The objective of this paper was to evaluate the effect of nitrogen (N) on concentration and accumulation of macro and micronutrients in tuber of the most widely planted potato cultivars in Brazil. The experiments were carried out during fall/winter season, in a typic Hapludult soil. Four experiments were simultaneously set in the field. In each experiment one potato cultivar, Ágata, Asterix, Atlantic and Monalisa, and five N rates (0, 50, 100, 200, and 300 kg ha-1), as ammonium sulphate were evaluated. Each experiment was set in randomized complete block design with four repetitions. There was no effect of N rate on P, K, Ca, Mg, S, Fe and Zn concentration in potato cultivars Ágata, Asterix, Atlantic and Monalisa. However, the total N concentration and total N, P and Mn accumulation in the tubers response were affected by N rates in all the cultivars, with different patterns.
Solanum tuberosum L; nitrogen fertilization; contents
