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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
09/11/2021 |
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Data da última atualização: |
09/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GUARESCH, R. F.; SILVA, E. P. da; URQUIAGA, S.; ALVES, B. J. R.; BODDEY, R. M.; SARKIS, L. F.; JANTALIA, C. P. |
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Afiliação: |
RONI FERNANDES GUARESCHI, UFRRJ; ELDERSON PEREIRA DA SILVA, UFRRJ; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; BRUNO JOSE RODRIGUES ALVES, CNPAB; ROBERT MICHAEL BODDEY, CNPAB; LEONARDO FERNANDES SARKIS, UFRRJ; CLAUDIA POZZI JANTALIA, CNPAB. |
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Título: |
Energy efficiency in maize crops in different regions of Brazil. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Semina: Ciências Agrárias, v. 42, n. 4, p. 2271-2292, 2021. |
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DOI: |
10.5433/1679-0359.2021v42n4p2271 |
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Idioma: |
Inglês |
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Conteúdo: |
Assessment of energy efficiency (EE) enables the evaluation of the sustainability of agrosystems, as well as decision-making regarding reduction in production costs and environmental pollution and even to increase production in a sustainable way. In this context, the objective of this study was to assess energy efficiency in maize in different regions of Brazil. For this purpose, 32 areas of maize crop distributed across the major producing states and regions were assessed. Energy inputs and outputs of agricultural operations and/or agricultural inputs were calculated by multiplying the amount used by their calorific value or energy coefficient at each stage of production. Energy efficiency was calculated as the ratio between the total output energy and the total input energy during the production process. For every megajoule (MJ) of energy consumed in the production of second-crop maize and first-crop maize seasons, 9.9 and 8.7 MJ respectively of renewable energy were produced in the form of grain. In both maize cropping seasons, most of the energy use was attributed to fertilizers, herbicides and fuel. To be representative the evaluation of energy efficiency of the maize crop should be performed in different Brazilian cultivation regions, as it will represent different edaphoclimatic and management conditions spread over the national territory within an agricultural year. |
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Palavras-Chave: |
Brazilian territory; Energy consumption. |
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Thesagro: |
Zea Mays. |
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Thesaurus Nal: |
Grain yield. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/227577/1/Energy-efficiency-in-maize-crops-in-different-regions-of-Brazil.pdf
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Marc: |
LEADER 02133naa a2200253 a 4500
001 2135963
005 2021-11-09
008 2021 bl uuuu u00u1 u #d
024 7 $a10.5433/1679-0359.2021v42n4p2271$2DOI
100 1 $aGUARESCH, R. F.
245 $aEnergy efficiency in maize crops in different regions of Brazil.$h[electronic resource]
260 $c2021
520 $aAssessment of energy efficiency (EE) enables the evaluation of the sustainability of agrosystems, as well as decision-making regarding reduction in production costs and environmental pollution and even to increase production in a sustainable way. In this context, the objective of this study was to assess energy efficiency in maize in different regions of Brazil. For this purpose, 32 areas of maize crop distributed across the major producing states and regions were assessed. Energy inputs and outputs of agricultural operations and/or agricultural inputs were calculated by multiplying the amount used by their calorific value or energy coefficient at each stage of production. Energy efficiency was calculated as the ratio between the total output energy and the total input energy during the production process. For every megajoule (MJ) of energy consumed in the production of second-crop maize and first-crop maize seasons, 9.9 and 8.7 MJ respectively of renewable energy were produced in the form of grain. In both maize cropping seasons, most of the energy use was attributed to fertilizers, herbicides and fuel. To be representative the evaluation of energy efficiency of the maize crop should be performed in different Brazilian cultivation regions, as it will represent different edaphoclimatic and management conditions spread over the national territory within an agricultural year.
650 $aGrain yield
650 $aZea Mays
653 $aBrazilian territory
653 $aEnergy consumption
700 1 $aSILVA, E. P. da
700 1 $aURQUIAGA, S.
700 1 $aALVES, B. J. R.
700 1 $aBODDEY, R. M.
700 1 $aSARKIS, L. F.
700 1 $aJANTALIA, C. P.
773 $tSemina: Ciências Agrárias$gv. 42, n. 4, p. 2271-2292, 2021.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
13/09/2018 |
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Data da última atualização: |
18/08/2020 |
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Autoria: |
BRIENZA JUNIOR, S.; YARED, J. A. G. |
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Afiliação: |
SILVIO BRIENZA JUNIOR, CPATU; JORGE ALBERTO GAZEL YARED, CPATU. |
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Título: |
Agroforestry systems as an ecological approach in the Brazilian Amazon development. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Belém, PA: EMBRAPA-CPATU, 1989. |
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Páginas: |
10 p. |
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Idioma: |
Inglês |
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Notas: |
Trabalho a ser apresentado na "International Conference on Agroforestry: Principles and practice", University of Edinburg, Edinburg, 24-29 July, 1989. |
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Conteúdo: |
This paper discusses EMBRAPA'S agroforestry systems experience in the Brasilia Amazon. The forestry species and fruit tress introduced in shifting systems had great success, particularly the wood-producing species Cordia goeldiana and Swietenia macrophylla and fruit trees Musa spp. and Theobroma grandiflorum. In forestry plantations, Vigna unguiculata was mixed with the trees C. goeldiana, Jacaranda copaia and Bagassa guianensis in the first two years to reduce cost of investment and cultural treatment. In this case, Vigna unguiculata did not affect survival of trees and increased tree height and diameter growth. The introduction of wood-producing trees in livestock pastures can represent formation of a system more balanced and stable through nutrient cycling than is possible today. A silvopastorial system has been carrid out in the Paragominas regional (Pará) using the forestry species Eucalyptus tereticornis, B. guianensis and Schizolobium amazonicum, the crop Zea mays and forage species Brachiaria brizantha, B. humidicola and Panicum maximum. Performance of the forestry and forage species has been satisfactory and the corn yield was more than the rebional average. The cattle, at a low stocking rate, graze on the site and cause no harm to the plantet trees. |
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Palavras-Chave: |
Agrofloresta; Agroforestry systems; Brasil; Sistema silvipastoril. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/182860/1/Agroforestry-systems.pdf
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Marc: |
LEADER 01998nam a2200205 a 4500
001 2095604
005 2020-08-18
008 1989 bl uuuu u00u1 u #d
100 1 $aBRIENZA JUNIOR, S.
245 $aAgroforestry systems as an ecological approach in the Brazilian Amazon development.$h[electronic resource]
260 $aBelém, PA: EMBRAPA-CPATU$c1989
300 $a10 p.
500 $aTrabalho a ser apresentado na "International Conference on Agroforestry: Principles and practice", University of Edinburg, Edinburg, 24-29 July, 1989.
520 $aThis paper discusses EMBRAPA'S agroforestry systems experience in the Brasilia Amazon. The forestry species and fruit tress introduced in shifting systems had great success, particularly the wood-producing species Cordia goeldiana and Swietenia macrophylla and fruit trees Musa spp. and Theobroma grandiflorum. In forestry plantations, Vigna unguiculata was mixed with the trees C. goeldiana, Jacaranda copaia and Bagassa guianensis in the first two years to reduce cost of investment and cultural treatment. In this case, Vigna unguiculata did not affect survival of trees and increased tree height and diameter growth. The introduction of wood-producing trees in livestock pastures can represent formation of a system more balanced and stable through nutrient cycling than is possible today. A silvopastorial system has been carrid out in the Paragominas regional (Pará) using the forestry species Eucalyptus tereticornis, B. guianensis and Schizolobium amazonicum, the crop Zea mays and forage species Brachiaria brizantha, B. humidicola and Panicum maximum. Performance of the forestry and forage species has been satisfactory and the corn yield was more than the rebional average. The cattle, at a low stocking rate, graze on the site and cause no harm to the plantet trees.
650 $aAmazonia
653 $aAgrofloresta
653 $aAgroforestry systems
653 $aBrasil
653 $aSistema silvipastoril
700 1 $aYARED, J. A. G.
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Embrapa Amazônia Oriental (CPATU) |
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