Juliete Barros
Abstract:
The use of cover crops in the no-tillage system brings new challenges for proper management of nitrogen fertilization in succession crops, especially the most demanding in this nutrient, such as corn. The present work aimed to evaluate nitrogen fertilization in maize in succession to cover plants in southwestern Goiás. The experiment was developed at the Federal University of Goiás - Jataí. The treatments consisted of a 5X4 factorial: five cover plants (brachiaria grass (Urochloa ruziziensis), crotalaria (Crotalaria spectabilis), sorghum (Sorghum bicolor) with brachiaria, sorghum with crotalaria and spontaneous plants) and four doses. N coverage (0, 50, 100, 150 kg ha-1) with four replications, totaling 80 plots. The experimental design was in randomized blocks. The intercropping of sorghum with crotalaria and brachiaria provided higher input of dry matter to the succession maize. Single or intercropping with forage sorghum provided higher yield of corn in succession. Maize in succession to cover crops was responsive to cover nitrogen rates.
