Yield and quality of elephant grass biomass produced in the cerrados region for bioenergy

Flores, Rilner Alves; Urquiaga, Segundo; Alves, Bruno José Rodrigues; Collier, Leonardo Santos; Boddey, Robert M.

doi:10.1590/s0100-69162012000500003

Cited by 40 publications

(35 citation statements)

References 12 publications

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“…Results for GCV in sugarcane stems noted in previous studies were 18.87 MJ kg -1 found by Ripoli et al (1991) and ranged from 14 to 22 MJ kg -1 as described by Quirino et al (2005) for species appropriate for energy production. In addition, the values found in this study are very close to those found in studies of other species used for energy purposes (Queno et al, 2011;Flores et al, 2012).…”

Section: Ash Content and Gross Calorific Value (Gcv)supporting

confidence: 90%

Effect of gypsum application on agro-energy performance of sugarcane varieties cultivated in a semi-arid environment

Albuquerque¹,

Rocha²,

Garcez³

et al. 2016

Afr. J. Agric. Res.

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Brazilian semi-arid soils can be dystrophic and often occur in areas with high agricultural potential. Gypsum application improves chemical and physical soil conditions, favoring root system development of plants and can improve sugarcane production for energy production, as a strategy for sustainable development, avoiding native vegetation destruction in semi-arid regions. This study aimed to analyze the impact of gypsum application on the agro-energy potential of three sugarcane varieties, through MS production, moisture, neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin, ash and gross calorific value (GCV). The experimental design consisted of 3 (varieties) x 2 (with and without gypsum) over two sugarcane growing periods in a completely randomized block design with four replications. The application of gypsum did not affect the tested agro-energy variables. GCV ranged around 17 MJ kg -1 , confirming the suitability of the varieties for bioenergy use in semi-arid regions, but there were no significant differences between sugarcane varieties.

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Section: Ash Content and Gross Calorific Value (Gcv)supporting

confidence: 90%

Effect of gypsum application on agro-energy performance of sugarcane varieties cultivated in a semi-arid environment

Albuquerque¹,

Rocha²,

Garcez³

et al. 2016

Afr. J. Agric. Res.

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“…Segundo Mello et al (2002) é possível selecionar clones de capim-elefante por meio do DC, objetivando maior PMS. Aproximadamente 72% da biomassa do capim-elefante correspondem ao colmo que possui alto teor de fibra, lignina e outros componentes importantes para uma boa qualidade de biomassa para energia (Flores et al, 2012).…”

Section: Resultsunclassified

Correlações e análise de trilha em capim-elefante para fins energéticos

Menezes

Daher

Gravina

et al. 2014

Agraria

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RESUMOPor sua elevada produção de matéria seca, o capim-elefante tem sido utilizado como fonte de energia renovável. A seleção para a melhoria de características pode influenciar na produção de matéria seca, razão por que se torna necessário o estudo da correlação entre essas características. Assim, os objetivos deste trabalho foram avaliar os coeficientes de correlação e os desdobramentos das correlações genotípicas em efeitos diretos e indiretos das variáveis, como altura das plantas, diâmetro do colmo, número de perfilhos e largura da lâmina foliar na produção de matéria seca em clones de capim-elefante. O experimento foi conduzido em Campos dos Goytacazes-RJ, utilizando-se quarenta genótipos de capim-elefante. O delineamento utilizado foi em blocos ao acaso, com duas repetições. Nos dois cortes avaliados as características de altura da planta, diâmetro do colmo e largura da lâmina foliar apresentaram correlação genotípica positiva e significativa, com a produção de matéria seca. A altura da planta foi a que mais influenciou, direta e positivamente, a produção de matéria seca durante o segundo corte. Já no terceiro corte isto ocorreu para as características diâmetro do colmo e número de perfilhos. Palavras-chave: biomassa, melhoramento de plantas, Pennisetum purpureum Correlations and path analysis in elephant grass for energy ABSTRACTThe elephant grass for its high dry matter production has been used as a source of renewable energy. The selection for the improvement of traits could influence the production of dry matter and therefore it is necessary to study the correlation between these traits. The objectives of this study were to evaluate the correlation coefficients and display genotype correlations into direct and indirect effects of variables such as plant height, stem diameter, number of tillers and leaf blade width in dry matter production in clones of elephant grass. The experiment was conducted in Campos dos Goytacazes-RJ, using forty genotypes of elephant grass. The design was a randomized block with two replications. Evaluated in two cuts, plant height, stem diameter and width of the leaf blade showed positive and significant genotypic correlation with dry matter production. Plant height was the most directly and positively influenced the dry matter production during the second cut. In the third section, it occurred to the characteristics stem diameter and number of tillers.

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“…20-cm-long cuttings were planted at depth of 10 cm, spaced by 20 x 20 cm, totaling 25 cuttings, with one bud each, per plot. This species was chosen for its high biomass production, promoted by the efficient fixation of atmospheric CO 2 (Flores et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

Copper and zinc fractionation in biosolid cultivated with Pennisetum purpureum in different periods

Oliveira

Cardoso

Sousa

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TIn order to reduce the effect of heavy metals on the biosolid, it is necessary to promote its phytoremediation. It is important to know the total content and chemical forms of these elements in the residue for analyzing its behavior and potential toxicity. Thus, the aim of this study was to evaluate the fractionation and behavior of Cu and Zn in biosolid cultivated with Pennisetum purpureum in different periods. The experiment was carried out using a randomized complete block design. The treatments, with five replicates, corresponded to Pennisetum purpureum cultivation in biosolid for 30, 60, 90, 120 and 150 days after planting. The total contents of Cu and Zn in the biosolid remained below the critical limits established by the CONAMA Resolution 357, and there was a reduction in these values with Pennisetum purpureum cultivation. Furthermore, the increment in the grass cultivation period caused intense reduction of Zn contents bound to organic matter, but there was an increase in soluble Zn and residual Zn. Additionally, there was an intense reduction in the content of Cu bound to sulfides. Therefore, for biosolid phytoremediation purposes, the grass should be cultivated for 150 days.Fracionamento de cobre e zinco em biossólido cultivado com Pennisetum purpureum em diferentes períodos R E S U M O Para atenuar o efeito da presença de metais pesados no biossólido, faz-se necessária a sua fitorremediação, sendo fundamental o conhecimento das concentrações totais e das formas químicas destes elementos no resíduo para fins de análise do seu comportamento e potencial toxicidade. Assim, objetivou-se avaliar o comportamento e fracionamento do Cu e Zn em biossólido cultivado com Pennisetum purpureum em diferentes períodos. O experimento foi realizado utilizando-se delineamento em blocos casualizados. Os tratamentos, em cinco repetições, corresponderam ao cultivo de Pennisetum purpureum em biossólido por 30, 60, 90, 120 e 150 dias a partir do plantio. As concentrações totais de Cu e Zn no biossólido ficaram abaixo dos limites críticos da Resolução CONAMA 375, havendo redução destes valores com o cultivo de Pennisetum purpureum. Além disso, o incremento do período de cultivo da gramínea causou intensa redução da concentração de Zn ligado à matéria orgânica; por outro lado, houve aumento do Zn solúvel e residual. Já para o Cu houve intensa redução da concentração do elemento ligado a sulfetos. Assim, para fins de fitorremediação do biossólido, recomenda-se o plantio da gramínea por 150 dias. Key words:sequential extraction sewage sludge speciation of heavy metals Palavras-chave: especiação de metais pesados extração sequencial lodo de esgoto

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Yield and quality of elephant grass biomass produced in the cerrados region for bioenergy

Cited by 40 publications

References 12 publications

Effect of gypsum application on agro-energy performance of sugarcane varieties cultivated in a semi-arid environment

Effect of gypsum application on agro-energy performance of sugarcane varieties cultivated in a semi-arid environment

Correlações e análise de trilha em capim-elefante para fins energéticos

Copper and zinc fractionation in biosolid cultivated with Pennisetum purpureum in different periods

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