Propriedade Químicas de Latossolo Vermelho Submetido a Diferentes Manejos Agrícolas

Abstract

Alternative technologies for the rational use of the soil have always been the focus of discussions on adequate soil management to promote sustainable agriculture. Taking into account the impact of different management methods on soil chemistry, the type of system selected will change the chemical properties of Oxisols. The objective of this work is to use different management methods to evaluate changes in the chemical properties of Oxisols in the Cerrado. The experiment was developed in the city of Vianópolis-GO. The soil in the study area was classified as an Oxisol. The design used in the experiment was completely randomized. Three treatments and ten repetitions were used, which corresponded to the areas: typical cerrado, SPC, scarification and light harrowing (annual cultures) and the area with SPD (annual cultures). For each area under study, soil sampling was carried out in September 2019, with the collection of 10 simple samples (two between the lines and one in the line) for the SPD and 10 simple samples (two between the lines and one in the line) for the SPC and 10 simple samples from the typical cerrado area with the aid of a Dutch auger. The samples were sent to the laboratory and the results were subjected to analysis of variance and when there were significant differences, identified by the F test (P <0.05), the Tukey means test was applied, using the Sisvar 5.6 statistical program. The no-till system showed greater fertility for P and K. While the conventional no-tillage system performed better for pH, MO, CO, V, Ca, Mg, H + Al, Al, CTC and M. The typical cerrado showed reductions in the contents of MO, P, K, Mg, Ca, decrease in pH, lower effective CTC, base saturation and increase in aluminum content, when compared to SPD and SPC. The SPC presents nutrient contents close to the SPD due to the systematic use of organic fertilization with bovine manure.