Management of nitrogen fertilization in the growth of black oat and corn yield in a no-tillage system.

Management of nitrogen fertilization in the growth of black oat and corn yield in a no-tillage system. The black oat is a crop that responds well to nitrogen fertilization, resulting in biomass Increase and accumulation of N, which can then be used ill succession by corn. The experiment was accomplished in Campo Mourao Parana state, over two agricultural years and this study had as its objective to evaluate the response of oats to nitrogen fertilization, as well as the yield of corn cultivated in succession. The treatments consisted of nitrogen application (120 kg ha(-1)) on the oats, through ammonium sulfate, as follows: 24-90-30; 0-90-30; 144-0-0: 0-0-0; these sequences of numbers correspond to N applied In the sowing of black oats (SA), N ill pre-sowing of-corn (PS), and N in the sowing of-corn (SM). In the treatment one, the oat received only the nitrogen fertilizer in sowing of 24 kg ha(-1) and in the treatment two, the oat was not fertilized, but the corn received it. In the treatment three, the oat received a nitrogen fertilizer basic ill sowing of 24 kg, ha(-1), as well it received 120 kg N of-corn, that made of 144 kg N ha(-1). The results led to the conclusion that the oats fertilized with 144 kg ha(-1) of N during sowing obtained a larger production of dry mass, as well it increased the N content and corn yield; the corn has not difference of yield when submitted to the nitrogen fertilizer in the beginning of the cultivation (120 kg ha(-1)) or when the fertilizer was applied all in the oats sowing (144 kg ha(-1)).