The aim of this study was to evaluate the biomass of tansagem (Plantago major L.) under different doses of phosphorus and nitrogen. The experimental design used was the one of randomized blocks in a 5x2 factorial arrangement with four repetitions involving the phosphorus fertilization (0, 50, 100, 200 and 400 kg ha-1, of P2O5) and nitrogen fertilization (40 and 80 kg ha-1 of N). The total height, leaf number, foliar area and fresh and dry masses of the entire plants were evaluated. The height of the plants was not influenced by the doses of P and nor of N. The phosphorus fertilization increased the leaf number for plant. The biggest doses of the nutrients (400 kg ha-1 of P2O5 and 80 kg ha-1 of N) propitiated greater foliar area and bigger fresh and dry masses.
Macronutrients; medicinal plant; Plantago major
