SOIL CHEMICAL VARIABLES AFTER GROWING COVER CROPS ON YELLOW LATOSOL

• DOI: https://doi.org/10.22533/at.ed.973562507016

• Palavras-chave: Chemical attribute, top dressing, soil degradation, no-till farming, recovery of degraded areas

• Keywords: Chemical attribute, top dressing, soil degradation, no-till farming, recovery of degraded areas

• Abstract:

  This study evaluated the chemical parameters of the soil after growing grasses and legumes in a no-till system on a dystrocohesive yellow latosol soil in the same season (fall and winter). The experiment was conducted in the field in the forage sector of the Federal University of Recôncavo da Bahia, in the municipality of Cruz das Almas - Bahia. When the experiment was set up, soil samples were taken for an initial assessment of chemical parameters. A block experiment was then set up in the same area to measure different forms of soil management with initial conditions of degradation in the area. Composite samples were collected from the depths of 0.0 to 0.20 m and 0.20 to 0.40 m. The chemical variables studied were soil pH, available phosphorus, calcium, potassium, magnesium, sodium, aluminum, sulfur, cation exchange capacity, aluminum acidity, base saturation and organic matter. The treatments were subdivided into six treatments with four replications (blocks), namely: C- Crotalaria; Brac-Brachiaria decumbens; S- Sorghum; Aru- Aruana; G- Guandú Beans; M- Millet. Microsoft Office Excel software was used to record the data, which was statistically measured using SAS® statistical software (version 9.1), using the Tukey test and compared at P<0.05. The results showed that there was little interaction between the variables studied and the block composed of the treatments with affinity to the sub-plots and depth. According to the coefficients of variation in the statistical test, there was little significance in the results, which allows us to state that the lack of interaction or variation was possibly due to the fact that the work of recovering the degraded soil was still in the first year of cultivation/recovery. Therefore, most of the parameters have not yet shown any effects due to the fact that the reclamation is still in its initial phase. It can therefore be concluded that despite the results found, the study showed that the treatments had no significant effect when tested at the levels accepted in the hypothesis test.