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| Morais,Rafael Fiusa de; Souza,Bruno Juscelino de; Leite,José Marcos; Soares,Luis Henrique de Barros; Alves,Bruno José Rodrigues; Boddey,Robert Michael; Urquiaga,Segundo. |
| The objective of this work was to evaluate elephant grass (Pennisetum purpureum Schum.) genotypes for bioenergy production by direct biomass combustion. Five elephant grass genotypes grown in two different soil types, both of low fertility, were evaluated. The experiment was carried out at Embrapa Agrobiologia field station in Seropédica, RJ, Brazil. The design was in randomized complete blocks, with split plots and four replicates. The genotypes studied were Cameroon, Bag 02, Gramafante, Roxo and CNPGL F06-3. Evaluations were made for biomass production, total biomass nitrogen, biomass nitrogen from biological fixation, carbon/nitrogen and stem/leaf ratios, and contents of fiber, lignin, cellulose and ash. The dry matter yields ranged from 45 to 67 Mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum purpureum; Ash; Agroenergy; Biological nitrogen fixation; Genotype; Lignin. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000200004 |
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| Dalla Marta, Anna; DIPSA-University of Firenze; anna.dallamarta@unifi.it; Natali, Francesca; DIPSA-University of Firenze;; Mancini, Marco; DIPSA-University of Firenze;; Ferrise, Roberto; DIPSA-University of Firenze;; Bindi, Marco; DIPSA-University of Firenze;; Orlandini, Simone; DIPSA-University of Firenze;. |
| The contribution of agrobiomasses, as a source of energy, to the reduction of greenhouse gas emissions was confirmed by several studies. Biomass from agriculture represents one of the larger and more diverse sources to exploit and in particular ethanol and diesel have the potential to be a sustainable replacement for fossil fuels, mainly for transport purposes. However, the cultivation of energy crops dedicated to the production of biofuels presents some potential problems, e.g., competitiveness with food crops, water needs, use of fertilizers, etc., and the economic, energy, and environmental convenience of such activity depends on accurate evaluations about the global efficiency of the production system. In this study, the processes related to the... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Agroenergy; Bioethanol; Energy balance; Pure vegetable oil; Water balance. |
| Ano: 2011 |
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| Reis,Edésio Fialho dos; Pinto,Jefferson Fernando Naves; Assunção,Hildeu Ferreira da; Silva,Danielle Fabíola Pereira da. |
| Abstract: The objective of this work was to evaluate the genetic diversity of macaúba (Acrocomia aculeata) accessions from 35 municipalities of the state of Goiás, Brazil, in order to obtain information about the genetic variability and to provide subsidies for the commercial deployment of the culture in the Midwestern region of Brazil. The bunches were harvested with ripe fruits. The following were evaluated: fruit and almond lengths and diameters; the weights of fruits and almonds; the average number of almonds, as well as the oil contents in the almond and in the dehydrated fruit. The parameters that indicated significant contributions to the variability were fruit weight, fruit width, fruit length, and oil content in the almond. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrocomia aculeata; Agroenergy; Almond quality; Biodiesel; Divergence; Oleaginous seed. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000400277 |
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| Cortez,Jorge W.; Guimarães,Camila C.; dos Santos,Vivianni M. L.. |
| ABSTRACT The use of alternative fuels in diesel engines has been the subject of research that seeks new fuels to expand the energy matrix. The aim of this study was to evaluate the performance of the stationary engine with the use of mixtures of biodiesel from soybean and castor bean added to diesel (S500) in two proportions (25% and 40%), evaluating the torque, effective power observed and specific consumption. The five biodiesel mixtures of soybean (S) and castor bean (C) analyzed were: S100C0, S75C25, S50C50, S25C75 and S0C100, which were added to the diesel in proportions B25 and B40, totaling ten treatments, plus the control with diesel S500 (B7). The stationary engine was subjected to the rotations of 3000, 2700, 2400, 2100, 1800 and 1500 rpm. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroenergy; Diesel engine; Biodiesel/diesel mixtures; Oleaginous; Engine rotation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600918 |
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| Júnnyor,Wellingthon da Silva Guimarães; Severiano,Eduardo da Costa; Silva,Alessandro Guerra da; Gonçalves,Wainer Gomes; Andrade,Renata; Martins,Brendow Roberto Rodrigues; Custódio,Guilherme Dias. |
| ABSTRACT Increasing attention has recently been given to sweet sorghum as a renewable raw material for ethanol production, mainly because its cultivation can be fully mechanized. However, the intensive use of agricultural machinery causes soil structural degradation, especially when performed under inadequate conditions of soil moisture. The aims of this study were to evaluate the physical quality of aLatossolo Vermelho Distroférrico (Oxisol) under compaction and its components on sweet sorghum yield forsecond cropsowing in the Brazilian Cerrado (Brazilian tropical savanna). The experiment was conducted in a randomized block design, in a split plot arrangement, with four replications. Five levels of soil compaction were tested from the passing of a tractor... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorghum bicolor (L.); Sowing time; Soil structure; Water limitation; Least limiting water range; Agroenergy. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601744 |
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