Avaliação da fertilidade do solo em área de pastagens no município de Boca do Acre Amazonas

Abstract

The southern region of the state of Amazonas is characterized by the presence of extensive areas of cultivated pastures, used for raising cattle, as this is one of the most important activities in the region. The cultivated pastures represent the main food support for the herds, however the Amazonian soils have natural characteristics of low fertility and high acidity, therefore, the pastures that were vigorous in the first years of life begin to show a gradual reduction in their productivity, reflecting on the zootechnical performance of the herds. Thus, this work sought to carry out a survey of soil fertility in pasture areas of five properties in the municipality of Boca do Acre - AM, presenting the main limiting factors to the development of grasses and offering strategies for soil improvement and pasture quality. The study was carried out in 5 rural properties, located in the south of the State of Amazonas, in the municipality of Boca do Acre - AM, where soil collection was carried out, collecting 04 samples (composite) per property visited at a depth of 0-20 cm. Subsequently, the samples were sent to the Soil Laboratory (DEAS/FCA), at the Federal University of Amazonas – Manaus – AM, where they were submitted to laboratory analysis. From the soil analyzes and statistical treatments we can observe that basically all the properties presented average texture, in addition there were significant differences in the following chemical attributes of the soils of the properties; aluminum, calcium, magnesium, potassium, base sum, effective CTC and aluminum saturation.