The present work was developed with the objective of establishing response curves of black pepper to nitrogen, phosphorus and potassium in an Oxisol (Yellow Latosol, dystrophic) in Senador José Porfírio County, km 35 of the Transamazonian road, in Brazil. The levels of nitrogen, applied manually every year were (0; 40; 80; 120 and 160 kg ha-1 N) in the urea form, five phosphorus levels (0; 30; 60; 90 and 120 kg ha-1 P2O5) in the form of triple superphosphate and five potassium levels (0; 30; 60; 90 and 120 kg ha-1 K2O) in the form of potassium chloride. The experimental design consisted of blocks with three replicates, being the treatments disposed as an incomplete factorial. The spacing was of 3.0 m between lines and 2.5 m between plants with six useful plants per plot. The results evidenced positive response of nitrogen in relation to black pepper grain yield with the application of 72 and 78 kg ha-1 of N, for cultivars Cingapura and Bragantina, respectively. Only cultivar Guajarina responded to the phosphorus application. Growing levels of K2O, reduced the present potassium content in the foliar tissue of the peppers. The potassium addition favored the increase of the production of grains with the application of 42, 13 and 22 kg ha-1 of K2O, for the Cingapura, Bragantina and Guajarina cultivars, respectively.
Piper nigrum; fertilization; nitrogen; phosphorus; potassium