Soil fertility and uptake of nutrients by sugarcane fertilized with filter cake

摘要

The use of organic wastes plays an important role in agriculture due to its potential for reducing cost of production and minimize environmental impacts. The work was carried out to evaluate the effect of mineral fertilizer and filter cake doses on sugarcane yield and soil chemical characteristics. The experiment was conducted in greenhouse in a randomized block design arranged in a factorial outline with five doses of filter cake (0; 9.25; 18.5; 27.75 e 35 g pot-1), three levels of mineral fertilizer (0; 50 e 100% of the recommended dose) and three replicates with one plant per plot. The results showed that filter cake addition favored soil fertility, increasing the contents of both macro and micronutrients and decreasing Al concentration. Filter cake increased pH while mineral fertilizer acidified the soil. Sugarcane plants responded to filter cake application by increasing the uptake of phosphorus, potassium and copper. The use of 9.25 g of filter cake associated with 50% of the mineral fertilization usually recommended is sufficient in order to increase sugarcane yield while reducing costs with mineral fertilizers.