The use of animal wastes in agriculture coupled with the growing of cover crops can provide sustainability to the agricultural system. Aiming to evaluate the effect of two systems of crops and sources of fertilizer on the corn crop, was conducted an experiment on Oxisol in the municipality of Marechal Candido Rondon (PR). The experimental design used was of randomized block with four replications and treatments in factorial scheme 2 x 3, consisting of two culture systems (succession wheat/corn and oat+vetch+turnip/corn) and three nutrient sources (mineral, organic and organic mineral). In June 2006, was deployed to the wheat crop and intercropping of cover crops. In October 2006 was sowed corn on the two systems. The fertilizations organic and organic mineral consisted of application of pig manure alone and combined with mineral fertilizer, respectively. The consortium of oats, hairy vetch, wild radish has shown itself capable of providing good amount of biomass, showing its viability for the production of plant cover the soil during winter. Corn grown in rotation with wheat yielded the highest uptake of N and K and higher yield. Mineral fertilization gave higher N uptake and corn yield compared with the organic fertilizer and organic-mineral fertilizer based on pig manure
Zea mays L.; succession of crops; organic fertilizer
