Efeito de práticas culturais na conversão e no balanço energéticos

Santos, H. P. dos; Tomm, G. O.; Spera, S. T.; Ávila, Alexandre

doi:10.1590/s0006-87052007000200014

Cited by 11 publications

(11 citation statements)

References 10 publications

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“…In comparative studies, corn, along with sorghum, has shown higher energy efficiency than other grain producing species, such as soybeans, wheat, white oat and common vetch (SANTOS et al 2007). …”

Section: Resultsmentioning

confidence: 99%

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: 99%

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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“…SANTOS et al 2007 determined EB and EROI when comparing tillage practices in soybean system in RS state. The Table 2 -Share of each input in total energy demand in the soybean systems.…”

Section: Discussionmentioning

confidence: 99%

Energy flows in lowland soybean production system in Brazil

2016

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“…The literature presents a wide variation in the values of EE for soybean crops cultivated in Brazil. For example, several EE values have been reported for soybean crops: 5.47 (Melo et al, 2007); 18,64 (A. T. Campos, Klosowsk, Souza, Zanini, & Prestes, 2009); 7.81 (Assenheimer, Campos, & Gonçalves, 2009); 4.27 (Mourad & Walter, 2011); 9.80 (Santos, Spera, Fontaneli, & Dreon, 2011); 5.30 (Riquetti, 2014); and 13.66 (Ferreira, Neumann, & Hoffmann, 2014). In most of these studies, energy was primarily attributed to fuels (A. T. Campos et al, 2009;Ferreira et al, 2014), fertilizers (Mourad & Walter, 2011;Riquetti, 2014), herbicides (Assenheimer et al, 2009;Riquetti, 2014) and agricultural machinery (Melo et al, 2007;.…”

Section: Introductionmentioning

confidence: 99%

Energy use efficiency in soybean crops in different regions of Brazil

Guareschi

Martins

Sarkis

et al. 2020

Semina: Ciênc. Agrár.

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The soybean crop in Brazil has been growing in area and productivity in recent years and the analysis of its energy efficiency is very important to guarantee the sustainability of the production system. Assessment of energy efficiency (EE) enables the evaluation of the sustainability of agrosystems, as well as decision-making regarding the reduction in production costs and negative environmental impacts. In this context, the objective of this study was to assess energy efficiency of soybean in different regions of Brazil. For this purpose, 29 areas of soybean across the major producing states 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 MJ of energy consumed in the production of soybean crop, 6.1; 6.7; 7.1 and 7.2 MJ of energy were produced in the form of grain, respectively in the areas assessed in the Midwest, northeast, southeast and south regions of Brazil. Generally, the main energy expenditure on soybean cultivation in different regions of Brazil was with fertilizers, seeds and herbicides. The adverse weather conditions of the year / harvest evaluated in the south-central region of Brazil resulted in low soybean yields and consequently resulted in lower energy efficiency in these regions. The evaluation of energy efficiency in soybean crops to be representative must be carried out in different regions and edaphoclimatic conditions.

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Efeito de práticas culturais na conversão e no balanço energéticos

Cited by 11 publications

References 10 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

Energy flows in lowland soybean production system in Brazil

Energy use efficiency in soybean crops in different regions of Brazil

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