Efeitos da aplicação de vinhaça "in natura" ou concentrada associado ao N-fertilizante em soqueira de cana-de-açúcar e no ambiente.

The objective was to evaluate the fertilization with vinasse natura or concentrated and nitrogen fertilizer on yield, quality of sugarcane and dynamics of N, reflecting the improvement of soil fertility by adding nutrients, checking the influence of the treatments applied to the biometrics of the plant and also assess if the nutritional adequacy of culture has been achieved through the manifestation of its leaf up in the four months. The experiment was carried out in the field with rattoon cane in the 2nd cut, using an experimental randomized block design, with a total of 30 plots, where we have 5 treatments with 6 repetitions, the treatments were carried out according to the following proportions: T1 vinasse natura (120 m3 / ha), T2 vinasse (120 m3 / ha) + 60 kg of urea-N, T3 concentrated vinasse (20 m3 / ha), T4- 60 kg of urea-N / ha T5- Witness. It was found that there was no significant difference for the technological quality of sugarcane, however the quality of the broth and productivity there, since the treatments T1, T2 and T3 showed concentrations of K (potassium) higher than the treatments T4 and T5 . Among the foliar fertility treatments was found values that meet the sufficiency of culture. For the soil fertility K we have significant differences among depths, localization and treatment. Looking in-depth the effects of the application of the vinasse and the nitrogen fertilizer, there is a significant co-relationin soil parameters (NO3, soluble C and humidity).