Forage and sugar-ethanol sector varieties of sugarcane at different spacing and nitrogen fertilization / Variedades de cana forrageira e sucroalcooleira em diferentes espaçamentos e adubação nitrogenada

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This paper objective is to evaluate the phytomass productivity and bromatologychal attributes of two sugarcane varieties, recommended for animal feed and for sugar-ethanol sector production, planted at two inter-row spacings and submitted to nitrogen fertilization. The experiment was conducted in Presidente Prudente-SP. The experimental design was in split-plot randomized complete block, where plots were installed in the inter-row spacing of 1.0 and 1.5 m, in the sub-plots was installed the sugarcane varieties IAC 86-2480 (forage) and RB 86-7515 (sugar-ethanol sector), and in the sub sub-plots was installed the nitrogen coverage fertilization with 0, 50, 100 and 200 kg ha-1 N. There is no influence of the inter-row spacing, or the variety and nitrogen fertilization on the number of the interril stems m-1 at the harvest. The sugar cane crop planted with 1.0 m inter-row spacing has increased productivity of stems + pointers than the inter-row spacing of 1.5 m. The sugar-ethanol sector variety RB 86-7515 has increased productivity of stems + pointers than forage IAC 86-2480, despite the inter-row spacing and nitrogen fertilization. The phytomass productivity of the forage variety is increased by sugarcane nitrogen fertilization only in 1,0m inter-row spacing, while the sugar-ethanol sector that does not respond to N. The sugar-ethanol sector variety has declined in crude fiber content of the phytomass because of the coverage N doses, however, associated with responsiveness to the inter-row spacing of crop.

ASSUNTO(S)

sugarcane as feed animal feed cana-de-açucar como ração sccharum spp. alimentação animal bromatology bromatologia saccharum spp. agronomia

ACESSO AO ARTIGO

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