Land-Use Changes the Chemical and Physical Properties of an Oxisol in the Brazilian Cerrado

Raphael Xavier Costa, Joaquim José Frazão, Roriz Luciano Machado, Débora Regina Marques Pereira, Leonardo Mariano do Nascimento, Ana Paula Santos Oliveira and Valter dos Santos Marques

Journal of Agricultural Science, 2024, vol. 12, issue 9, 181

Abstract: This research aimed to evaluate the effect of different land-uses on physical and chemical properties of Oxisols under cerrado conditions in central region of Goiás, Brazil. The data were analysed in a randomized experimental design in a 4 × 3 factorial arrangement with five replications. The land-uses were- 1-Annual crops, 2-Pasture, 3-Sugarcane and 4-Native forest (control). The second factor consisted of three sampling depths- 0-0.05, 0.1-0.2 and 0.2-0.3 m. The physical attributes analysed were- total clay (TC), natural clay (NC), bulk density (BD), particle density (PD), total porosity (TP), degree of flocculation (DF), soil resistance to penetration (SRP), gravimetric water content (%GWC). Chemicals attributes analized- pH in water (pH), calcium (Ca), magnesium (Mg), aluminium (Al), potential acidity (H+Al), potassium (K), phosphorus (P), soil organic matter (SOM), cation exchange capacity (T) and base saturation (V%). Annual crops showed higher K levels (0-0.3 m) and lower SOM values (0-0.3 m), Ca and Mg (0-0.05 m) affecting T in relation to the forest. The use sugarcane showed higher values of BD, PD and SRP, and smaller values of TP, SOM, P and T. On the other hand, the values of Ca and Mg are kept close to those of the control. The attribute V% is preserved for annual crops, sugarcane and pasture with values higher than those verified in native forest. The use pasture reduced TP and P and Ca, Mg and T. The land-uses studied reduced soil quality compared to the forest, in descending order were sugarcane > annual crops > pasture.

Date: 2024
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