Estudo energético da produção de biocombustível a partir do milho

Salla, Diones Assis; Furlaneto, Fernanda de Paiva Badiz; Cabello, Cláudio; Kanthack, Ricardo Augusto Dias

doi:10.1590/s0103-84782010005000142

Cited by 15 publications

(11 citation statements)

References 5 publications

(2 reference statements)

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“…The cultural input of the system under high technological level was significantly higher than that observed in other systems (Table 1). According to SALLA et al (2010a), a conventional corn production has cultural inputs of 15,633.7MJ ha -1 higher than the value of the system discussed, due to the addition of transport in the technical itinerary. In a corn crop under direct seeding, MELO et al (2007), even including transport to the technical itinerary, found a lower value (11,270.23 and 13,771.95MJ ha -1 for two consecutive yields).…”

Section: Resultsmentioning

confidence: 98%

“…The application of non-renewable energy was lower than the application of biological energy (Table 3), representing 28.46% of total energy expenditure. According to SALLA et al (2010a), the adoption of alternative techniques of production, such as direct seeding, the use of renewable fuels in industrial and production systems, and the use of organic fertilizers can minimize the energy expenditure used in the production of corn. CAMPOS et al (2009) also highlights the need for new technological models that replace the use of fossil fuels, capable of providing to humans the comfort generated by mechanization and increased agricultural productivity and also the viability of sustainability in agriculture, by the use of renewable resources.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, castor beans, under conventional cultivation, presented the highest energy expenditure during the preparation of the soil (CHECHETTO et al 2010). SALLA et al (2010a) reported that the most representative items of the technical itinerary in the production of corn under a conventional management were the inputs, with 77.5% of total cultural inputs. Adding up the energy expenditure with seeds, fertilizers, herbicides and insecticides in this study, a similar value is found, with 70.61% of cultural inputs.…”

Section: Resultsmentioning

confidence: 99%

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Energetic analysis of landrace varieties and hybrids of corn produced in different technological levels of management

Araújo¹,

Brandão²,

Colen³

2013

Eng. Agríc.

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The aim of this study was to analyze, under the energetic point of view, the cultivation of corn in three management systems (low, medium and high-tech), using two landrace varieties ('Argentino' and 'BR da Várzea'), a double hybrid cultivar (SHS 4080) and a simple hybrid (IAC 8333). Five performance indicators were used: energy efficiency, liquid cultural energy, cultural efficiency, energy balance and productive energy efficiency. From the perspective of family farming, it was verified the largest social importance of the systems under low and medium levels of technology, due to the increase employment capacity of rural labor. The liquid cultural energy and energy balance were more favorable for the system under high technological level, unlike cultural efficiency and productive energy efficiency, which were significantly higher for medium and low technological levels. The variety 'Argentino' showed lower productive energy efficiency. The variety 'BR da Várzea', on the other hand, presented the potential to generate energy as much as the hybrids. In general, the biggest sustainability in the corn crop was achieved when the management system under medium and lower levels of technology were used.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Energetic analysis of landrace varieties and hybrids of corn produced in different technological levels of management

Araújo¹,

Brandão²,

Colen³

2013

Eng. Agríc.

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“…Balanço energético no sistema misto de produção com integração lavoura-pecuária, rotação pasto/lavoura S3P e rotação lavoura/pasto S3L, com preparo convencional do solo (PC) e em sistema plantio direto (PD), entre 1991-2010, em experimento da Embrapa Cerrados, Planaltina, DF. (Salla et al, 2010). Em geral, os resultados de balanço energético obtidos no presente estudo foram favoráveis aos biocombustíveis produzidos em todos os sistemas, especialmente o bioetanol.…”

Section: Resultsunclassified

Balanço energético da produção de grãos, carne e biocombustíveis em sistemas especializados e mistos

Sá

Urquiaga

Jantalia

et al. 2013

Pesq. agropec. bras.

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Resumo -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, avaliaramse: 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.Termos para indexação: bioenergia, eficiência energética, integração lavoura-pecuária, pastagem, produção sustentável de alimentos. Energy balance for the production of grain, meat, and biofuel in specialized and mixed agrosystemsAbstract -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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“…This is mainly because maize's energy use in Brazil is still not a significant reality (SALLA et al, 2010) as well as energy use analysis isusually not considered as often as management decisions.At world level, there is a greater quantity of such energy approach studies, especially because maize is the main source of ethanol in USA (GRASSINI; CASSMAN, 2012;MÉJEAN;HOPE, 2010;SHAPOURI, 2004).…”

Section: Introductionmentioning

confidence: 99%

Model-based approach for maize yield gap analysis related to climate variability and nitrogen management

Andréa¹

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Estudo energético da produção de biocombustível a partir do milho

Cited by 15 publications

References 5 publications

Energetic analysis of landrace varieties and hybrids of corn produced in different technological levels of management

Energetic analysis of landrace varieties and hybrids of corn produced in different technological levels of management

Balanço energético da produção de grãos, carne e biocombustíveis em sistemas especializados e mistos

Model-based approach for maize yield gap analysis related to climate variability and nitrogen management

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