Soil Structural Attributes And Oxidizable Carbon Fractions After Turkey Litter Applications

ABSTRACT The residues generated on rural properties are used in pastures and croplands and can alter some soil attributes. Therefore, the objective of this study was to evaluate the effects of a chronosequence of turkey litter application rates on the structural attributes and oxidizable carbon fractions of a Red Latosol under rotational grazing. The experimental design was a randomized block design, consisting of the following treatments: 0 Mg ha-1 of turkey litter (T0); 38.29 Mg ha-1 of turkey litter (T1); 54.79 Mg ha-1 of turkey litter (T2); and 69.24 Mg ha-1 of turkey litter (T3), corresponding respectively to 0, 6, 8, and 9 years of turkey litter use as fertilizer, with four replications. After several years of turkey litter application, soil bulk density was reduced from the control treatment to treatments T1 and T3. The use of turkey litter also increased macroporosity in treatment T2 compared to T0. Regardless of the treatments with turkey litter use, the proportion of macroaggregates increased, reaching increments of up to 53% in T3 relative to T0. The oxidizable fractions F1 and F2 were more sensitive, while fractions F3 and F4 were less sensitive to the management with poultry residue.