FERTIGATIONS EFFECTS WITH WASTEWATERS FROM INDUSTRY MILK AND COLD

The objective this work was to evaluate the effects of wastewater treated in facultative lagoons of stabilization inthe drip irrigation of the culture of lettuce. An entirely randomized delineation with 5 repetitions and 4treatments was used: irrigation with urea, irrigation with wastewater from cold storage room, irrigation withwastewater from industry milk and witness. The results found for pH and electrical conductivity in the soilsaturated extract had been remained in acceptable average values. The concentrations of nitrogen, ammonia andnitrate had not presented significant treatments. The biggest productivity of lettuce had been reached with thewastewater treatments.