Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

This study aimed to evaluate levels of potassium and nitrogen fertilizer inversion in the black oat crop on corn yields. The experimental design was a randomized block with subdivided plots three repetitions. treatments were four fertilization strategies, two managements (forage cover crop). strategies involved winter (oats) summer (corn) application, respectively, following combinations (200-0; 150-50; 50-150; 0-200 kg N ha-1) (80-0; 60-20; 20-60; 0-80 K ha-1). We evaluated morphological aspects, grain productivity, chlorophyll contents, light interception oats for forage production ground cover, yield components productivity. Oats managed as showed higher mass but lower values residual biomass, canopy height, extended tiller length, lodging index, radiation interception, A total. Light when applied pasture. For crop, partially remaining row increases stalk diameter. Fertilization no significant effect both crops system, indicating that it is possible reverse or apply entire amount predicted winter.