FOLIAR FERTILIZATION WITH VINHOTO ASSOCIATED WITH LIQUID LIQUID SLUDGE IN THE DEVELOPMENT OF CONILON COFFEE SEEDLINGS

Abstract

The cultivation of coffee seedlings gained space in the Brazilian market, favoring mainly family farming, where one of the challenges is to reduce the cost of production. The objective of this work was to evaluate the effect of different concentrations of tannery sludge associated with vinasse as a foliar fertilizer on the development of conilon coffee seedlings. The experiment was conducted in a completely randomized design, with 6 treatments (nitrogen + potassium (N + K), 10% tannery sludge (L) + 90% vinasse (V), 25% L + 75% V, 50% L + 50% V, 75% L + 25% V and 90% L + 10% V), 10 repetitions and 10 plants in each plot. The evaluated characteristics were: leaf area (AF); plant height (AP); root length (CR); stem diameter (DCa); crown diameter (DCo) and number of sheets (NF). In comparison to N + K for all parameters evaluated in the concentrations of residues, the behavior of the curve obtained higher values, with regression peaks estimated at: 50.4% V + 49.6% L for NF; 48,7% V + 51,3% L para AP; 66% V + 34% L for DCo; 61.3% V + 38.7% L for DCa; 50.1% V + 49.9% L for AF; and 44% V + 56% L for CR. The best results for seedling development characteristics, when compared to treatment with nitrogen + potassium, were estimated among 44% vinhoto + 56% tannery sludge and 66% vinhoto + 34% tannery sludge.