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	Provedor de dados REA (2) CIGR Journal (1) Autor Bueno,Osmar de C. (1) Cavalaris, C. (1) Fornazier,Maurício J. (1) Fountas, S. (1) Gemtos, T. A. (1) Loreto,Maria Das D. S. de (1) Martins,Gilberto (1) Masera,Omar (1) Muner,Lúcio H. de (1) Perin,Márcio L. (1) Souza,Cássio V. de (1) Tagarakis, A. (1) Mais... Palavra-chave Energy analysis (3) Agricultural engineering rape seed (1) Agroecosystem (1) Coffee (1) Crop yield (1) Energy efficiency coefficient (1) Integrated agroecosystems (1) Net energy (1) Pig farming (1) Sunflower (1) Sustainability (1) Sweet sorghum (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2015 (1) 2013 (1) 2012 (1) País Brazil (2) China (1) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Energy analysis of three energy crops in Greece CIGR Journal Gemtos, T. A.; Cavalaris, C.; Tagarakis, A.; Fountas, S.. To assess the potential of energy crops to provide a stock material for biofuel production three crops (rapeseed, sunflower and sweet sorghum) were studied in field experiments in Thessaly, Central Greece in 2007 and 2008.  The cropping activities were recorded.  Energy analysis was carried out to assess benefits from the crops.  Power requirements and energy consumption during field operations were measured directly using instrumented tractors.  Literature data was used for the energy sequestered to the inputs of the system (indirect energy).  Energy budgets were produced taking into account as output either the seed or including the stalks for the two oil seed crops.  The results showed that in all cases positive energy balances were achieved.  Analysis... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering rape seed; Sunflower; Sweet sorghum; Energy analysis; Net energy; Energy efficiency coefficient. Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2244 Simulation of the energy performance of maize production integrated to pig farming REA Perin,Márcio L.; Martins,Gilberto; Bueno,Osmar de C.. The study evaluated the energy performance of pig farming integrated with maize production in mechanized no-tillage system. In this proposed conception of integration, the swine excrement is used as fertilizers in the maize crop. The system was designed involving the activities associated to the pig management and maize production (soil management, cultivation and harvest). A one-year period of analysis was considered, enabling the production of three batches of pigs and two crops of maize. To evaluate the energy performance, three indicators were created: energy efficiency, use of non-renewable resources efficiency and cost of non-renewable energy to produce protein. The energy inputs are composed by the inputs and infrastructure used by the breeding of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pig farming; Integrated agroecosystems; Energy analysis. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500004 Energetic sustainability of three arabica coffee growing systems used by family farming units in Espírito Santo state REA Muner,Lúcio H. de; Masera,Omar; Fornazier,Maurício J.; Souza,Cássio V. de; Loreto,Maria Das D. S. de. Three growing systems of Arabica coffee were evaluated under the energy perspective, in the state of Espírito Santo in Brazil. The systems are conventional cultivation (CC), cultivation with good agricultural practices (CGP) and organic farming (OF). It was made a comparison of the energy flows within these three systems to show sustainable levels of each one based on production average data of several family-farming units. Therefore, we analyzed crop yield, total energy efficiency reverse (TEER), energy efficiency of ripe coffee (EERC) and non-renewable energy efficiency (NREE). OF system had values for TEER, EERC and NREE of 3.3 4.7 and 7.9 respectively. Yet CC showed values of 1.8, 1.9 and 1.6 for TEER, EERC and NREE respectively. Furthermore, CGP... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroecosystem; Energy analysis; Coffee; Crop yield; Sustainability. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300397 Registros recuperados: 3 Primeira ... 1 ... Última

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