Yield and quality of elephant grass biomass produced in the Cerrados region for bioenergy
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Data
2012-10
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Resumo
The objective of this study was to evaluate the performance of two genotypes of
elephant grass, fertilized with and without N, for biomass production for energy use under the
edaphoclimatic conditions of the Cerrado. The genotypes Roxo and Paraíso, grown in a field
experiment in a Latosol in the Cerrado region were evaluated for biomass yield, nitrogen
accumulation, C:N and stem:leaf ratios, fibre, ash and P and K contents and calorific value. The
accumulated dry biomass ranged from 30 to 42 Mg ha -1 and showed no response to nitrogen
fertilization with the lowest biomass obtained by the genotype Paraíso and the highest by Roxo. The
total N accumulation followed the same pattern as for dry matter, ranging from 347 to 539 kg N ha -
1
. C:N and stem:leaf ratio of the biomass produced did not vary with treatments. The fibre contents
were higher in genotype Paraíso and the highest levels of ash in the genotype Roxo. The K content
in the biomass was higher in genotype Roxo and P did not vary between genotypes. The calorific
value averaged 18 MJ kg -1 of dry matter and did not vary with the levels of N in leaves and stems of
the plant. Both genotypes, independent of N fertilization, produced over 30 Mg ha -1 of biomass
under Cerrado conditions.
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Pennisetum purpureum, Nitrogen fertilizer, Bioenergy, Pennisetum purpureum, Bioenergia, Fertilização nitrogenada
Citação
FLORES, Rilner A.; URQUIAGA, Segundo; ALVES, BRUNO J. R.; COLLIER, Leonardo S.; BODDEY, Robert M. Yield and quality of elephant grass biomass produced in the Cerrados region for bioenergy. Engenharia Agrícola, Jaboticabal, v. 32, n. 5, p. 831-839, Sept./Oct. 2012.