Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/15179 |
Resumo: | The objective of this work was to evaluate the energetic efficiency of mixed and specialized production systems of grain and meat, and the energy balance in bioenergy production. Agronomic data from 20‑year farming with specialized and mixed agrosystems were used. As specialized agricultural systems, the following ones were evaluated: grass pasture; grass with legume pasture; and continuous grain production under no tillage or conventional plough tillage. As a mixed system, the integrated crop‑livestock was evaluated under no tillage or conventional plough tillage. The agricultural activity were considered energy input, while grain yield and meat production the energy output. The agricultural products obtained in mixed systems showed energy balance and total production of renewable energy equivalent to the those yielded by the specialized systems. The energy balance of soybean biofuel showed positive values both in mixed and in specialized systems regardless of the soil tillage managements. Among the analyzed soybean and maize biofuels, the greatest energy balance was observed in maize bioethanol. The biofuels produced in all production systems show a positive energy balance and can be considered energetically sustainable. |
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Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystemsBalanço energético da produção de grãos, carne e biocombustíveis em sistemas especializados e mistosbioenergy; energy efficiency; crop‑livestock integration; pasture; sustainable food productionbioenergia; eficiência energética; integração lavoura‑pecuária; pastagem; produção sustentável de alimentosThe objective of this work was to evaluate the energetic efficiency of mixed and specialized production systems of grain and meat, and the energy balance in bioenergy production. Agronomic data from 20‑year farming with specialized and mixed agrosystems were used. As specialized agricultural systems, the following ones were evaluated: grass pasture; grass with legume pasture; and continuous grain production under no tillage or conventional plough tillage. As a mixed system, the integrated crop‑livestock was evaluated under no tillage or conventional plough tillage. The agricultural activity were considered energy input, while grain yield and meat production the energy output. The agricultural products obtained in mixed systems showed energy balance and total production of renewable energy equivalent to the those yielded by the specialized systems. The energy balance of soybean biofuel showed positive values both in mixed and in specialized systems regardless of the soil tillage managements. Among the analyzed soybean and maize biofuels, the greatest energy balance was observed in maize bioethanol. The biofuels produced in all production systems show a positive energy balance and can be considered energetically sustainable.O objetivo deste trabalho foi avaliar a eficiência energética de sistemas especializados e mistos de produção de grãos e carne e o balanço energético na produção de bioenergia. Foram avaliados dados de 20 anos de cultivo com sistemas agrícolas especializados e mistos. Como sistemas agrícolas especializados, avaliaram-se: a pastagem de gramínea; a pastagem de gramínea consorciada com leguminosa; e a produção de grãos em sistema plantio direto ou em sistema convencional de preparo do solo. Como sistema misto, considerou-se a integração lavoura‑pecuária em dois sistemas de manejo. Os insumos utilizados foram considerados como o ingresso energético, enquanto a produção de grãos e carne, as saídas de energia. Os produtos agrícolas nos sistemas mistos apresentaram balanço energético e produção absoluta de energia renovável compatíveis com aqueles produzidos em sistemas especializados. O balanço energético do biocombustível de soja apresentou valores positivos tanto em sistemas mistos como especializados, independentemente do sistema de preparo do solo. Entre os biocombustíveis de soja e milho analisados, o maior balanço energético foi observado no bioetanol produzido com milho. Os biocombustíveis produzidos em todos os sistemas apresentam balanço energético positivo e podem ser considerados energeticamente sustentáveis.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCNPq, FAPERJ, EmbrapaSá, Jerusa Maia eUrquiaga, SegundoJantalia, Cláudia PozziSoares, Luis Henrique de BarrosAlves, Bruno José RodriguesBoddey, Robert MichaelMarchão, Robélio LeandroVilela, Lourival2013-12-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15179Pesquisa Agropecuaria Brasileira; v.48, n.10, out. 2013; 1323-1331Pesquisa Agropecuária Brasileira; v.48, n.10, out. 2013; 1323-13311678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/15179/12444https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/15179/9941info:eu-repo/semantics/openAccess2014-03-13T19:14:53Zoai:ojs.seer.sct.embrapa.br:article/15179Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-03-13T19:14:53Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems Balanço energético da produção de grãos, carne e biocombustíveis em sistemas especializados e mistos |
title |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems |
spellingShingle |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems Sá, Jerusa Maia e bioenergy; energy efficiency; crop‑livestock integration; pasture; sustainable food production bioenergia; eficiência energética; integração lavoura‑pecuária; pastagem; produção sustentável de alimentos |
title_short |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems |
title_full |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems |
title_fullStr |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems |
title_full_unstemmed |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems |
title_sort |
Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystems |
author |
Sá, Jerusa Maia e |
author_facet |
Sá, Jerusa Maia e Urquiaga, Segundo Jantalia, Cláudia Pozzi Soares, Luis Henrique de Barros Alves, Bruno José Rodrigues Boddey, Robert Michael Marchão, Robélio Leandro Vilela, Lourival |
author_role |
author |
author2 |
Urquiaga, Segundo Jantalia, Cláudia Pozzi Soares, Luis Henrique de Barros Alves, Bruno José Rodrigues Boddey, Robert Michael Marchão, Robélio Leandro Vilela, Lourival |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
CNPq, FAPERJ, Embrapa |
dc.contributor.author.fl_str_mv |
Sá, Jerusa Maia e Urquiaga, Segundo Jantalia, Cláudia Pozzi Soares, Luis Henrique de Barros Alves, Bruno José Rodrigues Boddey, Robert Michael Marchão, Robélio Leandro Vilela, Lourival |
dc.subject.por.fl_str_mv |
bioenergy; energy efficiency; crop‑livestock integration; pasture; sustainable food production bioenergia; eficiência energética; integração lavoura‑pecuária; pastagem; produção sustentável de alimentos |
topic |
bioenergy; energy efficiency; crop‑livestock integration; pasture; sustainable food production bioenergia; eficiência energética; integração lavoura‑pecuária; pastagem; produção sustentável de alimentos |
description |
The objective of this work was to evaluate the energetic efficiency of mixed and specialized production systems of grain and meat, and the energy balance in bioenergy production. Agronomic data from 20‑year farming with specialized and mixed agrosystems were used. As specialized agricultural systems, the following ones were evaluated: grass pasture; grass with legume pasture; and continuous grain production under no tillage or conventional plough tillage. As a mixed system, the integrated crop‑livestock was evaluated under no tillage or conventional plough tillage. The agricultural activity were considered energy input, while grain yield and meat production the energy output. The agricultural products obtained in mixed systems showed energy balance and total production of renewable energy equivalent to the those yielded by the specialized systems. The energy balance of soybean biofuel showed positive values both in mixed and in specialized systems regardless of the soil tillage managements. Among the analyzed soybean and maize biofuels, the greatest energy balance was observed in maize bioethanol. The biofuels produced in all production systems show a positive energy balance and can be considered energetically sustainable. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-12-20 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15179 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/15179 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15179/12444 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/15179/9941 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.48, n.10, out. 2013; 1323-1331 Pesquisa Agropecuária Brasileira; v.48, n.10, out. 2013; 1323-1331 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416687694905344 |