Data/hora: 01/06/2024 02:45:44

Provedor de dados: | 65
País: | Brazil
Título: | Energy flows in lowland soybean production system in Brazil
Autores: | Andrea,Maria Carolina da Silva; Romanelli,Thiago Libório; Molin,José Paulo.
Data: | 2016-08-01
Ano: | 2016
Palavras-chave: | Glycine max (L.) Merr; Material flow; Energy balance; EROI.
Resumo: | ABSTRACT: Soybean is the main product of Brazilian agribusiness, both production and income. Considering the increase in food and energy demand and the search for more sustainable production systems, this study aimed to analyze inputs and energy use of a possible area of expansion of soybean production: a system under sub irrigation management located in a lowland area of Cerrado biome, northern region of Brazil. Its environmental performance was compared to other Brazilian locations among them traditionally soybean producers. The evaluation and comparison was made through material and energy flow tools in order to determine the inputs embodied per area, as well as energy demand, availability and efficiency in the analyzed production system. Energy demand (IE) and energy availability (OE) of the analyzed production system were 7.6 and 57.1 GJ ha-1, respectively. Energy balance (EB) was 49,5 GJ ha-1, energy return over investment (EROI) was 7.5 and embodied energy in grains (EE) was 2,2 MJ kg-1, respectively. Highest energy consumption was due to the use of fertilizers, fuel and herbicide. The system is energy efficient, since it provides more energy than demands, and efficient when compared to usual production systems in other regions, however it is highly dependent on non-renewable energy.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000801395
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20151298
Formato: | text/html
Fonte: | Ciência Rural  v.46 n.8 2016
Fonte: | info:eu-repo/semantics/openAccess