pps.13.221

Cited by 91 publications

(50 citation statements)

References 47 publications

(62 reference statements)

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“…As a C4 plant, it shows an impressive absorption of CO2 during its fast growth in 4-5 months [9][10][11]. The US, Brazil, Germany, India, and China have already produced ethanol from sweet sorghum, although the production is limited as compared to cassava, maize, and sugarcane [12,13]. It is well adapted to various types of soils and provides high production biomass production [14].…”

Section: Introductionmentioning

confidence: 99%

Influence of Sowing Times, Densities, and Soils to Biomass and Ethanol Yield of Sweet Sorghum

Xuan

Phuong²,

Khang³

et al. 2015

Sustainability

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Abstract:The use of biofuels helps to reduce the dependency on fossil fuels and therefore decreases CO2 emission. Ethanol mixed with gasoline in mandatory percentages has been used in many countries. However, production of ethanol mainly depends on food crops, commonly associated with problems such as governmental policies and social controversies. Sweet sorghum (Sorghum bicolor (L.) Moench) is one of the most potential and appropriate alternative crops for biofuel production because of its high biomass and sugar content, strong tolerance to environmental stress conditions and diseases, and wide adaptability to various soils and climates. The aim of this study was to select prospective varieties of sweet sorghum, optimum sowing times and densities to achieve high yields of ethanol production and to establish stable operational conditions in cultivating this crop. The summer-autumn cropping season combined with the sowing densities of 8.3-10.9 plant m −2

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Section: Introductionmentioning

confidence: 99%

Influence of Sowing Times, Densities, and Soils to Biomass and Ethanol Yield of Sweet Sorghum

Xuan

Phuong²,

Khang³

et al. 2015

Sustainability

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“…In comparison, cellulosic bioethanol produced from non-edible plants reduces potential food-fuel competition and, as such, is receiving increasing attention; hence, if such plants are grown on marginal non-arable lands, farmland soils are not required [1]. However, questions have been raised regarding the sustainability of material plant production [2].…”

Section: Introductionmentioning

confidence: 99%

“…Within the framework of a project to select suitable bioenergy plants for cultivation in tropical and sub-tropical regions of Asia, our research group selected Erianthus arundinaceus (Erianthus) and Pennisetum purpureum (Napier grass) as raw materials for cellulosic bioethanol on the basis of their large shoot biomass and high tolerance to biotic and abiotic stresses [1,3,4]. However, published information about the root system of these 2 species is limited.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Quantity of Root Systems of Field-Grown Erianthus and Napier Grass

Sekiya¹,

Shiotsu²,

Abe³

et al. 2013

AJPS

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Cellulosic bioethanol produced from non-edible plants reduces potential food-fuel competition and, as such, is receiving increasing attention. In the raw material production of cellulosic bioethanol, the aboveground biomass of plants is entirely harvested; consequently, the plant roots represent the major source of organic matter incorporated into the soil. We selected Erianthus and Napier grass as the raw materials for cultivation in Asia. However, information about whether these 2 species provide sufficient root volume to sustain soil fertility is limited. Therefore, we examined the spatial distribution of the roots of these 2 plants, and quantified root mass and length. Erianthus and Napier grass were either grown in fields or greenhouses in Tokyo (Japan) and Lampung (Indonesia), and then their roots were exposed from adjacent soil profiles. Both species developed large, deep roots, penetrating 2.0 -2.6 m deep into the soil. Root depth indexes showed that the roots of both species penetrated much deeper into the soil compared to monocot crop species, being more comparable to dicot species. Erianthus developed a root mass and length of 384 -850 g·m −2 and 28.8 -35.8 km·m , respectively. These values exceeded the maximum values previously recorded for common crop species. Our study confirmed that Erianthus and Napier grass develop deep root systems, with substantially large biomass; hence, we suggest that both plants supply root biomass in large quantities, representing possible major sources of soil organic matter.

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“…and higher energy efficiency (the ratio between the entire energy content of biomass yield and the energy utilized in the cropping system) (Cosentino, Copani, Patanè, Mantineo, & D'Agosta, 2008). At the same time, faba bean cover cropping, can assist in enhancing the maize bioethanol production system Net Energy Balance via enhancing NUE and N-Rf (Hattori & Morita, 2010), but even more notably, also allows the exploitation of maize crop residues for bioethanol production, without environmental risks. It is known that the utilization of crop residues should be carefully considered because they are well known to be important to maintain sustainability of crop production through prevention of soil degradation, improvement of soil water balance, maintenance of soil organic carbon content (e.g.…”

Section: Seed Yield and N Availabilitymentioning

confidence: 99%

Maize Biomass Production, N-Use Efficiency and Potential Bioethanol Yield, Under Different Cover Cropping Managements, Nitrogen Influxes and Soil Types, in Mediterranean Climate

Beslemes¹,

Tigka²,

Efthimiadis³

et al. 2013

JAS

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To evaluate the effect of cover cropping faba bean with maize, compared to maize monocrop cultivation, on yield (dry matter), nitrogen utilization efficiency (NUE) and N fertilizer recovery fraction of maize, field experiments were carried out over a period of three years. Experimental sites were located in central Greece, on a fertile, clayey soil and on a sandy soil of moderate fertility, A factorial combination of four nitrogen dressings (0, 80, 160, 240 kg ha -1 ) and three legume treatments (incorporated into the topsoil or harvested before the sowing of maize and mono-cropping) were tested in a split plot design in three blocks. Results showed a substantial importance of the legume cover crop for both soil types, for all studied factors. Maize total dry biomass yield fluctuated from 13.4 to 20.3 Mg ha -1 for the control plots, from 15.1 to 21.6 Mg ha -1 when faba bean was harvested and from 15.3 to 22.4 Mg ha -1 when incorporated, for clayey soil and from 12.4 to 16.9 Mg ha -1 for the control plots, from 14.9 to 19.4 Mg ha -1 when faba bean was harvested and from 14.5 to 19.6 Mg ha -1 when incorporated, for sandy soil. The NUE was estimated at 56 kg kg -1 and 55 kg kg -1 for clayey and sandy soil, respectively. The N recovery fraction was enhanced by 10-15% after faba bean cover cropping, for both soil types. Such systems should be seriously considered in future land use planning, with respect to the sustainable cultivation of maize.

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Energy Crops for Sustainable Bioethanol Production; Which, Where and How?

Cited by 91 publications

References 47 publications

Influence of Sowing Times, Densities, and Soils to Biomass and Ethanol Yield of Sweet Sorghum

Influence of Sowing Times, Densities, and Soils to Biomass and Ethanol Yield of Sweet Sorghum

Distribution and Quantity of Root Systems of Field-Grown Erianthus and Napier Grass

Maize Biomass Production, N-Use Efficiency and Potential Bioethanol Yield, Under Different Cover Cropping Managements, Nitrogen Influxes and Soil Types, in Mediterranean Climate

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