Atributos do solo, da forrageira e comportamento de vacas leiteiras mestiças manejadas em sistema silvipastoril, em bioma cerrado

Abstract

Environmental degradation has been due to intense anthropic, contributing to unsustainable economic, social and environmental impacts of agricultural production in Brazil. The aim of this study was to evaluate the role of silvopastoral systems (SPS), seeking their views contributors to the sustainability of Brazilian livestock. We analyzed the influence of an SPS, established in the cerrado biome, with the performance of Eucalyptus tree (Eucalyptus) and Brachiaria brizantha cv. Marandu (BBM) as forage in the attributes of soil, forage, and the local microclimate in animal behavior. The species of the studied system, influence the soil fertility with increasing magnesium (Mg), CEC, as well as non-interference of aluminum (Al) in the superficial layer (0-2 cm). With regard to macronutrients, there was an increase of phosphorus (P). Organic matter (OM) showed a higher in the SPS. The presence of eucalyptus trees in pastures BBM did not reduce the production of dry matter (DM) of BBM in the three samples taken. Moreover, the trees affected the mineral composition of forage, and helping to improve the nutritional value of forage by increasing levels of crude protein (CP). For animal behavior, the only variable that was significantly different than the rest time was lower in the silvopastoral system in the first and third collection, indicating a tendency to increase the grazing time and ruminating on the SPS.