Produtividade de cana-de-açúcar sob adubação com torta de filtro enriquecida com fosfato solúvel

摘要: Phosphorus is considered an essential element for plants and it found in small amounts Brazilian soils. The filter cake residue, composed of a mixture bagasse decanting sludge, has high levels organic matter, phosphorus calcium. present the organic, its release, as happens to nitrogen, occurs gradually by mineralization microorganisms attack soil. This study aimed evaluate sugarcane vegetative growth yield under fertilization with enriched soluble phosphate. experiment was carried out Presidente Prudente, Sao Paulo State, Brazil, using randomized complete block design, 5x4 factorial scheme, where first factor consisted doses (0 t ha -1 , 0.5 1.0 2.0 4.0 ) second fertilizer kg 50 100 200 P 2 O 5 ), 4 repetitions, totalizing 80 plots. evaluated tiller number, at 30, 60, 90, 120 days after planting, o Brix, yield. stalk tillering were influenced rates applied Filter their combination phosphate did not change juice quality (Brix) harvest. KEY-WORDS: Saccharum spp.; organo-mineral fertilizers; triple superphosphate.