Abstract
The aimed of this study was to evaluate the effects of different dosages of turkey litter on soil’s chemical attributes and yield of the Urochloa decumbens in classified as degraded pasture. The work was performed at the municipality of Mineiros-GO between October/2011 and September/2013 in Quartzipsamment soil. The treatments consisted in applications of 0, 3, 6, 9 and 12 Mg ha-1 of turkey litter at a randomized-complete blocks design with four replications. Was evaluated the fodder’s productivity and the following soil’s chemical attributes: organic matter, hydrogenionic potential (CaCl2), phosphorus (resin), potassium, calcium, magnesium, cation exchange capacity and base saturation of soil. In general terms, the increase of turkey litter’s doses increased the grass productivity and the supply of nutrients of the soil, maintaining the balance of the soil-plant system. The dosage of 12 Mg ha-1 year-1 of turkey litter ensure higher amounts in the soil’s chemical attributes and in the productivity of dry mass of Urochloa decumbens.
Highlights
The usage of grazing for ruminant production is the most economically practicable ways of providing the herd’s sustenance, since it reduces the cost of production, being the best alternative to competitive and sustainable animal production (ALENCAR et al, 2009; 2014).Even being the species of Urochloa welltolerating to the specific soil and climate conditions of the Cerrado, the improper management and the lack of corrective fertilization at the establishing and of maintenance fertilization for replacing the soil’s nutrients contribute to the damage of the areas with cultivated pasture (CASTRO et al, 2012)
The application of growing dosages of turkey litter provided a quadratic effect in the productivity of dry mass (DM) of the Urochloa
The dosages of turkey litter that maximized the productivity of DM of Urochloa decumbens were 12.0 and 11.1 Mg ha-1 year-1, resulting in the productivity of DM of 26.5 and 9.6 Mg ha-1 year-1 for the agricultural years 1 and 2, respectively
Summary
Even being the species of Urochloa welltolerating to the specific soil and climate conditions of the Cerrado, the improper management and the lack of corrective fertilization at the establishing and of maintenance fertilization for replacing the soil’s nutrients contribute to the damage of the areas with cultivated pasture (CASTRO et al, 2012). This way, these areas tends to present lower tolerance to water stress, emphasizing the effects of weather extremes above the pasture development and growing (BONFIM-SILVA et al, 2011). The changes will benefit the plant if the residues are applied in the right amount, way and frequency, otherwise the system might present adverse environmental impact (RAMOS et al, 2017)
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