Increase in the development of plants of purple ipê (Tabebuia impetiginosa) in function of the foliar fertilization with cow urine in the Southwest area of the Legal Amazon

Abstract

The increasing industrialization and agriculture in Brazil has promoted the generation of waste in significant amounts for the occurrence of environmental impact. However, these same residues, when managed under a scientific basis, could be used as raw material in food production. The present study aimed to evaluate the effect of foliar application of cow urine in the initial growth of Tabebuia impetiginosa. The experiment was conducted in a completely randomized design with seven treatments. Five treatments were set through the dilution of dairy cow urine in water to obtain concentrations 1, 2, 3, 4 and 5% (v/v), and additional urine and the lack of foliar fertilization with a 0,3% nitrogen, with four replications. At the dose 0% (pure water), it was administered only water. The dilutions were prepared by diluting urine into pure water moments before its application to the plants. The stored urine was applied in treatments of the initial period up to 75 days after collection. The foliar fertilization with the concentrations of urine and urea was performed at the same time when it was made the measurements of height and diameter. The use of cow urine at concentrations exceeding 3% provides an increase in the development, growth, dry matter production of shoot, root and total dry mass of plants from Tabebuia impetiginosa compared to conventional mineral fertilizer (urea 0.3% N).