Energy efficiency in maize crops in different regions of Brazil

Autores/as

DOI:

https://doi.org/10.5433/1679-0359.2021v42n4p2271

Palabras clave:

Energy consumption, Grain yield, Zea mays.

Resumen

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.

Biografía del autor/a

Roni Fernandes Guareschi, Universidade Federal Rural do Rio de Janeiro

Postdoctoral, Graduate Program in Soil Science, Universidade Federal Rural do Rio de Janeiro, UFRRJ, Seropédica, RJ, Brazil.

Elderson Pereira da Silva, Universidade Federal Rural do Rio de Janeiro

Student of Master's Degree Course, Graduate Program in Phytotechnics, UFRRJ, Seropédica, RJ, Brazil.

Segundo Urquiaga, Empresa Brasileira de Pesquisa Agropecuária

Researcher, Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA Agrobiologia, CNPAB, Seropédica, RJ, Brazil.

Bruno José Rodrigues Alves, Empresa Brasileira de Pesquisa Agropecuária

Researcher, Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA Agrobiologia, CNPAB, Seropédica, RJ, Brazil.

Robert Michael Boddey, Empresa Brasileira de Pesquisa Agropecuária

Researcher, Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA Agrobiologia, CNPAB, Seropédica, RJ, Brazil.

Leonardo Fernandes Sarkis, Universidade Federal de Lavras

Student of Master's Degree Course, Graduate Program in Soil Science, Universidade Federal de Lavras, UFLA, Lavras, MG, Brazil.

Claudia Pozzi Jantalia, Empresa Brasileira de Pesquisa Agropecuária

Researcher, Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA Agrobiologia, CNPAB, Seropédica, RJ, Brazil.

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Publicado

2021-05-20

Cómo citar

Guareschi, R. F., Silva, E. P. da, Urquiaga, S., Alves, B. J. R., Boddey, R. M., Sarkis, L. F., & Jantalia, C. P. (2021). Energy efficiency in maize crops in different regions of Brazil. Semina: Ciências Agrárias, 42(4), 2271–2292. https://doi.org/10.5433/1679-0359.2021v42n4p2271

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