Chemical attributes of an ultisol cultivated with sugarcane after application of high doses of vinasse

ABSTRACT The use of high doses vinasse in sugarcane crop can cause modifications the chemical characteristics soil. aim this study was to evaluate effect application on an Ultisol cultivated with for 210 days. treatments used were equivalent 0 (D0), 150 (D150), 300 (D300), 600 (D600) and 1200 (D1200) m3 ha-1 plus a control treatment mineral fertilization. experimental design completely randomized six repetitions. Exchangeable potassium (K), calcium (Ca), magnesium (Mg) sodium (Na) contents, organic matter, cation exchange capacity, adsorption ratio, exchangeable percentage, electrical conductivity pH analyzed at 90, 120, days after planting (DAP), addition microbial basal respiration depths 0-0.20 0.20-0.40 m. Soil increased within proper range sugarcane, varying from 6.2 6.4. highest K Na contents found D600 D1200; availability occurred 120 DAP DAP, respectively, indicating competition between these nutrients sites. Organic matter content proportionally according dose applied. D1200 soil, greater magnitude m depth.