Adubação nitrogenada e idade de corte na produção de matéria seca do capim-elefante no cerrado
Carregando...
Data
2012
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The objective of this study was to investigate the effect of the application of N fertilizer and the cutting age
on the dry biomass production of elephant grass. The experiment was performed with the variety Paraíso
and planted in a Ferralsol in 2008 in the district of Gurupi (State of Tocantins). Four different rates of urea
application were tested (0, 50, 100 and 150 kg ha -1 ) and harvests were made at 120, 150 or 180 days
after germination (DAG) of the setts. The dry matter and total N accumulation were evaluated. Dry matter
production increased with dose of N, the greatest effect being observed at 180 DAG. There was a linear
increase in dry matter (R 2 = 0.75**) and N accumulation (R 2 = 0.96**) permitting a productivity of 34 t
ha -1 of dry matter and an accumulation of 471 kg N ha -1 . The N utilization efficiency (biomass production
per unit of applied N) increased with plant age. The higher efficiency of N use favored the quality of
biomass production for energy production owing to the higher fibre content.
Descrição
Palavras-chave
Pennisetum purpureum, Bioenergia, Biomassa, Pennisetum purpureum, Biomass, Bioenergy
Citação
FLORES, Rilner A.; URQUIAGA, Segundo S., ALVES, Bruno J. R.; COLLIER, Leonardo S.; MORAIS, Rafael F. de; PRADO, Renato de M. Adubação nitrogenada e idade de corte na produção de matéria seca do capim-elefante no cerrado. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 16, n. 2, p. 1282-1288, 2012.