Análise energética de sistemas de produção de etanol de mandioca (Manihot esculenta Crantz)

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

doi:10.1590/s1415-43662010000400015

Cited by 19 publications

(14 citation statements)

References 13 publications

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“…QUESADA et al (1987) found a greater share of inputs (83.71%). The most representative energy expenditures in cassava production are also from the inputs (SALLA et al, 2010b). Analyzing family systems of cotton production, ROMERO et al (2008) found that the industry energy supply prevailed on fossil fuels and, in turn, both predominated over biological energy, which was also observed in the research mentioned.…”

Section: Resultsmentioning

confidence: 82%

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: 82%

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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“…On the other hand, cassava adapts easily to soil and weather conditions if compared with corn. Unlike this crop, it demands low concentration of nitrogen so that it has lower energy dependence on that nutrient (Salla et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Chemical Attributes of an Oxisol Under Different Agricultural Uses in the Brazilian Semiarid Region

Arruda¹,

Portela²,

Medeiros³

et al. 2018

JAS

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Different soil managements evidence soil properties, contributing positively or negatively to its quality. A study was conducted in the city of Martins, Rio Grande do Norte (RN) state, in four cultivated areas: corn intercropped with beans (CICB), cassava monocrop (CAMO), bean monocrop (BEMO) and native forest (NF, considered as the original soil condition). This study aimed to evaluate changes in the chemical properties of an Oxisol in function of different agricultural uses (N, P, K+, Ca2+, Mg2+, Na1+, Al3+, pH, EC, H+Al, BS, V, CEC, t, m, OM and ESP) and the distinction of environments using multivariate analysis. The sampling was performed up to 30 cm deep. Soil pH values were kept close to 5.5, except for the area with corn intercropped with beans, whose values were higher than 7.0. Corn intercropped with beans had the highest concentrations of K+, Na+ and Ca2+ on the soil, with a direct impact on base sum. Different uses modified soil chemical properties. Corn intercropped with beans differs from the other treatments due to the addition of solid waste to the soil. Principal component analyses showed pH and exchangeable bases are the most sensitive indicators of environment separation.

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“…Mossoró sob diferentes regimes hídricos INTRODUCTION Cassava is one of the world's major sources of food, especially in developing countries where it is grown using low technology in smallholdings. In addition, as an amylaceous crop cassava has been shown to have potential for ethanol production, as an alternative fuel source (SALLA et al, 2010). It is a tropical crop with low susceptibility to disease, being moderately tolerant to environmental stresses such as drought (FAO, 2014;OLIVEIRA et al, 2015).…”

Section: Initial Growth Of Cassava Plants CV Mossoró Under Differentmentioning

confidence: 99%

“…A mandioca é considerada uma das principais fontes de alimento energético do mundo, especialmente nos países em desenvolvimento, onde é cultivada em pequenas áreas e com baixo nível tecnológico. Além disso, a mandioca tem mostrado ser uma das culturas amiláceas com potencial para a produção de etanol e, portanto, uma alternativa energética (SALLA et al, 2010). É uma cultura tropical e rústica, com pouca suscetibilidade a doenças, sendo moderadamente tolerante a estresses ambientais como a seca (FAO, 2014;OLIVEIRA et al, 2015).…”

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Initial growth of cassava plants cv. Mossoró under different water regimes

Neto

Coelho

Andrade

et al. 2018

AGRO@MBIENTE ON-LINE

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The sprouting phase of cassava is critical for the establishment of the plant, with this phase being dependent on soil moisture. As such, this study evaluated the effect of different irrigation levels on the initial growth of cassava cv. Mossoró in semi-arid conditions. The experiment was conducted under completely randomized design conditions with 5 replications. The treatments in pots containing one plant per experimental unit consisted of 5 irrigation levels, 0, 25, 50, 75 and 100% of the reference evapotranspiration (ETo, mm day-1), which corresponded to totals for the experimental period of 11.20; 42.15; 73.09; 104.03 and 134.97 mm, respectively. At 30 days after planting, the number of leaves and stems, as well as the dry mass of the shoot and the root had increased sharply for irrigation levels up to 73.09 mm. For higher irrigation levels there was a tendency for plant growth stabilization; however, above 104.03 mm there was a decrease. Shoot and root dry mass ratio showed severe water stress at the 11.20 mm level, being more damaging to root growth. Plant height showed a positive linear trend as the level of irrigation was increased, as opposed to water use efficiency. Therefore, irrigation with 50% replacement of ETo (73.09 mm) provided the best conditions for early growth of cassava.

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Análise energética de sistemas de produção de etanol de mandioca (Manihot esculenta Crantz)

Cited by 19 publications

References 13 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

Chemical Attributes of an Oxisol Under Different Agricultural Uses in the Brazilian Semiarid Region

Initial growth of cassava plants cv. Mossoró under different water regimes

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