Crescimento e produtividade do milho híbrido fertilizado com urina humana na agricultura de pequeno porte

Abstract

This research aimed to evaluate the response of hybrid corn in terms of yield and growth when fertilized with human urine. The design of the experiment was randomized blocks with five treatments. The treatments were: T1 - raw water and organic manure; T2 - raw water, organic manure and chemical fertilization, T3 - raw water and urine at the recommended dose; T4 - raw water and 0,5 urine of the recommended dose and T5 - raw water and 1,5 urine of the recommended dose. The volume of urine applied was determined from the nutritional demand of hybrid corn and the concentration of nitrogen in human urine resulting in 1,0 liter per linear meter for treatment – T3. The irrigation method chosen was drip irrigation, selected for being one of the most used by rural farmers. Concerning plant height and ear index, there was no significant difference (p> 0,05) when comparing the treatments applied. The weight of spikes varied according to the type of fertilizer (chemical or urine) and also to the volume of urine applied, where it showed difference between application of urine on the rate of 1,5 or 1,0 and application of urine on the rate of 0,5 or organic manure (p<0,05). The urine showed to be a potential pesticide to Spodoptera frugiperda, because none of the plants that received this treatment was affected by this plague, which adversely affected the productivity of treatment with NPKS. From the experimental point of view, this study showed promising results on the use of human urine to fertilize Zea mays.