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| Registros recuperados: 60 | |
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| Wallander, Steven; Claassen, Roger; Nickerson, Cynthia J.. |
| The recent 9-billion-gallon increase in corn-based ethanol production, which resulted from a combination of rising gasoline prices and a suite of Federal bioenergy policies, provides evidence of how farmers altered their land-use decisions in response to increased demand for corn. As some forecasts had suggested, corn acreage increased mostly on farms that previously specialized in soybeans. Other farms, however, offset this shift by expanding soybean production. Farm-level data reveal that the simultaneous net expansion of corn and soybean acreage resulted from a reduction in cotton acreage, a shift from uncultivated hay to cropland, and the expansion of double cropping (consecutively producing two crops of either like or unlike commodities on the same... |
| Tipo: Report |
Palavras-chave: Agricultural Resource Management Survey (ARMS); Bioenergy; Ethanol; Indirect effects; Land use; Corn production; Environmental impacts; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/117982 |
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| Smith,Ana K. de G.; Alesi,Letícia S.; Varanda,Luciano D.; Silva,Diego A. da; Santos,Luis R. O.; Yamaji,Fábio M.. |
| ABSTRACT The search for new alternatives in order to reuse residues is one way to minimize environmental impacts by promoting sustainable practices. This study analyzed the technical feasibility of briquettes production from urban pruning residue and sugarcane bagasse, turning them into a product with higher added value besides directing their use and reducing their improper disposal. Five treatments were studied from different ratios of the two residues: T1, T2, T3, T4 and T5, respectively made of 100% of urban pruning; 50% urban pruning and 50% sugarcane bagasse; 25% urban pruning and 75% sugarcane bagasse; 10% urban pruning and 90% sugarcane bagasse; 100% sugarcane bagasse. The materials were characterized physically, chemically and energetically.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; Biomass; Reusing waste. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200138 |
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| Silva,Jorge Alberto Gonçalves da; Costa,Paulo Mafra de Almeida; Marconi,Thiago Gibbin; Barreto,Everton Jean da Silva; Solís-Gracia,Nora; Park,Jon-Won; Glynn,Neil Charles. |
| ABSTRACT: Among the species related to sugarcane, Saccharum spontaneum (L.) is a wild species with the greatest potential as a source of genetic variation to cope with biomass production in harsh environments. Due to its high yield, early vigor, ratooning ability, low input requirements and tolerance to various biotic and abiotic stresses, sugarcane breeders have shown interest in its contribution, as a donor of genes, to the development of high biomass energy canes. The conservation, evaluation and utilization of the genetic variability of S. spontaneum available in germplasm collections are critical for breeding, but, given the aggressive rhizomatous growth habit and the ability to propagate via seed dispersal, S. spontaneum is classified as a noxious... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Molecular markers; Yield; Bioenergy; Abiotic stress; Core collection. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000400329 |
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| Velázquez-Martí,Borja; Fernández-González,Elena; Callejón-Ferre,Ángel Jesús; Estornell-Cremades,Javier. |
| This study evaluates the technology and work systems used in order to harvest residual biomass from pruning in the specific conditions of Mediterranean fruit orchards (narrow distances between crop-rows). Harvesting has been divided into several types of operations - pruning, biomass alignment between crop tracks, biomass concentration in piles, chipping and bundling - which have been analyzed in five Mediterranean cultivations for three years. Altogether, three types of pruning have been analyzed: Manual, previous mechanical followed by manual, and fully mechanical; Two types of alignment: Manual and mechanical; Three concentration systems: Manual, tractor with a rake and a forwarder; Four chipping work organization systems: chipper driven inside orchard... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Logistic biomass; Pruning; Bioenergy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000300002 |
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| Silva, Gutierres Nelson; Grossi, José Antônio Saraiva; Carvalho, Marcela Silva; Kuki, Kacilda Naomi; Goulart, Samuel de Melo; Pimentel, Leonardo Duarte. |
| Macauba fruits are oil-rich drupes with high moisture content at harvest. This feature can affect the chemical properties of the oil and increase the costs of biodiesel production. Therefore, it is necessary to adopt postharvest strategies to ensure oil quality. The aim of this work was to evaluate the effect of drying macauba fruit on the quality of the pulp oil. Husked and dehusked fruits were dried at 60°C and then stored. At 0, 15, 45, 100, and 180 days after storage, fruit samples were retrieved, and the oil from the pulp was evaluated for physicochemical parameters. The removal of the husk from the fruits considerably reduced the drying time compared to that of the husked fruits. Drying prevented deterioration of the fruit even after 180 days of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrocomia aculeata; Post-harvest; Storage; Bioenergy; Armazenamento de Produtos Agrícolas. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/43451 |
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| Chandra, Ram; Takeuchi, H.; Hasegawa, T.; Vijay, V. K.. |
| This paper examines the effect of particle sizes in substrates on methane production yields of wheat and rice straw biomass without any other applied pretreatment. Anaerobic digestion of three different mean particle size (MPS) substrate of 1.5 mm, 0.75 mm, and 0.30 mm of wheat and rice straw biomass was carried out at 37 oC mesophilic temperature. The observed result revealed that mean particle size of 0.30 mm, and 0.75 mm had increased methane production yield by 4.7%, and 38.7%, respectively, compared to 1.50 mm particle size of wheat straw. However, in case of rice straw substrates the methane production yield was found 7.9%, and 13.0% higher, respectively, for mean particle size of 0.30 mm, and 0.75 mm, compared to 1.50 mm particle size. Mean particle... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; Biogas production from lignocellulosic biomass wheat and rice straw; Biomass particle size; Anaerobic digestion; Methane yield. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2844 |
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| Andrea, M. C. S.; Tieppo, R. C.; Gimenez, L. M.; Povh, F. P.; Katsman, T. J.; Romanelli, T. L.. |
| Energy flow analysis is an interesting approach to assess and to improve sustainability of agricultural production systems, represented by the economy of energy resources and other inputs translated into energy terms. This type of analysis can complement the economic view contributing to more efficient production systems. Moreover, assessing crops with traditional food use may play an important role in energy provision. Energy efficiency tools were applied in order to determine the energy demand as well as the efficiency of the biomass production of several forage crops in mechanized systems conducted at Paraná state, Brazil. Material flow, input and output energy, energy balance, energy return over investment and embodied energy were used and identified... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; Energy indicators; Sustainability; Embodied energy. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2916 |
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| Tieppo, R. C.; Andrea, M. C. S.; Gimenez, L. M.; Romanelli, T. L.. |
| Sugarcane production system is in transition, mainly due to its harvesting process. Harvest through burning has been gradually replaced by mechanized processes, providing another by-product to be explored: sugarcane trash. In Brazil, through of the sugarcane trash, São Paulo state itself produces around 210.4 million BOE – barrel of oil equivalent (1,251,952 TJ ), which could supply consumers through cogeneration or for further second generation ethanol. For the sugarcane trash to be collected, mechanized processes are required, such as windrowing, gathering, and transporting. In agricultural production systems, embodied energy is affected by the mechanization level. In order to assess environmental performance by the energy point-of-view, analysis of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Material flow; Mechanized harvest; Bioenergy; Biofuel. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2913 |
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| RODRIGUES,CARLA K.; LOPES,EDUARDO S.; FIGUEIREDO FILHO,AFONSO; PELISSARI,ALLAN L.; SILVA,MATHEUS K.C.. |
| Abstract: The lack of accurate models for estimating residual biomass in wood harvesting operations results in underutilization of this co-product by forestry companies. Due to the lack of this information, forestry operations planning, such as chipping and transport logistics, are influenced, with a consequent increase in costs. Thereby, the aim of this study was to propose and evaluate statistical models to estimate residual biomass of Eucalyptus sp. in wood harvesting operations by means of tree variables measured from harvester processing head. Generalized linear models were composed through stepwise procedure for estimating residual biomass by tree covariates: diameter at breast height, commercial height, commercial limit diameter, and stem commercial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; Full-tree harvesting method; Forest measurement; Forest planning.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700867 |
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| Todd,James Ryan; Sandhu,Hardey; Binder,Joe; Arundale,Rebecca; Gordon,Vanessa; Song,Jian; Glaz,Barry; Wang,Jianping. |
| ABSTRACT The world collection of sugarcane (Saccharum hybrids. and related grasses (WCSRG) is an important source of genes for sugarcane and energycane breeding. The core collection or diversity panel of the WCSRG was created in Canal Point with 300 accession and 10 checks to evaluate its diversity. The fiber components of the species and accessions within the WCSRG are unknown, so a shredded and dried fiber sample was taken from each accession and sent for fiber analysis. The acetyl groups, acid insoluble lignin, acid soluble lignin, arabinan, glucan, holocellulose, total lignin, structural ash, and xylan were quantified on a % fiber basis and nonstructural ash on a % total basis. There were significant, but not large differences between species for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofuel; Bioenergy; Miscanthus; Erianthus; Biomass. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100048 |
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| Pierri,Letícia de; Pauletti,Volnei; Barth,Gabriel; Motta,Antônio Carlos Vargas; Silva,Dimas Agostinho da; Roza,Luciano Antunes da; Saudade,Cesar Augusto Schmid. |
| ABSTRACT Residual biomass from grains has potential as an energetic source. Biomass composition determines this potential and is related to plant nutrition, which may vary according to soil fertility. The aim of this 23-year field study was to evaluate changes in chemical attributes of a Brazilian Oxisol and in the energetic potential of oat (Avena sativa L.) and soybean (Glycine max (L.) Merr) residual biomasses provided by tillage systems and fertilizer rates. The trial was performed since 1989, assessing soil chemical attributes in no-tillage (NT), conventional (CT), minimum (MT) and no-tillage plus chisel plough (NT+CP), with two fertilizer rates (normal and reduced, since 1994). Oat and soybean (2012/2013) residual biomasses were collected and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; No-tillage; Fertilization; Avena sativa L.; Glycine max (L.) Merr. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300454 |
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| Moreno,Giovane; Santos,Viviane Taisa; Albrecht,Leandro Paiola; Cesco,Victor Salomão. |
| ABSTRACT In Brazil, there are several crops producing oil for biofuel production, such as canola, sunflower, peanut, cotton, castor bean, soybean, among others. There are parameters that indicate the energetic and economic viability for the production of biofuels, and that can be applied, for example, in transgenic soybeans. The present study aimed to evaluate the energetic viability of Intacta RR2 PROTM soybean for biofuel production.Experiments were conducted in the municipalities of Palotina and Marechal Cândido Rondon, both in the State of Paraná. Energy balance calculations were carried out from the production system, estimating energy expenditure, including the agricultural and industrial stages. The inputs used were considered as input of energy,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Bioenergy; Biotechnology; Energy generation; Socioeconomic evaluation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000200229 |
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| Montico,Sergio. |
| Bioenergy is a renewable source of primary energy and its sustainable use is an advantage to the current global energy crisis. The use of vegetable resources for energy purposes requires specific studies of the impacts that might occur to the economy and the environment. The province of Santa Fe (Argentina) has an agroproductive structure capable of providing biomass for its processing and production of energy. The objective of this work was to value the capacity of this province for bioenergy production from grains transformation into biofuels and the biomass energy from crop straw, and speculates on the impact on soils from removed crop residues. Crop residues of the ten most important grain and oilseed crops (15.2x10(6) Mg year-1) and bioethanol and... |
| Tipo: Journal article |
Palavras-chave: Biofuels; Bioenergy; Crops residues; Sustainability. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000300013 |
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| Brighenti,Alexandre Magno; Calsavara,Leonardo Henrique Ferreira; Varotto,Yago Vieira Guerra. |
| ABSTRACT Elephant grass (Pennisetum purpureum Schum.) is an important forage crop that has been proposed as a potential feedstock for bioenergy production. However, weed interference is a major factor limiting elephant grass production. Field experiments were conducted in 2014 and 2015 to evaluate preemergence herbicides for selective weed control in an elephant grass pasture. Herbicide treatments included atrazine + S-metolachlor, atrazine + simazine, ametryn, ethoxysulfuron, S-metolachlor, diuron + hexazinone, sulfentrazone, imazethapyr, and atrazine at label use rates. Weedy and weed-free treatments were included. Atrazine + S-metolachlor, atrazine + simazine, ametryn, ethoxysulfuron, S-metolachlor, sulfentrazone, and atrazine did not cause... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; Biofuel; Napier grass; Forage; Pennisetum purpureum. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100052 |
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| Registros recuperados: 60 | |
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