NITROGEN AND POTASSIUM FERTILIZATION IN SIMPLE CORN HYBRID IN THE SOUTHERN CONE OF RONDÔNIA

Abstract

Given the growing demand and importance of corn, achieving the crop's maximum production potential is crucial. This study aimed to evaluate the productivity of a simple corn hybrid in response to different nitrogen (N) and potassium (K) rates in the Southern Cone of Rondônia. Treatments consisted of five topdressing rates of N and K (0, 50, 100, 200, and 400 kg ha^-1). Plant growth characteristics responded to nitrogen fertilization. Significant differences were observed only for N rates in yield components. The maximum agronomically efficient rate found was 266 kg of N, achieving a productivity of 11,445.78 kg ha^-1. The interaction of increasing N and K rates negatively affected the foliar contents of Ca, Mg, and B.