SUZETE FERNANDES LIMA
Abstract:
In Cerrado's Biome, agricultural areas where there is no possibility of performing two harvests after harvest, they remain fallow until the next agricultural year. In these areas the incidence of weeds is high, leading to seed bank enrichment, making the management difficult over the years. Aiming to minimize the increase in weed infestation in no-till areas, two trials were developed. In the first one, weed suppression by eight cover crops (Urochloa ruziziensis, Pennisetum glaucum, Crotalaria juncea, Crotalaria spectabilis, Styzolobium aterrimum, Canavalia ensiformes, Cajanus cajan and Stylosanthes capitocha for indexes) was evaluated understanding of weed community behavior in the presence of cover plants. Among the species, Urochloa ruziziensis was most efficient in the production of plant mass, soil cover and weed suppression. In the second trial, the efficiency of three sowing methods (A haul, light-haul and in-line haul) and the need for application of 2,4-D herbicide for the establishment of Urochloa ruziziensis, aiming at the formation of vegetation cover was evaluated for no-tillage. In conclusion, the sowing seeds methods incorporation stood out when compared to the distribution of seeds on the soil surface.
