Abstract

Corn is the most important crop in the world market, being greatly used for human and animal nourishment. Corn has limited production with the zinc deficiency of the Brazilian soils which requires proper and correct application for optimizing its productivity. This study aims to evaluate the foliar application of zinc at different times in the corn variety RB 9110 PRO. Analyzing zinc absorption with influecia temperature and relative humidity. The experiment was conducted in the village of Corbélia – PR in Brazil. The used design was completely randomized, consisting of 4 treatments: Treatment 1 - Control without zinc; Treatment 2 - application of zinc at 08 h:00 min; Treatment 3 - Zinc application at 16 h:00 min; Treatment 4 - application of zinc at 20 h:00 min was used in the basic fertilization formulated 10-15-15. The weight of a thousand grains and the productivity was assessed. Treatment 2 was statistically superior to all treatments producing 360 kg / ha^-1 higher than the witness, as the spike in size only witness was lower than the others, weight of 1000 grains there was no difference.

Key words: Productivity, Zea mays, Zn.