RESUMOHá de se considerar a utilização de resíduos industriais como fontes de fertilizantes ao solo e as plantas. O objetivo deste trabalho foi estudar diferentes doses de nitrogênio em função a doses de torta de filtro no desenvolvimento inicial de MPB de cana-de-açúcar. O delineamento utilizado foi inteiramente casualizado em esquema fatorial 4x3, com 4 doses de torta de filtro e 3 doses de N, com 4 repetições. A variedade utilizada foi a CTC 9003. As avaliações ocorreram com 76 DAT (dias após o transplante) sendo: número de perfilhos, altura de plantas, massa úmida da parte aérea, massa seca total e relação raiz/parte aérea. A utilização de torta de filtro com doses de até 60 ton ha -1 combinadas com 100 kg ha -1 de N melhora o desenvolvimento inicial de MPB de cana de açúcar, podendo ser uma alternativa viável para o destino deste resíduo no solo. PALAVRAS-CHAVE: material orgânico, mudas, relação C/N, resíduo. ABSTRACTConsideration should be given to the use of industrial waste as sources of fertilizers to soil and plants. The objective of this work was to study nitrogen rate as a function of filter cake doses in the initial development of pre-sprouted sugarcane seedlings. The was design completely randomized in a 4x3 factorial scheme, with 4 doses of filter cake and 3 doses of N, with 4 replicates. The variety used was CTC 9003. The evaluations occurred with 76 DAT (days after transplantation): number of tillers, height of plants, mass humid of the part aerial, total dry mass and root/shoot relationship. The use of filter cake at doses of up to 60 ton ha -1 combined with 100 kg ha -1 of N improves the initial development of sugarcane, being a viable alternative for the destination of this residue in the soil.
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